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T-Maxx 3.3 Owners Manual

1. yy y LI y ER E MODEL 4909 q K i y AV Y f BEFORE You PROCEED SAFETY PRECAUTIONS TOOLS SUPPLIES AND REQUIRED EQUIPMENT ANATOMY OF YOUR T MAxx 3 3 Quick START GETTING UP TO SPEED GLUING THE TIRES AND DECORATING YOUR T MAxx 3 3 THE TRAXXAS TQ 3 RADIO SYSTEM THE TRX 3 3 RACING ENGINE DRIVING YOUR T MAxx 3 3 TUNING ADJUSTMENTS MAINTAINING AND STORING YOUR T MAxx 3 3 TROUBLESHOOTING INDEX 2 e T MAXX 3 3 INTRODUCTION Thank you for purchasing a Traxxas T Maxx 3 3 Nitro Monster Truck T Maxx is legendary for providing the perfect balance of size speed power and agility With the new T Maxx 3 3 we ve turned that balance upside down with mind boggling over the top horsepower Chances are you ve never driven anything like this before Just how powerful is the new T Maxx 3 3 The wheelie bar is mandatory installed equipment The TRX 3 3 delivers brutal bottom end torque for amazing wheel standing launches along with hard charging acceleration that is second to none Hammer the throttle at any speed and the T Maxx responds like a caged animal that s been unleashed for destruction The T Maxx 3 3 is without question the highest performance T Maxx ever made Your T Maxx 3 3 combines automatic two speed shifting in forward and reverse with powerful four wheel disc braking The patent pending transmission design and three channel TQ 3 radio system put these
2. Remember always turn the TQ 3 transmitter on first and off last to avoid damage to your T Maxx 3 3 Never turn the radio off while the engine is running as 16 e T MAXX 3 3 THE TRAXXAS TQ 3 RADIO SYSTEM Each time you prepare to run your T Maxx 3 3 you must clear your frequency to be sure no EO channel 1 Brown one else in the area is using the same channel Channel 2 as you Red EO channel 3 There are six possible channels numbered Orange 1 through 6 Each is represented by a color Channel 4 Look at the crystal plugged into the back of Yellow your transmitter to determine which channel Channel 5 your truck is assigned to Green GO channel 6 Blue Always turn your TQ 3 transmitter on first and off last This procedure will help to prevent your T Maxx 3 3 from receiving stray signals from another transmitter or other source and running out of control Always turn your transmitter on first Always turn your receiver on second Always have the transmitter and receiver turned on before you start the engine Never turn the radio system off while the engine is running The on off switch in the model only turns the receiver on and off It does not turn off the engine Always use new or freshly charged batteries for the transmitter and make sure the receiver batteries are fresh The function light on the OptiDrive will flash red if the receiver batteries become weak
3. after each hour 42 after each session 42 after run maintenance 43 periodic 42 Needle seat 24 Needle valve 21 Neutral position 10 Nitromethane nitro 21 content 21 22 percentage 20 22 O ring 21 On Off switch 6 9 OptiDrive 6 9 15 Pinch test 32 Pivot Ball 6 Priming 21 Punch 21 Quick Start 7 Radio system TQ 3 9 adjustments 14 servo reversing 15 steering trim 14 throttle neutral 14 throttle trim 14 controls 14 range 9 44 range testing 17 rules 16 terminology 10 using 17 Receiver 9 10 box 6 Rich 21 25 rpm 21 Safety 4 Servos 10 shifting 6 9 steering 6 9 throttle brake 6 9 Shift Rod 6 Shock Damper 6 fine tuning 35 mounting positions 35 36 tower 6 Skid Plate 6 40 Slipper clutch 6 42 adjusting 37 Spur gear 6 changing 38 mesh 38 Stall 21 Storage 42 Suspension Arm 6 Suspension tuning 35 caster adjustment 35 pivot ball caps 35 TDC 21 45 Tire gluing 8 Toe in 37 Tools and equipment 5 Transmission 6 access plug 6 adjusting 38 tuning 37 Transmitter 9 10 adjustment 14 battery compartment 9 controls 14 installing batteries 11 power indicator 9 power switch 9 servo reversing switch 9 steering wheel 9 throttle neutral adjust 9 throttle trigger 9 trim 10 steering trim 9 throttle trim 9 Troubleshooting 44 Tuned pipe 6 19 21 exhaust header 6 exhaust tip 19 pipe hanger 6 Turnbuckle Toe Links 6 37 Two speed see also Transmission 38 Two speed ratio 39 Wear in 2
4. slipper clutch gear on the transmission From the factory T Maxx 3 3 is equipped with a 22 tooth clutch bell and a 54 tooth spur gear This combination will provide a good balance of acceleration and top speed Optional spur gears and clutch bell gears are listed on your parts list Refer to the chart on page 39 for possible gearing combinations TUNING ADJUSTMENTS Adjusting the Two Speed Ratios T Maxx 3 3 is equipped to allow adjustment to the 2 speed by installing optional close and wide ratio gearsets This requires transmission removal and disassembly see www Traxxas com for detailed instructions The close ratio gearsets will reduce top speed slightly but will provide more powerful acceleration by reducing engine rpm loss when shifting from 1st T Maxx 3 3 is equipped with a disc brake that rides on the yoke of the transmission s front output shaft The brake is preset at the factory and should not require attention As the brake material wears future adjustments may be necessary gear to 2nd gear The wide ratio gear set is designed for wide open areas Brake Shoulder Screw Adjustment and will increase top speed but reduce acceleration due to greater rpm The two shoulder bolts that are used to secure the brake pads to the loss when shifting gears transmission housing may need to be adjusted periodically as the brake material wears down They should be tightened so a 0 50mm 020 gap exists between the disc and the brake pad on
5. wait at least three minutes before attempting to start the engine to give the starter motor time Use a Strong Starter Battery to cool A weak starter battery or one that has not been fully charged may not deliver enough power to crank the engine over at the appropriate rpm to keep the piston from sticking at top dead center TDC A new engine will typically have a tight fit between the piston and the top of the sleeve This is a tapered fit and a tight piston sleeve fit on initial startup is desirable for those who want the best performing engine Make sure you are using a good quality battery pack that is fully charged new batteries usually require several charge cycles to reach peak voltage and full capacity This is especially important with a new engine that needs to be broken in If the engine sticks at TDC see page 44 for instructions on freeing the engine It s normal for your EZ Start controller to become warm after repeated use Shutting Off The Engine Turning off the switch for the radio will not shut off the engine To shut off the engine use the shut off clamp on the fuel line Squeeze the clamp closed to shut off the fuel supply to the engine Don t forget to release it when you restart the engine Avoid shutting off the engine by placing your finger over the exhaust outlet especially if you are through driving for the day This will leave more unburned fuel in the engine that could lead to harmful corrosion
6. Always be careful not to touch the exhaust pipe after running it can become very hot 05S T MAXX 3 3 27 E 28 e See Important Points to Remember on page 4 for other precautions Never run your T Maxx 3 3 indoors Since the TRX 3 3 Racing Engine exhaust fumes are harmful always run your model outdoors in a well ventilated area Your TRX 3 3 Racing Engine doesn t usually require priming If you do need to prime your engine watch the fuel line carefully to avoid flooding your engine See page 44 for information on clearing a flooded engine Factory Needle Settings Your carburetor is preset at the factory to give the correct air to fuel ratio and idle speed for engine break in Do not adjust the carburetor unless you observe a poor running condition that requires correction see page 25 for stock settings Higher nitro requires a richer fuel mixture When running 33 fuel richen your high speed needle 3 4 turn if previously running 20 nitro and then re tune the engine for maximum performance See page 22 for more information as T MAXX 3 3 THE TRX 3 3 RACING ENGINE The TRX 3 3 Racing Engine uses a ringless aluminum brass chrome ABC piston sleeve construction This type of engine design relies on a very precise running fit between the piston and sleeve for cylinder sealing Engine break in is necessary to allow the piston and sleeve to develop an extremely precise fit and optimum
7. If the nose of the truck is too high then quickly tap the brake to level the truck in the air Drive over large obstacles such as curbs and rocks at an angle instead of head on This will allow the suspension to articulate and absorb the impact much easier Even though T Maxx 3 3 is capable of high speed in reverse it is very difficult to control while driving in reverse Limit your reverse speed to prevent crashing or flipping your T Maxx 3 3 Change or clean your air filter element after each hour of running This is critical for the life of your engine Running time includes the engine break in period Adjusting the Pivot Ball Caps The pivot ball caps should be adjusted so that the pivot balls operate freely in the axle carriers with no excess play Use the provided four way suspension multi tool to tighten or loosen the pivot ball cap Caster Adjustment The T Maxx 3 3 offers the ability to adjust the caster angle of the front suspension Caster adjustment may be used to influence the understeer oversteer handling characteristics of the T Maxx 3 3 Increasing the caster angle will increase the tendency of the truck to oversteer less traction on the rear tires more traction on the front tires while decreasing the caster angle will cause the truck to have a tendency to understeer push in the turns This effect becomes more pronounced at higher steering angles and higher spring rates Caster is adjusted by repo
8. Weak batteries will limit the radio signal between the receiver and the transmitter Loss of the radio signal can cause you to lose control of your T Maxx 3 3 Then start your engine it M The TQ 3 Radio System was pre adjusted at the factory The adjustment should be checked before running the model in case of movement during shipping Here s how 1 Fully extend the chrome antenna mast on the transmitter and turn the switch on The red indicator light on the transmitter should be solid red not flashing 2 Turn on the receiver switch in the model The switch is located in the top of the radio compartment The function light on the OptiDrive ESM should be green A red flashing LED indicates low voltage in the receiver batteries The sensor LED is intermittent depending on the rotor position 3 Position T Maxx 3 3 so that its front wheels are off the ground 4 Turn the steering wheel on the transmitter back and forth and check for rapid operation of the steering servo Also check that the steering mechanism is not loose or binding If the steering operates slowly then make sure you have fresh receiver batteries 5 When looking down at model the front wheels should be pointing straight ahead If the wheels are turned slightly to the left or right slowly adjust the steering trim control on the transmitter until they are pointing straight ahead 6 Operate the throttle trigger on the transmitter and check for rapid oper
9. above sea level the lower air density may require you to lean your high speed fuel mixture slightly from the factory break in settings Try this if you are experiencing difficult starting or extremely sluggish engine performance at high altitude 2 As you gain experience in the hobby you may discover that many people have differing opinions on what is the proper procedure to break in a model engine Only use the Traxxas break in procedure Other break in procedures could result in a weak damaged or otherwise poor performing engine The procedure outlined here was extensively tested and proven to yield better performing engines than other common break in methods Even if you have years of experience using model engines please do not ignore this caution T MAXX 3 3 29 30 T MAXX 3 3 THE TRX 3 3 RACING ENGINE Winter Break in Tips During the break in process the piston and sleeve wear into each other to form a precise fit The engine needs to heat up to a temperature around 200 to 215 degrees to allow the piston and sleeve to achieve this fit properly A precise fit between these two components is critical for proper compression and optimum performance If the engine runs too cold during break in the piston and sleeve will not expand to their appropriate sizes for break in and this can lead to premature wear of these components This wear may not become apparent until after winter has past and th
10. at the time you finished fine tuning your carburetor Current weather conditions can be found online from national websites local TV news websites and television This information will be considered your baseline setting You may need to adjust your carburetor needles to compensate for changes in temperature and barometric pressure air density from day to day Generally you ll need to richen the fuel mixture when the weather is colder than your baseline temperature and the air density is higher Lean the fuel mixture when weather is warmer than your baseline temperature and the air density is lower The chart below provides general guidelines on how weather conditions affect air density when they move higher or lower than your baseline setting see page 24 for detailed info on how air density affects mixture settings Tuning the Engine by Temperature The following procedures require an optional infrared temperature probe or on board temperature gauge Traxxas on board digital temperature gauge part 4091 Engine temperature can be used as an effective tuning aid when you understand the relationship between engine temperature and ambient temperature The engine operating temperature when tuned for maximum performance will vary according to atmospheric conditions engine load gauge accuracy and many other factors The atmospheric condition that has the most influence on engine temperature is air temperature Expect the engine temperatu
11. batteries in the transmitter See page 11 T Maxx 3 3 requires 8 AA alkaline or rechargeable batteries for the transmitter 5 Decal and Install the body See page 8 You will need to use the body during break in so it s best to apply any additional decals before you use the body 6 Install batteries in the model See page 12 T Maxx 3 3 requires 4 AA alkaline or rechargeable batteries for the receiver 7 Install the EZ Start battery See page 26 Install and connect a charged 7 2 volt battery pack in the EZ Start controller 8 Turn on the radio system See page 16 Make a habit of turning the transmitter on first and off last 9 Check servo operation See page 17 Make sure the throttle shifting and steering servos are working correctly E The Quick Start Guide is not intended to replace the full operating instructions available in this manual Please read this entire manual for complete instructions on the proper use and maintenance of 10 Range test the radio system See page 17 Follow this procedure to make sure your radio system works properly at a distance and that there is no interference from outside sources 11 Fill the fuel tank See page 23 Use your fuel dispensing bottle to fill the tank your T Maxx 3 3 12 Connect the EZ Start to the model See page 27 Learn the proper way to use the EZ Start electric starting system 13 Start the
12. contact us and what your support options are Quick Start This manual is designed with a Quick Start path a gt that covers only the necessary procedures to get your model up and running in the shortest time possible If you are experienced with Traxxas products you will find it helpful and fast Be sure and read through the rest of the manual to learn about important safety maintenance and adjustment procedures Turn to page 7 to begin the Quick Start path R C enthusiast it s important to read and follow the procedures in this manual T Maxx 3 3 contains new technologies in the engine suspension and transmission operation that you may not be familiar with Pay particular attention to the fuel and break in requirements for the engine lvanced J T Maxx 3 3 is made to be a complete package that starts with the highest level of engineering a professionally produced DVD to acquaint you with the starting racing and maintenance procedures and is equipped stock with the most powerful Ready To Race engine available We want you to feel confident that you own the best performing truck in the market and that it is backed by a team of professionals who aim to provide the highest level of factory support possible T Maxx 3 3 is about experiencing total performance and satisfaction not just with your truck but also with the company that stands behind it Thank you again for going with Traxxas We work hard every day to assure yo
13. cylinder sealing Therefore proper engine break in is critical to achieving the fastest most reliable engine performance Allow yourself about 1 to 1 2 hours to complete the break in procedure The engine break in period will take 5 tanks of fuel in a T Maxx 3 3 The break in time is not the time to impress your friends with your new T Maxx 3 3 You must wait until the engine is fully broken in before attempting sustained high speed running Patience and careful attention during break in will reward you with the best performing TRX 3 3 Racing Engine possible During break in your engine may appear to malfunction with symptoms like stalling inconsistent performance and fouled glow plugs These are simply the normal break in pains engines sometimes go through They will disappear once your engine is fully broken in Many owners report not experiencing any of these symptoms with TRX Racing Engines We recommend to go ahead and replace the glow plug with a new one after the engine break in procedure Engine Break in Procedure The focus during break in is to vary and limit the engine speed This will be accomplished by accelerating and stopping at different rates for the first 5 tanks of fuel As the engine begins to break in the duration and intensity of the acceleration will gradually increase Sustained high speed running is not permitted until the 6th tank of fuel Perform the initial break in on a large flat paved surface T Maxx
14. depressed If the glow plug LED does not light make sure the blue glow plug wire is tightly connected and is not damaged in any way If the wire is good then replace the glow plug It is normal for glow plugs to require periodic replacement Only use Traxxas heavy duty long glow plugs see your parts list Check to make sure the fuel is getting to the carburetor Remove the fuel line where it connects to the carburetor to see if there is fuel in it If not you may need to prime the engine Reconnect the fuel line and then refer to page 28 for instructions on priming the engine Check your fuel mixture settings It may be necessary to adjust the fuel mixture if the outside temperature or barometric pressure has changed significantly since the last time the engine was run see Fine Tuning the Carburetor on page 33 Turn the high speed needle out rich counterclockwise 1 4 turn hold the throttle trigger at about 1 2 throttle and try again to start the engine Once started retune the engine for performance see page 31 T MAXX 3 3 43 44 e T MAXX 3 3 TROUBLESHOOTING YOUR T MAxx 3 3 S The engine could be worn If the fit between the piston and sleeve is loose compression is reduced and the engine will be difficult to start when it is warm and may tend to stall when running and when the throttle is closed suddenly to idle Engine life depends on many factors including fuel type air filter maintenance needle settings and how t
15. from the truck For clarity these instructions show the the backing polish remover will process with the wheels removed remove excess glue from iti r g 1 Remove a wheel from T Maxx 3 3 Carefully position the decal over the i using the larger 8mm end of desired location and press one side on the glow plug universal the body Pull the decal tight and use wrench a finger to gradually smooth out any For best results while air bubbles as you apply the decal gluing clean the bead of the tires and the grooves of the wheels with denatured alcohol before applying glue This 2 Use your thumb to push the side of the tire away from the rim Look at the photos on the box for Place one or two drops of CA typical decal placement glue into the opening and removes any mold release agent residue from the tires and wheels release the tire Capillary action will draw the glue around the bead of the tire providing a better bond 3 Repeat step two at four or five points around the rim until the tire is completely secured to the rim Turn the rim over and repeat the process for the inside of the rim tire Repeat for the other three wheels 4 Reinstall the wheels make sure none of the axle pins have fallen out from behind the hex hubs 05 gt 8 e T MAXX 3 3 Your T Maxx 3 3 is equipped with the TQ 3 radio system The TQ 3 is a 3 channel system that provides up to a quarter mile range and control for up to
16. functions right at your fingertips The new TRX 3 3 Racing Engine is the most powerful engine of its size ever available in a Ready To Run truck Advanced engineering and design along with thousands of hours of testing puts the TRX 3 3 in a class by itself Each part of the TRX 3 3 from the air filter on the slide carburetor to the tip on the dyno tuned exhaust system has been carefully engineered to provide maximum power over the broadest rpm range T Maxx 3 3 is equipped with the patent pending Optidrive electronic transmission control Advanced electronic reduce the number of moving parts inside the transmission for less weight smooth engagement and efficient performance Traxxas was the first with standard on board electric starting The EZ Start has evolved into an incredibly advanced and reliable starting solution featuring thermal protection for the motor and built in diagnostics to monitor the condition of the glow plug We know you re excited about getting your new T Maxx 3 3 on the road but it s very important that you take some time to read through the Owners Manual This manual contains all the necessary set up break in tuning and operating procedures that allow you to unlock the incredible performance and adjustment potential that Traxxas engineers designed into T Maxx 3 3 Even if you are an experienced Traxxas Support Traxxas support is with you every step of the way Refer to the next page to find out how to
17. is set to Optimum RUNNING for Climbing amp Low Speed Operation SAFE RANGE RICH Sluggish Performance Break In Settings nas T MAXX 3 3 31 THE TRX 3 3 RACING ENGINE H Low Speed Fuel Mixture Adjustment Idle Speed Adjustment SET SE The low speed mixture is always set after the high speed needle is Once the high and low speed mixtures have been set reduce the idle speed fuel mixture it is correctly adjusted The low speed mixture is set using the pinch test speed to the minimum reliable idle speed Remember this adjustment very important to make 1 Once the engine is warm do several high speed runs to confirm should be made while the engine is running at normal operating several high speed runs temperature with T Maxx 3 3 between that the high speed needle is set correctly adjustments to clear out 2 Bring the vehicle in and pinch closed the fuel line going into the 1 Turn the throttle trim on the transmitter so the brakes are any excess fuel Perform carburetor use the engine shut off clamp The engine should run applied note its original position This ensures that the throttle ge ele immediately for 2 3 seconds speed up and then shut off slide is resting against the idle adjustment screw See SE 3 If the engine runs longer than 3 seconds then lean the low speed 2 Turn the screw counterclockwise to reduce the idle speed or period of time it could needle 1 16 turn make several more high speed runs and retest clo
18. motorcycle and ATV engines This type of filter oil is available at motorcycle pro shops Apply 30 drops of the Traxxas filter oil evenly to the top bottom and sides of the filter element 30 total drops divided among the 3 surfaces Squeeze the filter element repeatedly to help spread the oil throughout The filter element should be evenly colored by the oil Even color indicates that the oil is distributed evenly Do not squeeze out excess oil Note Do not use the air filter oil for anything other than the air filter It is not meant to be a lubricant Reassemble the filter and install it on the engine making sure the rubber filter neck fits securely on the carburetor with no gaps or air leaks 0S5 T MAXX 3 3 23 See page 32 for more information on how air density affects engine tuning A turn refers to tightening turning in or loosening turning out mixture needles A full turn refers to turning the needle 360 so a 1 2 turn would be 180 a 1 4 turn would be 90 and so on 24 T MAXX 3 3 THE TRX 3 3 RACING ENGINE Understanding the Carburetor adjustments The carburetor performs several functions It controls the engine s speed by restricting the intake of air and fuel into the engine It atomizes the fuel suspends the fuel droplets in the air and also controls the air fuel ratio of the mixture entering the engine how much air for a given amount of fuel T
19. of the batteries Check rechargeable batteries for a full charge 0S5 T MAXX 3 3 11 a 12 Direct the battery wires through the slot in the battery cover If the wires are not properly routed they may become broken or shorted causing radio system failure and loss of control If you use rechargeable batteries in your receiver be aware that when they begin to lose their charge they lose power much more quickly than regular alkaline batteries Signs of weak receiver batteries include sluggish steering response and shortened radio range Caution Discontinue running your T Maxx 3 3 at the first sign of weak batteries to avoid losing control If the radio system doesn t appear to work when the transmitter and receiver switches are turned on check for correct battery installation as T MAXX 3 3 THE TRAXXAS TQ RADIO SYSTEM The radio receiver in your T Maxx 3 3 uses 4 AA batteries The battery holder for the receiver batteries is located underneath the battery cover The battery cover can be identified by the on off switch 1 Remove the battery cover by removing the two 3x10mm buttonhead cap screws from the cover 2 Remove the battery holder and install 4 AA alkaline batteries Make careful note of the battery polarity by comparing against the diagrams in the battery holder 4 cell battery holder 3 Insert the battery holder into the battery cover 4 Reinstall the batt
20. positions Spring rate at the wheel increases as the upper shock mounting position is moved from position A to position B Ride height is not affected by changes in the upper shock mounting position Use the chart below to see the effect of the various shock mounting positions The horizontal length of the lines indicates the amount of suspension travel The angle or slope of the lines indicates the spring rate at the wheel Wheel Force vs Wheel Travel 2 5 Lower Mount 1 Upper Mount 0 zb Lower Mount 2 Upper Mount 0 Lower Mount 1 Upper Mount A Lower Mount 4 2 Lower Mount 2 Upper Mount A 5 Lower Mount 3 Lower Mount 3 Upper Mount A R e 7 1 Lower Mount 4 Upper Mount A More Firm EC Lower Mount 2 Lower Mount 1 Upper Mount B Lower Mount 1 Lower Mount 2 Upper Mount B A 15 A Lower Mount 3 Upper Mount B E Y Lower Mount 4 Upper Mount B au g a a BAA 21 i wee A Sg 0 5 A 0 A 0 10 20 30 40 50 60 70 80 90 100 Wheel Travel mm Adjusting the Toe in Your T Maxx 3 3 comes from the factory with zero degrees of toe in in the front and one degree of toe in in the rear You can adjust the toe in on the front and rear of the truck Set the steering trim on your transmitter to neutral Next adjust your steering turnbuckles so that both front wheels are pointing straight ahead and are parallel to each o
21. see page 44 for instructions on freeing the engine The Idle Speed Adjustment The idle speed screw controls the closed position of the throttle slide When the throttle servo is in its neutral position the throttle slide should be stopped against the idle adjustment screw Always use the idle speed adjusting screw to control engine idle Do not use the throttle trim on the transmitter to adjust idle speed The idle speed should be set as low as possible and still maintain reliable running Ki See Tuning Your TRX 3 3 Racing Engine on page 31 for complete information on adjusting the air fuel mixture and idle speed Factory Needle Settings If your factory preset carburetor adjustments have been tampered with use the following settings Set the high speed needle to 4 turns out from closed Set the low speed needle so the screw head red in Fig A is flush even with the end of the slide yellow in Fig A Low Speed C Needle Adjustment Always use the factory settings for initial starting Only use these settings when the factory settings have been lost S Higher nitro requires a richer fuel mixture When running 33 fuel richen your high speed needle 3 4 turn if previously running 20 nitro and then re tune the engine for maximum performance T MAXX 3 3 25 Use the Right Charger The most convenient type of charger is an AC peak detecting charger that plugs directly into an AC wall outlet su
22. speed needle and the low speed needle The low speed needle is used to meter the fuel used by the engine at idle and low rpm part throttle engine speed The high speed needle is used to meter the fuel when the throttle is open from part throttle to wide open throttle WOT Two needles on the TRX 3 3 Racing Engine provide precise control of the air fuel ratio across the engine s entire rpm range The maximum possible fuel flow is always controlled by the high speed needle It works like the main water valve on a garden hose Turn it clockwise to close the valve counter clockwise to open it When the throttle is at idle or partially open the low speed needle meters the fuel flow at the outlet needle seat where the fuel enters the carburetor venturi This second valve acts like the spray nozzle at the end of the garden hose in our example When you accelerate from idle the throttle opens and the low speed needle is pulled away from the needle seat This allows more fuel to flow with the increased air flow As the throttle Water Valve Controls Overall Flow High Speed Needle AU gt Richen Water Nozzle Controls Fine Flow Low Speed Needle is increased the low speed needle is pulled completely away from the needle seat leaving it fully open At that point fuel metering is entirely controlled by the high speed needle Again using our water hose example when the spray nozzle at the end of our garden hose is fully o
23. stop Count the two seconds out while accelerating one thousand one one thousand two and then stop Repeat this starting and stopping procedure until the second tank of fuel is nearly empty When the fuel tank is nearly empty shut off the engine and let it cool for 15 minutes Driving procedure Gently pull the throttle trigger to 1 2 throttle over a 3 second count Then gently apply the brake to stop Count the three seconds out while accelerating one thousand one one thousand two one thousand three and then stop Repeat this starting and stopping procedure until the third tank of fuel is nearly empty 1 1 4 2 Seconds 15 Minutes 2 1 2 2 Seconds 15 Minutes 3 1 2 3 Seconds 4 Full 3 Seconds 5 Full 5 Seconds THE TRX 3 3 RACING ENGINE 2 As the engine loosens the idle speed may increase and cause the model to try to creep forward when stopped Reduce the idle speed by turning the idle adjustment see page 19 on the carburetor counterclockwise 3 When the fuel tank is nearly empty shut off the engine and refuel From here on you do not need to let the engine cool between tanks Driving procedure Gently pull the throttle trigger to full throttle over a 3 second count Then gently apply the brake to stop Count the three seconds out while accelerating one thousand one one thousand two one thousand three and then stop Repeat this starting and stopping procedure until the fourth tank of fuel is nea
24. the control unit indicates glow plug continuity The Motor LED indicates the status of the EZ Start electric starter motor The Cush Drive mechanism in the drive unit prevents damage to the gears caused by engine kickback Smart Start protection circuitry prevents damage to the motor by cutting power if the load on the motor or other electronics exceeds safe limits Installing the EZ Start Battery The EZ Start system requires a fully charged 7 2 volt rechargeable NiCad or NiMH battery pack not included Use a charger not included designed for 7 2 volt battery packs Charge the battery according to the charger manufacturer s directions 1 Press the tab in the end of the battery compartment door to open A 2 Plug a fully charged 7 2 volt battery pack into the connector inside B 3 Twist the battery 2 or 3 times to twirl the battery plug wires This helps hold the wire and battery in place when the battery is installed in the compartment C 4 Install the battery into the compartment and press the wires securely into place 5 Snap the battery compartment door back on and lock the end tab D Using the EZ Start Your EZ Start controller plugs into a 4 prong receptacle in the center of the bed on your T Maxx 3 3 When the red button on the controller is pressed the EZ Start motor begins to spin the engine and power from the control unit heats the glow plug Assuming all settings an
25. to six models can be operated simultaneously Each channel is referred to by its flag color and channel number as shown below CHANNEL FREQUENCY FLAG TRAXXAS BAND COLOR PART No AA 1 26 995 BROWN 2031 D ed 2 27 045 RED 2032 ad 3 27 095 ORANGE 2033 S 4 27 145 YELLOW 2034 PA 5 27 195 GREEN 2035 ed e 27 255 BLUE 2036 Clearing your frequency A routine verbal check to make sure nobody else in your area is operating on the same channel Always clear your frequency by calling out your channel number before operating your model Wait or move to another area if your channel is already being used Crystal X tal The plug in device that determines which channel the radio system will operate on For each channel there are two crystals one for the receiver and one for the transmitter Of those two crystals the one marked RX with the lower number 455 MHz lower must be inserted into the receiver Frequency band The radio frequency used by the transmitter to send signals to your T Maxx 3 3 All Traxxas RTR models operate on a 27 MHz frequency band mAh Abbreviation for milliamp hour Measure of the capacity of the battery pack The higher the number the longer the battery will last between recharges Neutral position The standing position that the servos seek when the transmitter controls are at the neutral setting NiCad Abbreviation for nickel cadmium The original rechargeable hobby pack NiCad batteries have very
26. 1 Weather conditions 33 Wheelie Bar 6 installation 40 setup 40 Wiring diagram 9 WOT 21 Ai 1 j OWNERS MANUAL NO A SE 4 O NS SC ES O PX RO y f a z E MODEL 4909 gt KONG TO Ce NS R EN y d S bA Kar be TOO KLEIN ROAD PLANO TEXAS 75074 1 888 TRAXXAS 051216
27. 3 3 is very fast and by tanks 4 and 5 you will need plenty of room for the truck to run in Apply all throttle and braking actions gently Abrupt acceleration or braking could cause the engine to stall unnecessarily Special break in fuels are not recommended Use the same fuel you plan to use everyday If possible avoid breaking in the engine on extremely hot or cold days see page 30 Pay careful attention to the fuel level Do not allow the fuel tank to run completely empty An extremely low fuel level causes the mixture to run too lean This could result in a burned glow plug or extremely high engine temperatures Do not attempt to break in the TRX 3 3 Racing Engine by idling it on a stand This will produce poor results Keep extra Traxxas glow plugs handy The break in process can cause deposits to form on the plug leading to plug failure Change or clean your air filter after break in Follow the instructions exactly for each of the first 5 tanks of fuel Starting Your TRX 3 3 Racing Engine for the First Time Before you start your TRX 3 3 Racing Engine for the first time make sure you have read all instructions and precautions in this manual Pay close attention to the tank by tank break in instructions in the next section and make sure you have read and understood them before you run your engine Your engine must be at room temperature 70 F or 21 C or above the first time you start it If it s
28. Charger Part 3030X is a peak detecting unit that will charge the RX Power Pack Part 3036 flat pack or 3037 hump pack in about one hour The peak detection circuitry automatically shuts off the charger when the maximum charge has been achieved The TRX Power Charger also includes a 7 2V adapter for charging 7 2V EZ Start batteries The TRX Power Charger can operate on either AC or DC power A special wiring harness for T Maxx Traxxas part 3034 that includes a handy external charging jack is required The optional DC car adapter Part 3032 features a tangle free extra long wire and integrated fuse The long charging cord allows the model to remain outside the car while charging Caution Never charge batteries in an enclosed car interior or while driving Never leave charging batteries unattended Monitor them closely Traxxas integrated TRX Power System is the easiest way to add the power and economy of rechargeable batteries to your T Maxx 3 3 Consult your hobby dealer for purchasing information J 1E IN Locate the black antenna wire that exits the top of the receiver box Pull the wire straight with your fingers and then insert the end of the wire into one end of the antenna tube the antenna tube tip crimp nut and sleeve are located in the documents bag Push the wire all the way through the antenna tube Insert the base of the tube into the antenna post Take care not to crimp the antenna wire Slide th
29. EK Di KZ Di KZ Filling the Fuel Tank Use a fuel dispensing bottle Traxxas Top Fueler part 5001 to put fuel into the T Maxx s fuel tank To fill the fuel bottle squeeze the air out insert the dispenser tip into the fuel can and release your grip on the bottle As the bottle expands fuel will be drawn into it To fill your model flip up the spring loaded cap on the fuel tank insert the tip of the fuel bottle and squeeze to dispense the fuel Fill the tank until the fuel level reaches the base of the filler neck Close the fuel tank lid making sure it closes tightly Fuel Tank Seal Adjustment The rubber seal on the fuel tank is important to the function of the engine The fuel tank is pressurized by the exhaust system to provide reliable fuel flow If the tank lid does not seal properly an air leak will be created that can cause your engine to run erratically and be difficult to start If necessary the rubber O ring tank seal can be adjusted for improved sealing by tightening the screw on the underside of the tank lid The TRX 3 3 Racing Engine air filter is specifically designed to deliver maximum performance while protecting your engine from dust and dirt Use only the supplied filter You will not improve engine performance by switching to an aftermarket filter and you may risk engine damage due to poor filtration The TRX 3 3 Racing Engine air filter assembly consists of 3 pieces 1 A rubber filter base 2 Aplas
30. Standard 2nd 14 69 15 24 15 78 16T 40T 1st 21 18 21 97 22 75 Close 2nd 16 01 16 60 17 20 18T 38T 1st 21 18 21 97 22 75 Wide 2nd 13 52 14 02 14 52 stock configuration out of the box T MAXX 3 3 39 40 e T MAXX 3 3 TUNING ADJUSTMENTS Wheelie Bar Installation The Maxx Wheelie Bar can be used on any Maxx truck with the stock rear skid plate rear bumper and rear bumper mounts It is also compatible with the Traxxas accessory aluminum rear bumper Part 4935X The wheelie bar is intended for use on hard high traction surfaces such as pavement where controlling wheelies can be difficult It is easily removed for off road racing or jumping 1 Slowly bend the end of the skid plate downward and then key the skid plate into the slot of the wheelie bar 2 Slide the wheelie bar down to the bottom of the skid plate and then snap the clip over the lower bumper tube 3 Removal is opposite of installation Snap the wheelie bar off of the bumper and then slide the wheelie bar off of the skid plate Wheelie Bar Setup Instructions Changing the position of the wheelie pa bar height setting is easier when the Position wheelie bar is installed on the truck Clos Bats Snap the upper arms off of the Se wheelie position cross bars Move the AS upper arms to the desired wheelie position cross bar and then snap them in place Each setting can offer different results based on the individual ride height and dr
31. T MAXX 3 3 19 20 e T MAXX 3 3 THE TRX 3 3 RACING ENGINE You ll find these Nitro R C engine terms throughout this section of the manual 15 15 or 15 refers to the displacement of the engine The TRX 2 5 Racing Engine is 15 cubic inches or 2 5 cubic centimeters cc The name TRX 2 5 is derived from the cc measurement 20 20 or 20 refers to the size of the engine The TRX 3 3 is 20 cubic inches or 3 3 cubic centimeters cc The name TRX 3 3 is derived from the cc measurement ABC Abbreviation for aluminum brass and chrome Refers to engine construction that consists of an aluminum piston that slides in a chrome plated brass sleeve The TRX 3 3 uses ABC construction Air filter The air filter sits atop the carburetor and prevents harmful dust and dirt from entering the engine Dirt ingestion is the number one cause of premature engine failure so the engine should never be run without the air filter in place BDC Bottom dead center The bottom most position of the engine piston stroke Break in Break in is the procedure for running a brand new engine according to specific instructions This correctly prepares the engine for normal running The break in procedure can be different for different makes of engines Follow the Traxxas directions for break in exactly Carb Abbreviation for carburetor Carburetor The carburetor atomizes mixes the fuel with the air so that the engine can b
32. anger THE TRX 3 3 RACING ENGINE 3 There is a sudden loss of power during acceleration Danger H 4 The engine begins to overheat Symptoms of overheating include 9 g y ymp y ee When tuning for Steam or smoke coming from the engine not exhaust performance watch closely Hesitation or stalling during acceleration to notice when there is no opping or clattering sound when decelerating detonation SE mapez P Fluctuating idle speed high speed mixture is lean Temperature measurement above 270 F at the glow plug If you lean Se ee A temperature reading above 270 alone does not necessarily tureto EOL atte ae engine cuts out hesitates indicate overheating Look for other symptoms of overheating or stalls you are well into combined with temperature for a more accurate warning the danger zone and engine e e damage is likely Bichen the Richen the fuel mixture to the optimum setting by richening the high Hightepeedinccdion can speed needle at least 1 8 turn counterclockwise and retest This setting and retune will extend engine component life 0 e e High Speed Power Loss For your convenience the Overheating low speed needle has a LEAN positive stop that prevents itfrom being over tightened and damaging the needle Cutting out stalling gt and seat This also provides Optimum RACING an e way ene ae many turns out from close j Si eg the low speed needle EVERYDAY adjustment
33. are not able to turn the engine by hand the engine could be flooded there could be binding in the clutch system or there could be internal engine damage Note It is normal for the engine to be extremely tight and hard to turn when the piston reaches the top of the compression stroke Itis possible that the factory adjusted break in settings on your carburetor are too rich for your geographic location atmospheric conditions or fuel brand Extremes in temperature humidity barometric pressure and altitude can t always be accounted for with a single high speed needle setting The symptoms described above can occur when the air density is very low such as in high mountainous elevations and extremely cold temperatures Under these conditions lean the fuel mixture slightly 1 8 turn to see if there is any improvement in starting and idling Only lean the fuel mixture just until the engine will run and idle reliably and then proceed with the break in The contents of different brands of fuel other than Traxxas Top Fuel in combination with extreme atmospheric conditions can also make the factory preset break in settings too rich and cause the symptoms described above Again try leaning the fuel mixture slightly 1 8 turn to see if there is any improvement in starting and idling If the engine is spinning but will not start first check to make sure that both the motor and glow plug LEDs on the EZ Start controller light when the button is
34. ation of the throttle servo When the throttle trigger is pulled back the carburetor should open slide moves out When the throttle trigger is pushed all the way forward the brake should lock THE TRAXXAS TQ 3 RADIO SYSTEM Operate the shift button on the transmitter and check for rapid operation of the shifting servo Push the shift button down for forward The servo will operate the spring loaded shift mechanism and you will hear the transmission click into forward Push the shift button up for reverse and you will again hear the transmission click and shift into gear Once adjustments are made turn off the receiver on your T Maxx 3 3 followed by the hand held transmitter Before each running session with your T Maxx 3 3 you should range test your radio system to ensure that it operates properly 1 Turn on the radio system and check its operation as described in the previous section Using the TQ 3 Radio System Have a friend hold the model with the engine off Make sure your transmitter antenna is fully extended and then walk away from the model with the transmitter until you reach the farthest distance you plan to operate the model Operate the controls on the transmitter once again to be sure that the model responds correctly y em A Keng j A E Throttle Brake Servo Do not attempt to operate the model if there is any problem with the radio system or any external interference with your radio si
35. aust gases to exit The shape and location of the ports are a large factor in controlling the engine timing and power output Priming Manually causing fuel to move from the fuel tank up to the carburetor This is sometimes necessary after the engine has been sitting for a long period of time and all of the fuel has drained back to the tank On a Traxxas model this is done by holding your finger over the exhaust tip for one or two seconds while the engine is starting Punch A term that refers to how quickly the model responds to throttle input or how quickly it accelerates Rich A running condition where the engine is getting too much fuel for the available air It is better to run an engine slightly rich to increase engine life Excessively rich mixtures cause the engine to have sluggish performance with exaggerated blue smoke and unburned fuel coming from the exhaust rpm Abbreviation for revolutions per minute how many times the engine crankshaft spins in a minute Sleeve Internal engine part that contains the piston The precise fit between the sleeve and the piston creates a seal that allows engine to have the required compression for combustion The sleeve in a TRX engine is made of brass and is then hard chrome plated Slide carburetor The throttle on a slide carburetor closes and opens by sliding a barrel in and out of the carburetor body This type of carburetor is preferred for performance use because it provides a less res
36. ch as the TRX Power Charger part 3030X see page 12 for more info It contains special peak detection circuitry that automatically shuts the charger off when the battery is fully charged If you re using a 15 minute timed charger always fully discharge the battery pack before each charge Some high mAh battery packs 1500 mAh or higher require more than the standard 15 minutes of charge time If the battery pack is cold after 15 minutes of charging add another 5 minutes of charge time Closely monitor the battery pack and stop charging it when it begins to feel warm to the touch Never leave a battery charging unattended Always follow charger manufacturer s instructions Inexpensive overnight wall chargers may also be used as 26 e T MAXX 3 3 THE TRX 3 3 RACING ENGINE The Traxxas EZ Start brings the convenience of push button electric engine starting to your T Maxx 3 3 The EZ Start consists of a hand held control unit and an on board motorized starter Power for the EZ Start system comes from a 7 2 volt rechargeable battery pack installed in the hand held control unit battery not included The engine glow plug is heated automatically by the EZ Start system eliminating the need to keep up with a separate glow plug igniter The voltage to the glow plug is kept constant regardless of the load placed on the starter by the starter motor The Glow Plug LED light emitting diode on
37. ckwise to increase it The idle speed should be set as low as load up with fuel and 4 Ifthe engine shuts off immediately without speeding up then richen possible while still maintaining reliable running characteristics give you an inaccurate the low speed needle 1 8 turn make several more high speed runs 3 Reset the throttle trim on the transmitter to its original position measurement from your and retest pinch test When the low speed needle is set correctly the engine s throttle J response should be very quick even to the point of making it difficult to d i i an keep T Maxx 3 3 from doing a wheelie when you accelerate richer fuel mixture When running 33 fuel richen your high speed needle 3 4 Fuel Mixture Adjustment Chart turn if previously running 20 nitro and then re tune the engine for maximum arn a r E performance See page 22 Humidity Lower Slightly more dense Slightly richer for more information Higher Slightly less dense Slightly leaner Pressure barometer Lower Less dense Leaner Higher More dense Richer Temperature Lower More dense Richer Higher Less dense Leaner Altitude Lower More dense Richer Higher Less dense Leaner Nitro Lower Leaner Higher Richer 32 T MAXX 3 3 Fine Tuning the Carburetor After fine tuning your TRX 3 3 Racing Engine at the end of the break in procedure no major adjustments to the fuel mixture are usually necessary Make note of the temperature humidity and barometric pressure
38. cooler than room temperature outside remove all fuel and keep your T Maxx 3 3 indoors until you re ready to start it and then take it outside If it s colder than 45 degrees special considerations should be made See cold weather break in on page 30 We do not recommend running the model in temperatures below 35 degrees 1 Turn on the radio system see page 16 2 Make sure the throttle trigger on the transmitter is in the idle neutral position 3 Connect the EZ Start controller according to the instructions on page 27 4 Press the starter button in short two second bursts and watch for fuel moving through the fuel line up to the carburetor Watch closely The fuel moves very fast If the fuel doesn t move through the line within 5 seconds prime the engine by briefly one or two seconds covering the exhaust outlet with your finger until the fuel is just visible in the carburetor fuel line Watch carefully If the engine is primed too long it will flood with fuel and stop turning 5 Once fuel reaches the carburetor the engine should quickly start and idle 6 Disconnect the EZ Start controller from the model 7 Proceed with the engine break in 8 Do not rev your engine with no load wheels off the ground If your engine doesn t start refer to the troubleshooting tips beginning on page 43 or go online to www traxxas com support If your factory fuel mixture settings have been altered refer to page 25 If you still ha
39. d preparations are correct the engine should start almost immediately Each of the two status indicator LEDs on the hand held control unit the Motor LED and the Glow Plug LED should light green while starting If either LED fails to light while starting there is a fault indicated with that function 8 If the Glow Plug LED fails to light the glow plug may be bad or the glow plug wire may be damaged or disconnected 8 If the Motor LED fails to light and the starter fails to operate then the EZ Start is in protection mode Protection Mode The EZ Start uses Smart Start technology to monitor the condition of the system and detect failures The controller monitors the load being placed on the EZ Start motor If the load becomes excessive the system shuts off power to the motor to prevent costly damage to the motor and the controller This may occur for example if the engine floods with fuel during starting The starter spins at first but when excessive fuel in the combustion chamber begins to lock up the engine the starter motor slows under the heavier load This causes the protection circuit to shut THE TRX 3 3 RACING ENGINE off the power to the motor Allow at least 3 minutes for the starter motor to cool and the circuit to automatically reset before continuing Use the time to find and eliminate the condition that caused the excessive load on the starter motor When the EZ Start controller is in protection mode
40. dio range If the radio range appears short then first check to make sure the transmitter antenna is fully extended and that the antenna in the T Maxx 3 3 is in place and has not been cut or damaged Next make sure the batteries are all fresh or fully charged Finally if you are still experiencing short range try a different location Sometimes there can be interference from various sources that can cause your radio to malfunction Engine will not spin EZ Start will not turn the engine If neither LED on the controller lights the EZ Start battery could be discharged or improperly connected Inspect and recharge if necessary If the glow plug LED lights and the motor LED does not then the EZ Start controller is in protection mode Allow the controller to cool for at least three minutes The circuitry should automatically reset Check to make sure the wires are connected to the EZ Start motor in the T Maxx 3 3 The red wire should connect to the positive motor terminal indicated by a red dot next to the terminal The engine could be flooded If too much fuel accumulates in the combustion chamber at start up the engine will hydraulically lock Follow the procedure on page 44 for clearing a flooded engine Pi KE Engine extremely sluggish hard to start and will not idle during tank 1 of the break in Pi ZS Engine spins but will not start Pi e 0 Check for binding at the engine flywheel If you
41. dy windshield and front valance In some situations the engine may perform very well with no stalling lagging or hesitation at temperatures above 270 F particularly in very hot climates If richening the fuel mixture to bring the temperature down to 270 F results in poor sluggish performance engine never cleans out then return the engine back to a satisfactory state of tune based on how it sounds and performs always with a visible stream of blue smoke coming from the exhaust If engine temperature is exceeding 270 F with proper cooling and no signs of abnormal running then avoid running the engine at its maximum lean setting Watch closely for any signs of overheating Richen the fuel mixture slightly to provide a safety margin of additional cooling lubrication Symptoms of overheating include Steam or smoke coming from the engine not exhaust Hesitation or stalling during acceleration Popping or clattering sound when decelerating detonation Fluctuating idle speed T MAXX 3 3 33 DRIVING YOUR T MAxXx 3 3 Forward and Reverse Operation Forward and reverse gears are selected with the shift button located in the transmitter handle grip The switch is normally in the down or forward position Your TRX 3 3 Racing Engine is broken in the fuel mixture is balanced and the idle is set now it s time to have some fun This section contains instructions on making adjustments to your T Maxx 3 3 Before y
42. e crimp nut over the antenna tube and screw it onto the antenna post Use the supplied tool to tighten the crimp nut on the post just until the antenna tube is securely in place Do not over tighten or crush the antenna wire against the receiver box Fold the top of the antenna wire over the top of the antenna tube Slide the antenna sleeve over the tube to retain the antenna wire Now slide the antenna tip onto the top of the antenna tube Never cut or shorten the antenna wire On the transmitter always fully extend the telescoping antenna when running your T Maxx 3 3 Make a habit of holding the transmitter so the antenna points straight up THE TRAXXAS TQ 3 RADIO SYSTEM Antenna Tip Antenna Sleeve Antenna Tube Antenna Wrench Antenna Crimp Nut Antenna Post Spray a little window cleaner on the antenna wire to make it easier to push through the antenna tube Don t shorten the length of the antenna wire Its length is tuned to the frequency band cutting it could severely shorten the radio system s range Don t push the transmitter antenna down from the top Pull it down from the bottom one segment at a time to prevent binding and kinking the antenna mast 05 T MAXX 3 3 13 14 T MAXX 3 3 THE TRAXXAS TQ 3 RADIO SYSTEM Accelerate es In addition to the electronic throttle and steering trim controls your radio system features throttle neutral adjustment and
43. e engine is operated under warmer running conditions Warm the engine to approximately room temperature by removing all fuel and storing the vehicle inside at room temperature until just before starting the engine An extremely cold engine can become difficult to start After the engine is running it is important to keep the temperature of the engine up around 200 to 215 degrees during break in In weather below 45 degrees the TRX 3 3 Racing Engine will tend to run at lower temperatures between 160 to 180 degrees when tuned at proper break in mixture settings This is too cool for break in Do not lean the fuel mixture to increase engine temperature This will also decrease lubrication and cause your piston sleeve to wear prematurely Wrap the cooling head with a paper towel clean rag or sock to help keep the engine running around the recommended 200 to 215 break in temp If too much heat is contained the engine can actually run too hot Make sure that you monitor the engine s temp closely for the first couple of tanks until you get the right amount of cover for the cooling head This will of course depend on your current weather conditions Adjusting the cover up and down exposing more or fewer cooling fins is a convenient way to regulate engine temps For owners that do not have access to a temperature probe a drop of water on the cooling head around the glow plug area should slowly sizzle for approximately 6
44. e the glow plug reconnect the glow plug power wire and reinstall the air filter The following section addresses some very basic engine and radio questions you may have about your T Maxx 3 3 Most questions arise from simple user errors or minor adjustments that are easy to correct If you can t find a solution for your T Maxx 3 3 here then visit our Web site at www Traxxas com support There you will find a much more extensive and detailed online troubleshooting area In addition you may call Traxxas Customer Service at 1 888 TRAXXAS outside the U S call 972 265 8000 Radio system does not work properly If the power light on the transmitter does not come on check for proper battery installation and that the batteries are new and or fully charged If the power light is blinking then the transmitter batteries are weak and should be replaced See page 11 for more details 8 If the transmitter light is on but the radio is still not responding check for proper installation of the receiver batteries and that the batteries are new and or fully charged Check to make sure the on off switch on the model is in the on position Finally if there is still no response check the red and black wires that connect the battery pack to the batt terminal on the receiver you will have to remove the receiver cover Make sure the wires are not pinched or damaged and that the plug is secure in the receiver See page 12 for more details Short ra
45. ed in this safe and fun for you and those around you Failure to operate your manual should be strictly T Maxx 3 3 in a safe and responsible manner may result in property Never operate your T Maxx 3 3 in crowds of people or busy followed to ensure safe damage and serious injury The precautions outlined in this manual W operation of your T Maxx 3 3 pedestrian areas T Maxx 3 3 is very fast and could cause injury to Do not operate your T Maxx 3 3 at night or anytime your line of sight to the model may be obstructed or impaired in any way should be strictly followed to help ensure safe operation You alone a those unaware of its presence Keep small children at a safe distance must see that the instructions are followed and the precautions are away from the operating area adhered to T Maxx 3 3 is not intended AE Because T Maxx 3 3 is controlled by radio it is subject to radio for SE WC E 16 l interference from many sources beyond your control Since radio years of age without the ee sae interference can cause momentary loss of control always allow a supervision of a responsible S T Maxx 3 3 is very fast The T Maxx 3 3 is intended for experienced safety margin in all directions tae dels a and knowledgeable adult users with a high level of skill The TRX 3 3 Racing Engine is extremely y y Se SS SE collisions powerful and may require skilled driving to maintain control Children under 16 years of age a
46. een AE FUNC ON twice and then release the button immediately You are now in programming mode x2 4 Pull the transmitter throttle i trigger to the full throttle CHANNEL SERVO S NS back to their default settings 1 STEERING position Hold it there until the de ds and re program the OptiDrive 2 THROTTLE AND BRACING Function LED flashes green pt x Module For programming with three times Note The throttle aftermarket radio systems 2 Sr W I please see our website servo will not move during programming even though it is connected to the controller OptiDrive Operation pa km i Green Function Programming the OptiDrive ESM 5 Release the transmitter throttle Shift allowed The OptiDrive ESM electronically monitors trigger allowing it to return to e gt hicl dnd Isf dand i Em e Red flashing Function vel ic e spee an contro s orwar an reverse neutral The Function LED will d dE Low battery see pg 12 shifting Controlling the shift action electronically turn solid green indicating that Deg Si FUNG Ion eds A A e Red Sensor rather than by mechanical systems reduces the the shifting servo is OK to shift D EE number of components in the transmission The and the programming has been completed The controller is now SENSOR circuit is broken Possible transmission weighs less there is lower programmed and ready to go disconnected or broken sensor throttle or shift wires Possible rota
47. engine See page 28 Learn to use the correct starting procedure for your TRX 3 3 14 Break in your engine See page 28 Follow the break in instructions exactly to ensure the best performing longest lasting engine 15 Tune your engine See page 31 Learn how to set the fuel mixture needles for optimum engine performance 16 Drive your T Maxx 3 3 See page 34 Learn to use the two speed and reverse functions on your truck along with important driving precautions 17 Maintaining your Truck See pages 41 42 Follow these critical steps to maintain the performance of your T Maxx 3 3 and keep it in excellent running condition Look for the Quick Start logo at the bottom of Quick Start pages as sold separately T MAXX 3 3 7 GLUING THE TIRES AND DECORATING YOUR T MAx Always wear safety glasses The factory tires on your T Maxx 3 3 are already glued to the rims The The main decals have already been to prevent glue from tires must be glued to the rims to prevent the rims from spinning inside applied to your T Maxx 3 3 The extra splattering into your eyes the tires The instructions here are provided to show you how to glue decals provided are die cut for easy S replacement tires to the rims in the future Use CA tire glue available removal Use a hobby knife to lift the from your local hobby dealer You can glue the tires without removing corner of a decal and remove it from The acetone in fingernail the wheels
48. engineering and rigorous testing have yielded unprecedented power and uncompromising performance that turns ready to run into Ready To Race The TRX 3 3 Racing Engine takes a total system approach Each part of the engine from the air filter to the exhaust tip is carefully engineered to work in harmony with other engine components Each part complements the next to extract maximum power The TRX 3 3 Racing Engine is designed to be tolerant of variations in tuning and to run successfully through a wide range of variable atmospheric conditions such as changes in temperature humidity and altitude In order to get the longest engine life and keep the TRX 3 3 Racing Engine in top running condition it is very important to perform regular routine maintenance The number one cause of premature engine wear and failure is lack of care and maintenance The TRX 3 3 Racing Engine is manufactured to exacting tolerances and requires a specially designed break in procedure to accomplish the final precision fitting of the internal engine components It is very important that you follow the new break in procedure as closely as possible to achieve the best performance and longest life from your TRX 3 3 Racing Engine Engine break in will take between one and two hours Old style break in procedures such as idling the engine on the bench for several tanks of fuel or simply running the engine with a very rich fuel mixture for the first 4 tanks of fuel will no
49. ery cover and secure with the screws see sidebar To prevent losing control of your model it is important to stop at the first sign of weak receiver batteries Visible warning signals include sluggish steering response and shortened radio range In addition the Optidrive is equipped with a low voltage indicator and a failsafe circuit When the O SENSOR FUNC ION voltage of the receiver batteries drops below 4 3 volts the Function LED on the OptiDrive will flash red If the voltage drops below 4 3 volts for more than 2 seconds the OptiDrive ignores throttle and shift signals and applies 25 brakes failsafe mode Steering will still be operational and the Function LED on the OptiDrive will flash red The OptiDrive will stay in failsafe mode until the power is turned off or the receiver battery voltage rises above 4 3 volts for more than 2 seconds Anytime the Function LED flashes red it is time to stop and install new batteries or recharge your battery pack if equipped Do not try to continue running your model with weak receiver batteries on board Traxxas TRX Power System optional The optional Traxxas TRX Power System can be purchased separately to power the radio system in the T Maxx 3 3 Benefits include the economy of a rechargeable 5 cell nickel metal hydride NiMH battery pack that replaces AA alkaline batteries and increased voltage for dramatically improved servo performance The TRX Power
50. eves connecting rods and wrist pins reciprocating assemblies It could be more economical for you to continue to use your good bearings and crankshafts and simply replace the reciprocating assembly as needed Engine assembly is not difficult and replacing the reciprocating assembly does not require any special tools or skills Perform after run maintenance on the engine This clears the engine of destructive moisture and other corrosive deposits See page 42 for after run ei Piston sleeve The life of the piston and sleeve will vary greatly with how the engine was used and maintained The piston and sleeve should be replaced when they no longer seal effectively loss Inspect the gears for wear broken teeth or debris lodged of compression Symptoms include the engine between the teeth being difficult to start when warm stalling when warm and stalling when throttle is suddenly closed Inspect the vehicle for obvious damage or wear Look for to idle Replace the wrist pin and G clip whenever 1 Loose or missing screws the piston and sleeve are replaced 2 Cracked bent or damaged parts 3 Cut or loose wiring 4 Cut or kinked fuel lines 5 Signs of fuel leakage maintenance procedures ei Ki 0S T MAXX 3 3 41 Denatured alcohol available from home centers and paint supply stores in a spray bottle is an extremely effective cleaner Be sure to wear safety glasses and gloves when work
51. front of the transmitter Set the THROTTLE NEUTRAL switch to the 50 50 setting y next to the on off switch Moving a switch reverses the direction of the Set the THROTTLE TRIM to the center 0 setting then adjust the deed corresponding servo Each switch corresponds to a channel as shown throttle linkage until the carburetor closes linkage may require re setting below For example if you turn the steering wheel to the right and your Set the CHANNEL 2 SERVO REVERSING SWITCH to the right position the OptiDrive to maintain front wheels turn left you would move the channel 1 switch to correct Set the CHANNEL 3 SERVO REVERSING SWITCH to the right position proper shifting action DO NOT change the position of any of the servo reversing switches after programming the OptiDrive If settings were changed after programming the OptiDrive it will have to be reprogrammed the servo direction It may be necessary to adjust the corresponding trim control after moving a switch The default position for the servo reversing switches is shown For transmission durability the OptiDrive ESM limits the model s reverse speed to about 70 of full throttle If settings are changed and you notice a decrease in forward top speed you could have the OptiDrive system reversed Return the TQ 3 servo reversing switches for channels two and three 3 With the throttle at neutral press and hold the SET button until the Function LED flashes gr
52. ghtly rich at that setting and you can then retune for performance Always tune for performance by starting rich and moving leaner toward the ideal setting Never try to tune from the lean side There should always be a light stream of blue smoke coming from the exhaust Before you begin tuning the engine should be warmed up to its normal operating temperature and running slightly rich All final tuning adjustments must be made to the engine at its normal operating temperature You can tell the engine is running rich by noting any of the following Sluggish acceleration with blue smoke coming from the exhaust T Maxx 3 3 may not shift into second gear There is unburned fuel spraying from the exhaust tip Leaning the high speed fuel mixture increases performance e O O High Speed Fuel Mixture Adjustment With the engine warm and running at a rich setting gradually lean the high speed fuel mixture in 1 16 turn increments Make several high speed passes after each adjustment to clear out the engine and note any change in performance The TRX 3 3 is extremely powerful Remember to apply the throttle gradually to prevent wheelies or loss of control Continue this procedure until there is no longer any performance improvement If any one of the following conditions occurs the fuel mixture is already past the maximum safe lean setting 1 There is no longer any performance improvement 2 The engine begins to cut out at high speed D
53. gine excessively with no load on the engine This practice could result in internal 05 gt 34 T MAXX 3 3 engine damage Avoid over revving the engine when T Maxx 3 3 is airborne after a jump Avoid excessive high speed running for extended periods of time or over long distances This could cause the engine to build up enough speed to exceed maximum safe rpm limits Don t drive your T Maxx 3 3 with drive train damage of any kind The engine could be damaged due to overloads caused by drivetrain friction or over revving caused by loose or missing parts Don t tow anything with your T Maxx 3 3 The engine is cooled by airflow created by speed Towing creates a high load on the engine and at the same time limits cooling of the engine due to low vehicle speed If your T Maxx 3 3 gets stuck stop driving immediately Move the vehicle and then continue driving Never turn off the radio system while the engine is running The truck could run out of control approach turns and then apply moderate throttle through the turns This technique will help T Maxx 3 3 grab the surface and turn sharper Do not apply brakes and turn the wheel at the same time You could tip the truck over When jumping apply some throttle while T Maxx 3 3 is in the air to keep the truck s nose up and land level on all 4 wheels Be careful not to over rev the engine or land at full throttle Either could seriously damage your T Maxx 3 3
54. gnal at your location gt KL e r Shifting Servo Steering Servo T Maxx 3 3 Z Servo Operation E When the engine is running don t use the throttle trim on the transmitter to adjust the engine idle speed Instead use the idle speed adjustment on the carburetor Do not use the throttle trim as an idle up function for starting or you could affect the OptiDrive programming Don t attempt to operate your T Maxx 3 3 if there are any problems with your radio system or radio interference at your location T MAXX 3 3 17 ei Traxxas strongly discourages changing or modifying any part of the TRX 3 3 Racing Engine Old tech tips and tricks that may have boosted the power of other engines could seriously diminish the performance of the TRX 3 3 Racing Engine There s more advanced thinking development and testing in the stock parts of your TRX 3 3 Racing Engine than in many aftermarket manufacturer s performance parts The TRX 3 3 Racing Engine is already the most powerful engine in its class and may not benefit from average low tech aftermarket bolt on performance items 18 e T MAXX 3 3 THE TRX 3 3 RACING ENGINE The TRX 3 3 Racing Engine is the next generation of TRX nitro power The larger displacement and advanced porting generate class leading horsepower while still maintaining the TRX Racing Engine characteristics of broad linear power delivery and ease of tuning Focused
55. he engine was used For example if the engine was allowed to ingest dirt from lack of air filter maintenance or running through water then the internal engine components could wear out extremely fast Glow plug may have failed If using an EZ Start check to see if the glow plug light is on during starting If not replace the glow plug If using a glow ignitor remove and check the glow plug Engine performance sluggish Engine performance depends mostly on the fuel mixture settings and how they compensate for the current atmospheric conditions Before you suspect other failures with the engine richen the high speed needle at least 1 4 turn and then retune the engine for performance see page 31 e If the fuel mixture seems to be set correctly make sure the fuel is fresh If the fuel is old or was left uncapped for a long period then some of the important fuel components could have evaporated Try new fresh Traxxas Top Fuel amp Try a new Traxxas glow plug Sometimes a glow plug will work well enough to start the engine but not be able to deliver the engine s full performance potential Check to make sure there is no binding in the driveline that would cause excessive loads on the engine Clearing a Flooded Engine If the engine is primed for too long during startup then it can become flooded with fuel When the engine is flooded it will no longer turn due to excess fuel in the combustion chamber preventing upward m
56. hich is 100 certified for use in Traxxas engines Traxxas Top Fuel is made with just the right balance of the highest grade natural and synthetic lubricants to allow excellent throttle response and the best top end performance without sacrificing long term durability 8 All of the components in the fuel are carefully selected from the best materials available and then custom blended to match the metallurgy and temperature characteristics of Traxxas engines You may use 10 20 or 33 nitro content fuel Try to use the same percentage all the time avoid switching back and forth between fuels We recommend that if you break in your engine on 20 fuel that you stick with that percentage If you do move to a higher or lower percentage make sure you readjust your fuel mixture to compensate see below Choosing a Nitro Percentage A commonly asked question is what is the difference between 10 20 and 33 fuels Increasing the nitro in the fuel is almost like adding extra oxygen to the combustion process It burns more efficiently improves combustion and delivers more power When increased nitro is used more of the other fuel components are then required inside the combustion chamber to maintain the perfect air fuel ratio Therefore overall fuel mixtures need to be richened slightly on the high speed needle about 3 4 of a turn counterclockwise when changing from 20 to 33 about 1 2 of a turn counterclockwise when changing from 10 t
57. high current handling high capacity and can last up to 1000 charging cycles Good charging procedures are required to reduce the possibility of developing a memory effect and shortened run times NiMH Abbreviation for nickel metal hydride Rechargeable NiMH batteries offer high current handling and much greater resistance to the memory effect NiMH batteries generally allow higher capacity than NiCad batteries They can last up to 500 charge cycles A peak charger designed for NiMH batteries is required for optimal performance Receiver The radio unit inside your T Maxx 3 3 that receives signals from the transmitter and relays them to the servos RX Pack RX is acommon abbreviation for the radio receiver and items associated with it RX Pack denotes the optional rechargeable battery pack used to power the radio system in the model It is available as Traxxas part number 3037 Servos Small motor units in your T Maxx 3 3 that operate the throttle and steering mechanisms Three channel radio system The TQ 3 radio system consisting of the receiver the transmitter and the servos The system uses three channels one to operate the throttle one to shift the transmission and one to operate the steering Transmitter The hand held radio unit that sends throttle and steering instructions to your T Maxx 3 3 Trim The fine tuning adjustment of the neutral position of the servos made by turning the throttle and steeri
58. in the idle position You may have to pinch the fuel line closed for several seconds before the engine stops 2 Completely empty the fuel tank Use your fuel dispensing bottle to suck out the old fuel Do not mix the old fuel with your fresh fuel supply If you leave fuel in the tank transporting or handling your T Maxx 3 3 may cause fuel to run into the engine 3 With the fuel tank empty and the throttle at the idle position try to start the engine The engine will most likely start and run for a few seconds as it uses up any fuel remaining in the engine and fuel lines 4 Once the engine stops clean the outside of the engine with compressed air or spray motor cleaner Once the engine is clean and dry remove the glow plug power wire glow plug and air filter 5 Open the throttle fully and spray a one second burst of WD 40 into the carburetor and into the glow plug hole Caution Wear safety glasses to prevent spray from getting into your eyes If you are using after run oil follow the manufacturer s instructions 6 Place a rag or paper towel over the engine to catch any WD 40 or after run oil that may come out the carburetor or glow plug hole 10 Connect the EZ Start controller to the model and spin the engine for 10 seconds Remove the rag or paper towel and repeat steps 5 7 two more times Clean and re oil the air filter so it will be ready for use next time See page 23 for air filter maintenance instructions Replac
59. ing with denatured alcohol H Be sure to follow proper maintenance and storage procedures to avoid damage to your engine and other components of your T Maxx 3 3 H Don t put the fuel from your tank back into your fuel jug Dispose of it properly following city or county regulations H Always wear eye protection when using compressed air or spray cleaners and lubricants 42 e T MAXX 3 3 MAINTAINING AND STORING YOUR T MAxx 3 3 After run Procedure You must perform after run maintenance on your TRX 3 3 Racing Engine whenever the model will be stored for longer than a few hours Taking the time to prepare your engine for storage will reward you with longer engine life easier starting and better performance When a nitro engine is shut off some excess unburned fuel remains in the engine The methanol in model engine fuel is hygroscopic which means it easily attracts and absorbs moisture This moisture can cause rust and corrosion on the steel engine parts crankshaft bearings wrist pin and starter shaft if the fuel is not removed from the engine There are after run oil products available from your hobby dealer or you can use WD 40 a common household lubricant To ensure your TRX 3 3 Racing Engine is protected from internal corrosion use the following procedure 1 Shut off the engine by pinching the fuel line closed This allows most of the excess fuel to be consumed by the engine Be sure the throttle is
60. le looking through the opening rotate the spur gear to align the cutout notch on the internal 2 speed clutch drum with the opening 4 Hold the spur gear and slowly roll the truck forward until the hex on the black adjustment set screw becomes visible in the opening Note the truck will only roll forward not backwards when the spur gear is held stationary 5 Insert the 2 0mm hex wrench through the clutch drum and into the adjustment screw 6 Turn the adjustment screw 1 8 turn counter clockwise to lower the shift point shifts sooner Be careful not to loosen the adjustment screw too much or you may cause the screw and spring to fall out requiring major disassembly and repair Turn the adjustment screw clockwise for later shifts Counter Clockwise 7 Reinstall the rubber access plug to prevent dirt from entering the transmission Do not put oil or other lubricants into the transmission through the two speed adjustment access 8 Check performance by running a test lap after each adjustment On a small race track with many tight turns try setting the shift point later so that the truck only shifts into second gear on the main straightaway This will prevent an unexpected shift in the middle of a turn On larger tracks it may be necessary to allow earlier shifts for increased speed Adjusting the Spur Gear Clutch Bell Gear Mesh The ideal spur gear clutch bell gear mesh for T Maxx 3 3 is 0 1mm To set the gear
61. le s clockwise to decrease the amount of fuel the engine receives Low speed needle LSN Needle valve that controls the fuel mixture at low throttle openings Needle valve Valve consisting of a tapered needle that closes against a corresponding seat to regulate fuel flow Nitro Abbreviation for nitromethane a component of model engine fuel that improves fuel combustion and power output Nitro also refers to a class of R C powered by model engines instead of electric Nitro content The amount of nitromethane used in the fuel Usually measured as a percentage of the total fuel volume Traxxas engines are optimized to use 10 20 nitro 33 nitro may be used for racing Nitromethane Nitromethane is a component in the fuel that increases power from the combustion process up to a point Engines are generally optimized to use a range of nitro content for the best power O ring Rubber O shaped ring used as a sealing gasket Pipe Abbreviation for the tuned exhaust pipe on a nitro engine See Tuned Pipe Piston The piston is the internal engine part that is attached to the upper end of the connecting rod and moves up and down in the cylinder sleeve The precise fit between the piston and the sleeve creates a seal that allows the engine to have the required compression for combustion THE TRX 3 3 RACING ENGINE Port Ports are openings in the sleeve that allow atomized fuel to enter the combustion chamber and burned exh
62. lean and re oil the air filter The instructions for this procedure are on page 23 We cannot stress enough the value of cleaning your air filter at the scheduled intervals The cleanliness and condition of your Slipper clutch pads friction air filter directly influences the running life span of your engine material Under normal use the Inspect the connecting rod after 3 gallons of fuel have been used for a brand new engine under the terms of the Traxxas Lifetime Engine Replacement Plan ERP It could save you time and effort Details are in your model s documentation ei friction material in the slipper clutch should wear very slowly If the thickness of any one of the ei Clean the outside of the engine of accumulated dirt oil and grime Accumulated grime will decrease the engine s ability to cool itself slipper clutch pads is 1 8mm or less package Tighten the wheel nuts especially on the left side Use the 8mm end the friction disc should be replaced of the included glow plug wrench Measure the pad thickness using calipers or The TRX 3 3 Racing Engine is measuring against the diameter of the 1 5 and designed to be easy to After each running session 2 0mm hex wrenches provided with the model rebuild Critical engine components such as the crankcase crankshaft and engine bearings are made to extremely high quality standards and should under normal circumstances outlast multiple sets of pistons sle
63. line The thick silicone tubing that carries fuel from the fuel tank to the carburetor Glow plug The glow plug is located in the cylinder head at the top of the combustion chamber It contains an element that glows red hot when voltage is applied When the engine is being started the heat from the glow plug ignites the fuel mixture and starts the combustion process Glow plug driver This tool clips onto the glow plug and supplies the required voltage to light the glow plug element It is also called an igniter EZ Start equipped engines do not require this separate tool Header The aluminum tube that connects the exhaust system to the engine exhaust port The length and diameter of the header must be carefully selected to extract the most power from the engine High speed needle HSN Adjusts the carburetors fuel air mixture at high throttle openings Idle speed The speed rpm the engine runs at when the transmitter s throttle trigger is at neutral Idle speed screw ISS Located on the carburetor body This screw adjusts the idle rpm of the engine Lean A running condition where the engine is not getting enough fuel for the available air Symptoms include engine overheating or the engine runs for a short time and then stalls particularly at high speed This is a dangerous condition that should be corrected immediately or it can ruin your engine Leaning the mixture Turning either the high speed and or low speed need
64. lity to handle any of your Traxxas service needs Maintenance replacement parts and accessories may be purchased directly from Traxxas by phone or online at www BuyTraxxas com You can save time along with shipping and handling costs by purchasing replacement parts from your local dealer Do not hesitate to contact us with any of your product support needs We want you to be thoroughly satisfied with your new T Maxx 3 3 Toll free support is available to U S residents only Outside the U S call 972 265 8000 Traxxas 1100 Klein Road Plano Texas 75074 Phone 972 265 8000 Toll free 1 888 TRAXXAS Traxxas U K P O Box 1128 Winterbourne Bristol BS36 2SH England Phone 44 117 956 1002 Internet www Traxxas com E mail support Traxxas com Entire contents 02005 Traxxas Traxxas Maxx T Maxx 3 3 TRX 3 3 Racing Engine TQ 3 Top Fuel EZ Start Ready To Race Ready To Win and ProGraphix are trademarks or registered trademarks of Traxxas Other brand names and marks are the property of their respective holders and are used only for purposes of identification No part of this manual may be reproduced or distributed in print or electronic media without the express written permission of Traxxas T MAXX 3 3 3 SAFETY PRECAUTIONS All of us at Traxxas want you to safely enjoy your new T Maxx 3 3 All instructions and Operate your T Maxx 3 3 sensibly and with care and it will be exciting precautions outlin
65. m batteries see Use the Right Batteries on A peak detecting charger is Glow plug and recommended for best wheel nut wrench performance and longest battery life For more information see Use the Right Charger on page 26 U joint wrench 8mm 5mm wrench 4 way wrench Antenna nut wrench Recommended Equipment These items are not required for the operation see page 23 of your model but are a good idea to include in any 10 quart 5010 am R C toolbox 20 quart 5020 er 33 quart 5030 Safety glasses 10 gallon 5060 we Thin hobby quality 20 gallon 5070 Gg VK gt cyanoacrylate instant tire 33 gallon 5080 glue CA glue NiCad or NiMH battery charger Side cutters or needle Traxxas part 3030X shown nose pliers Foam air filter oil and Suspension multi tool 1 5mm L wrench 2 0mm T wrench 2 5mm L wrench a GO extra oiled air filter element Traxxas Top Fuel NiCad or NiMH see page 22 7 2V battery pack Fuel dispensing bottle After run oil to protect Ji A Small flat blade screwdriver Traxxas part 5001 shown the engine from corrosion nooy liie lla rio for tuning 1 8 inch blade TRX Power Charger RX battery power pack RX Wiring Harness DC car adapter for TRX Power Charger Traxxas part 3030X Traxxas part 3037 Traxxas part 3034 Traxxas part 3032 sold separately T MAXX 3 3 5 ANATOMY OF YOUR T MAXX 3 3 pa Fuel C EE Slipper Cl
66. mesh place a strip of standard letter A4 size copy or printer paper about 0 1mm thick between the mating teeth Loosen the four engine mount screws from the bottom side of the chassis see image and slide the engine mount up to push the clutch bell gear against the spur gear so the paper is not too tight to pull out or too loose that it will fall out Tighten the engine mount screws securely When the paper is removed you should feel only the slightest amount of play between the gears almost none and there should be no binding or friction O the Spur Gear Remove the four cap head screws that secure the engine to the engine mount 2 Remove the button head screw that secures the pipe hanger to the rear body mount see inset 3 Carefully remove the engine and exhaust system from the spur gear area to allow enough room to remove the spur gear 4 Remove the three screws on the slipper clutch assembly using a 2 5mm hex wrench Slide the spur gear off of the slipper shaft If the spur gear is too tight on the shaft gently pry on the back of the gear with a flat screw driver to loosen it Repeat the above steps in reverse order to install the new spur gear Adjusting the Gear Ratio The gear ratio on T Maxx 3 3 can be adjusted for different conditions that may require either increased acceleration or increased top speed Adjusting the gear ratio is accomplished by changing the clutch bell on the engine and or the spur gear
67. nd inexperienced drivers should not operate the T Maxx 3 3 without the supervision of a responsible and knowledgeable experienced adult The engine can be loud If the noise makes you uncomfortable wear ear protection Be considerate of your neighbors by not running your model early in the morning or late in the evening Model engin langer ind highl Always follow all directions and precautions printed on the fuel container Model engine fuel is poisonous to humans and animals Drinking the fuel can cause blindness and death Handle with care and respect Most importantly use good common sense at all times Model engine fuel especially when in a fuel dispensing bottle may look like a cool drink to a child Model engine fuel is flammable Never allow smoking sparks heat or flame in the presence of fuel or fuel vapors Ki The engine brakes and exhaust system may become extremely hot during use Be careful not to touch the parts especially when refueling or stopping the engine Prolonged exposure to the engine exhaust can be harmful Avoid breathing the engine exhaust Always run your T Maxx 3 3 outdoors in a well ventilated area Never run the engine indoors 4 e T MAXX 3 3 QUIPMENT T Maxx 3 3 comes with a set of specialty metric tools You ll need to purchase other items available from your hobby dealer to operate and maintain your model H For more information on radio syste
68. ng or removing the clip on spring pre load spacers Note that changes in ride height will occur when changes in shock angle or spring rates are made You can compensate for ride height changes by changing the pre load spacers on the shocks For easier access to the rear most shock mounting screw remove the one end of the rear turnbuckle In the front remove the suspension pin from the lower front suspension arm to gain easier access to the lower shock mounting screws Shock Mounting Positions Big bumps and rough terrain require a softer suspension with the maximum possible suspension travel and ride height Racing on a prepared track or on road use requires a lower ride height and firmer more progressive suspension settings The more progressive suspension settings help reduce body roll increased roll stiffness dive during braking and squat during acceleration Upper shock mounting position A should generally be used with lower shock mounting positions 1 and 2 Upper shock mounting position B should be generally be used with lower shock mounting positions 3 and 4 The innermost upper shock mounting position 0 can be used for tuning with the inner pair of lower shock mounting positions on the arm 1 2 It is not compatible with lower shock mounting positions 3 and 4 Other combinations may be used to achieve individualized suspension settings T MAXX 3 3 35 36 T MAXX 3 3 TUNING ADJUSTMENTS Lowe
69. ng trim knobs on the face of the transmitter THE TRAXXAS TQ 3 RADIO SYSTEM Your TQ 3 transmitter uses 8 AA batteries The battery compartment is g Use the Right Batteries located in the base of the transmitter Your transmitter uses AA batteries Use new alkaline batteries or rechargeable batteries such as NiCad or NiMH Nickel Metal Hydride batteries in your transmitter Make sure 4 Turn on the transmitter and check the power indicator for a rechargeable batteries are solid red light fully charged according to the manufacturer s instructions Press in tab If the power indicator light flashes then the transmitter batteries are weak discharged or possibly installed incorrectly Replace with new or If you use rechargeable freshly charged batteries The power indicator light does not indicate batteries in your the charge level of the batteries installed in the model transmitter be aware that when they begin to lose their charge they lose power much more quickly than regular alkaline batteries Caution Discontinue 1 Remove the battery compartment door by pressing the tab and d your O lifting the door up at the first sign of wea 9 H batteries flashing red e P BE g light to avoid losin 2 Install the batteries in the correct orientation as indicated in the See 9 battery compartment 3 Reinstall the battery door and snap it closed If the power indicator doesn t light red check the polarity
70. no tire slippage on a high traction surface such as concrete or a prepared racetrack The slipper should not be tightened to the point that clutch slippage is completely eliminated Do not overtighten the slipper nut or you could damage the slipper bearings pressure plates or other components All of the toe links are installed on the truck so that the left hand thread indicators point to the same direction This makes it easier to remember which way to turn the wrench to increase or decrease toe link length the direction is same at all four corners Note that the groove in the hex indicates the side of the toe link with the left hand threads Right Side Right Hand Normal Threads Increase Left Hand eae Threads La Decrease Length T MAXX 3 3 37 Two Speed Adjustment note If the truck will not roll forward while the spur gear is held the transmission may still be in reverse gear 38 T MAXX 3 3 TUNING ADJUSTMENTS Adjusting the Two Speed Transmission T Maxx 3 3 comes equipped with an adjustable two speed transmission When the shift point on the transmission is adjusted correctly it will maximize acceleration and improve drivability Use a 2mm hex wrench to adjust the shift point To make the adjustment the engine must be off not running 1 Shift the transmission into forward gear shift button down 2 Remove the rubber access plug from the top of the transmission housing 3 Whi
71. o 20 This allows greater fuel flow through the engine and promotes cooler running even at the maximum lean settings If 33 improves power then it seems that the highest nitro content available beyond 33 should always be used in the engine In reality there are practical limitations Engines are designed to run best within a range of nitro percentages How the engine is ported the size of the combustion chamber and other factors determine how much nitro can be efficiently used in the engine The TRX 3 3 Racing Engine responds exceptionally well to a maximum of 33 nitro returning cooler temps more power and a smoother throttle response For those who want to run higher nitro 33 Top Fuel is the optimum nitro percentage for the TRX 3 3 Racing Engine Increasing the nitro beyond 33 can introduce the need for engine modifications ports head shimming etc to avoid starting and tuning difficulties There are limits to how much nitro an engine can effectively use to make more power Lower nitro percentages have their own advantages Nitro is an expensive component in the fuel so 10 nitro blend is more economical for the sport user 10 also provides greater latitude with the needle settings for easier tuning When using Traxxas Top Fuel using higher nitro percentages does not cause the engine to wear out faster 33 Top Fuel contains the same quality lubrication package as 10 and 20 Top Fuel Some non Traxxas high percentage nitr
72. o help provide a better understanding of engine tuning and why it s necessary the following is a brief explanation of the air fuel combustion process that takes place inside the engine In order to create the cylinder pressure that results in power the engine burns the air fuel mixture Both air and fuel in correct amounts are needed for proper combustion It is the carburetor s job to mix the air and fuel together atomize the fuel in the correct proportion for the best possible combustion This is the ideal air fuel ratio The ideal air fuel ratio required for the engine remains roughly constant Due to variations in atmospheric conditions temperature humidity altitude etc fuel flow adjustment valves called fuel mixture needles are required to meter the fuel and maintain the ideal air fuel ratio in these ever changing conditions For example colder air is more dense more air molecules for a given volume of air and therefore requires more fuel more fuel molecules to maintain the correct air fuel ratio Warmer air is less dense fewer air molecules and therefore needs less fuel to maintain the correct air fuel ratio The tuning needles are there to adjust how much fuel is made available for the carburetor to mix with the available air atomization Cold Air More Dense Femme eich za Warm Air Less Dense The amount of fuel metered and atomized by the carburetor is controlled by the two mixture needles the high
73. o racing fuels do sacrifice some lubrication in attempts to increase performance We urge you to not take chances with your engine investment and use Top Fuel for consistent performance and long engine life What about Other Fuels Can other brands of fuel be used besides Top Fuel There are other fuels that can provide satisfactory performance however there could be long term costs in the form of decreased engine performance loss of tuning ease and shorter engine life Only use fuels that contain both castor and synthetic oil Everyone has an opinion or a claim to make about fuel The engineering team at Traxxas has spent years developing TRX Racing Engines No one knows more about the specific fuel requirements of Traxxas engines than Traxxas engineers We strongly urge you not to take chances with your engine investment and use the Traxxas fuel made for the TRX 3 3 Racing Engine Handling the Fuel Follow all directions and warnings on the fuel can Keep the fuel tightly capped at all times Some components in the fuel can evaporate very quickly and upset the balance of the fuel Do not store unused fuel in the fuel dispenser Immediately return fresh unused fuel back into the fuel can Do not mix old and new fuel Never mix different fuel brands together Store the fuel in a cool dry location away from any source of heat ignition or combustion Read and follow the safety precautions on page 4 in this manual ve E ve
74. oop settings for a particular truck Try to avoid riding on the wheelie bar wheels during normal driving this can happen in the lowest setting with lower than stock ride heights Position 4 no wheelies The top position on cross bars Offers the flattest launches with little or no wheelie This is the factory installed position to reduce wheelies during break in Remove the wheelie bar when the T Maxx will be jumped or driven in harsh off road conditions Position 1 big wheelies Bottom position on cross bars Allows the truck to tip back the furthest during a wheelie for longer high speed wheelies STORING YOUR T MAxx 3 3 Your T Maxx 3 3 requires timely maintenance in order to stay in top Other periodic maintenance running condition Neglecting the maintenance could allow dirt Connecting rod The connecting rod should be replaced when the If the engine is worn or deposits and moisture to build up inside the engine leading to internal piston and sleeve are replaced Also replace the piston wrist pin and damaged enough to require engine failure The following procedures should be taken very seriously G clip whenever the connecting rod is replaced As with other replacing the piston cleave After each hour of running internal engine components connecting rod life depends engine s or connecting rod consider usage and the quality and frequency of the engine maintenance exchanging your old engine Q C
75. ou go on here are some important precautions to keep in mind Don t run your T Maxx 3 3 in water mud snow or wet grass It s tempting but water and mud are easily drawn through the air filter and will severely damage the engine Small amounts of moisture can cause electronics to fail and loss of control over your T Maxx 3 3 Snow is frozen water Do not drive the T Maxx 3 3 in snow or the electronics could be damaged by water To shift into reverse bring your T Maxx 3 3 to a complete stop and push the shift button up Accelerate to engage the gear To return to forward gear repeat the same procedure but move the shift button down T Maxx 3 3 will not shift between forward and reverse unless the truck is stopped If it will not shift then refer to the troubleshooting section on www Traxxas com or call Traxxas support The TRX 3 3 Racing Engine is extremely powerful Remember to apply the throttle gradually to prevent loss of control T Maxx 3 3 is very fast and responsive and is intended for experienced drivers Do not drive over the limits of your reflexes and ability Drive with caution at all times and gradually build up your ability to maintain control at T Maxx 3 3 s upper performance limits Driving Tips Monster trucks by design have a high center of gravity that requires a different driving technique To prevent rollovers slow down as you Don t hold T Maxx 3 3 off the ground and rev the en
76. ovement of the piston Use the following procedure to clear a flooded engine 1 Remove the blue glow plug wire 2 Remove the glow plug and gasket with the glow plug wrench supplied with your model A 5 16 or 8mm nut driver will also work 3 Turn the model upside down and plug in the EZ Start controller 4 Push the EZ Start button for several seconds to clear the engine of excess fuel Do not look into the glow plug hole while the engine is spinning or you could spray fuel into your face 5 Turn the model over and reinstall the glow plug and gasket 6 Reconnect the blue glow plug wire to the glow plug 7 Reconnect the EZ Start controller 8 Do not prime the engine Pull the throttle to 1 2 throttle and push the EZ Start button The engine should start immediately Piston stuck at top dead center TDC Top dead center is the position where the piston is at the very top of the tapered sleeve Occasionally an engine can get stuck at this position This is most likely to happen on new engines during break in but can also happen at other times If the engine is stuck at TDC use the following procedure to release the piston from the sleeve 1 Remove the glow plug using the included tool or 8mm 5 16 nut driver and verify that the piston is at the top of its stroke 2 Use a flat blade screwdriver to rotate the flywheel Place the blade of the driver into one of the grooves of the flywheel and push down turning
77. pen then the main water valve can be used to adjust how fast the water flows The engine s performance is directly linked to the fuel mixture Richening the fuel mixture increases the amount of fuel in the air fuel mixture ratio and leaning the fuel mixture decreases the amount of fuel in the air fuel mixture ratio THE TRX 3 3 RACING ENGINE Slightly lean fuel mixtures deliver stronger more efficient combustion and more power but with less lubrication 8 Slightly rich fuel mixtures deliver cooler running and more lubrication but with slightly less power Tuning the engine means finding the perfect balance between the two excellent power to meet your needs while maintaining good lubrication for long engine life The optimal fuel mixture setting is rich to provide a safety margin against having a lean condition if some variable changes such as the temperature from one day to the next General fuel mixture settings are measured by the number of turns the needles are turned out from fully closed The fuel mixture settings have been pre set from the factory to typical break in settings Do not readjust your carburetor from the factory settings until after the engine is started and running and you have been able to observe the engine running to assess what minor adjustments may be required to compensate for fuel temperature and altitude Adjustments are usually made in 1 8 or 1 16 turn increments If the engine sticks at TDC
78. r Shock Mounting Positions In the out of the box configuration the shocks are installed in position A on the shock tower and position 2 on the lower suspension arm This setting allows for firm suspension and low ride height increasing the spring force at the wheel This setting improves high speed cornering on smoother terrain by lowering the center of gravity Body roll brake dive and squat are also reduced The inner pair of holes on the lower suspension arm should be used to increase the ride height of the T Maxx 3 3 The more vertical position of the shocks will allow for lower shock progression and the soft plush feel that s characteristic of a Traxxas Maxx Truck Spring rate at the wheel increases as the lower shock mounting position is moved from position 1 to position 4 This is equivalent to using stiffer springs Use higher spring rate settings for flatter terrain with smaller and fewer bumps and lower spring rate settings for bigger bumps Ride height decreases as the lower shock mounting position is moved from position 1 to position 4 Each pair of lower shock mounting holes 1 2 and 3 4 has equal ride height Use lower ride height for high speed cornering and flat terrain and when racing on relatively smooth tracks Increase the ride height for rougher terrain and tracks Upper Shock Mounting Positions The upper shock mounting positions will have suspension effects opposite from the lower shock mounting
79. re to vary almost in direct proportion to air temperature Assuming you tuned the engine for the same maximum performance each day the engine will run about twenty degrees hotter when it s ninety degrees outside than it would in seventy degree weather For this reason we cannot give you a definitive temperature range that indicates the best possible engine tuning THE TRX 3 3 RACING ENGINE There is NO optimal temperature that can be used as a target to deliver the best engine tuning Do not rely on a temp gauge alone to tune your engine Tune the engine by paying very close attention to how it responds to changes in fuel mixture more smoke less smoke fast sluggish reliable stalling smooth sound muffled sound etc Once the engine is tuned then observe the temperature The temperature gauge can aid you in tuning by giving you a relative indication of how your adjustments are affecting the engine and to help prevent you from reaching excessive engine temperatures For example as you lean the fuel mixture the engine performance will increase along with the temperature If you continue to lean the fuel mixture and the temperature increases but the engine performance does not change then you have exceeded the maximum safe lean setting Make note of the engine temperature Generally try to keep your engine from exceeding 270 F when measured at the glow plug If necessary increase airflow to the engine by cutting out the rear of the bo
80. rly empty 2 Apply the throttle gradually Your finger should not reach full throttle until the end of the three second count T Maxx 3 3 may try to shift into second gear If it does reduce the throttle input Do not let T Maxx 3 3 shift out of first gear 3 Keep your driving smooth and consistent 4 When the fuel tank is nearly empty shut off the engine and refuel ch Driving procedure Gently pull the throttle trigger to full throttle over a 3 second count hold for 2 more seconds and then gently apply the brake to stop Count the five seconds out while accelerating Repeat this starting and stopping procedure until the fifth tank of fuel is nearly empty 2 The model should now be shifting into second gear If it is not try turning the high speed needle clockwise 1 8 turn to lean the fuel mixture slightly and test for shifting 3 When the fuel tank is nearly empty shut off the engine and refuel STOP Clean your air filter before you proceed Refer to the instructions on page 23 During the sixth tank of fuel the engine can be tuned for general performance use Proceed to the next section in this manual page 31 Off Apply throttle gradually On Apply throttle gradually On Reduce idle speed if necessary On Do not allow shifting to high gear On Accelerate over 3 second count hold for 2 seconds High Altitude Operation If you live in a high altitude region 5000 or more feet
81. see page 6 The slipper clutch is adjusted using the spring loaded locknut on the slipper shaft Use the supplied 8mm open end metric wrench To tighten or loosen the slipper nut insert the 2 0mm hex wrench into the hole in the end of the slipper shaft This locks the shaft for adjustments Turn the adjustment nut clockwise to tighten less slippage and counter clockwise to loosen more slippage The slipper clutch has two functions 1 Limiting the engine s torque output to the wheels to prevent wheelspin on low traction surfaces and help to prevent damage to the gears in the transmission during on throttle landings 2 Protecting the drivetrain from sudden impact or shock loads such as landing from a jump with the engine at full throttle From the factory the slipper clutch is set for minimal slippage just enough to protect the drivetrain from shock loads On slippery low traction surfaces such as a hard packed dry racetrack you may benefit from loosening the slipper adjustment nut to allow for more clutch slippage This will make the truck easier and more forgiving to drive by helping to reduce the amount of wheel spin Loosening the slipper adjustment can also improve performance on extreme high traction surfaces by preventing the front end from lifting off of the ground when accelerating Make slipper adjustments in small 1 8 turn increments The maximum tight setting for the slipper is just at the point where there is little or
82. servo reversing switches Throttle Neutral Adjustment The throttle neutral adjustment is located on the transmitter face and controls the forward reverse travel of the throttle trigger Change the adjustment by pressing the button and sliding it to the desired position There are two settings available e 50 50 Allows equal travel for both acceleration and braking e 70 30 Allows more throttle travel 70 and less brake travel 30 50 50 is the required setting for T Maxx 3 3 with the TRX 3 3 Racing Engine STEERING TRIM Electronic Throttle Trim The electronic throttle trim located on the face of the transmitter adjusts the neutral center point of the throttle servo when the servo is at rest This control has been preset for you at the factory If necessary adjust the control so that the carburetor is at idle and the brakes are not applied the model will roll freely Do not use the throttle trim to raise or lower the engine idle speed Make the idle speed adjustment on the carburetor Electronic Steering Trim The electronic steering trim located on the face of the transmitter adjusts the neutral center point of the steering servos when the servos are at rest Adjust this control to make the model drive straight with no steering input at the wheel THE TRAXXAS TQ 3 RADIO SYSTEM Servo Reversing Switches 2 Set the TQ 3 Transmitter to its factory default shift settings The servo reversing switches are located on the
83. sitioning the shims on the pivot point of the upper suspension arms Caster adjustment shims 2 Front Caster adjustment shims 1 Front 1 Rear Caster adjustment shims 2 Rear Mental Vertical Dis Ground plane ES 10 Ground plane 7 Ground plane The stock caster setting is 7 degrees with one shim at each end of the arm Reduce the caster angle to 4 degrees by removing the rear shim and inserting it next to the front shim The caster angle can be increased to 10 degrees by removing the front shim and inserting it next to the rear shim Fine Tuning the Shocks The eight shocks oil dampers on your T Maxx 3 3 have tremendous influence on its handling Whenever you rebuild your shocks or make any changes to the pistons springs or oil always do it carefully and in sets front or rear Piston head selection depends on the range of oil viscosities that you have available For example using a two hole piston with lightweight oil will give you the same damping as a three hole piston with heavier oil We recommend using two hole pistons with a range of oil viscosities from 10W to 40W available from your hobby shop The thinner viscosity oils 30W or less flow with less resistance and provide less damping while thicker oils provide more dampening Use only 100 pure silicone shock oil to prolong seal life From the factory the T Maxx 3 3 uses 30W oil The ride height for the T Maxx 3 3 can be adjusted by addi
84. t 20 Clutch bell 19 38 Crystal X tal 10 Customer support 3 Cylinder sealing 28 Decals 8 Differential 6 Driveshaft 6 Driving 34 tips 34 Dyno 20 e mail 3 Engine TRX 3 3 6 18 break in 20 28 tank 129 tank 2 29 tank 3 29 tank 4 29 tank 5 29 tank 6 29 winter break in 30 clearing a flood 45 combustion chamber 20 connecting rod 20 42 crankcase 19 20 crankshaft 19 20 cylinder head 19 20 cooling fins 20 fit 20 INDEX head protector 19 header 21 mount 19 piston 21 42 port 21 shut off clamp 6 19 27 shutting off 27 sleeve 21 42 starting 28 terms 20 tuning 31 by temperature 33 EZ Start 20 26 battery 27 controller 19 drive unit 19 motor 6 19 plug 6 19 glow plug wire 19 ground wire 19 negative wire 19 positive wire 19 protection mode 27 using 27 Factory needle settings 25 28 Flag color 10 Flame out 20 Flywheel 19 Forward and reverse operation shifting 9 34 Frequency 10 clearing 10 Fuel see also nitromethane 5 20 22 dispensing bottle 5 fuel line 6 19 20 handling 22 mixture 20 other fuels 22 pressure line 6 19 tank 6 19 filling with fuel 23 fuel cap 6 tank seal adjustment 23 T MAXX 3 3 45 46 e T MAXX 3 3 INDEX Gear Ratio 38 Glow plug 19 20 driver 20 fouled 28 igniter 26 Hex Hub 6 High speed needle 19 21 adjustment 31 Humidity 32 Idle speed screw 19 21 adjustment 25 32 Jumping 34 Lean 21 25 Low speed needle 19 21 adjustment 32 mAh 10 Maintenance 42
85. t achieve the best results Follow the easy steps in this manual A clean air filter is critical for long engine life Due to the high performance nature of the TRX 3 3 Racing Engine a tremendous amount of vacuum is created to move a large volume of high velocity air through the carburetor Dirt is the worst enemy to your engine Clean the air filter after each hour of running to prevent sucking dirt into the engine An extra pre lubed air filter element has been provided to encourage you to maintain your air filter D D D Perform after run maintenance on the engine to prevent corrosion from building up on the internal engine components The fuel naturally attracts moisture and corrosion can build up very quickly inside the engine if it is not prevented A few minutes spent before and after each time you run your model will allow you to enjoy it for a long time to come Read on for more exciting details about your new engine THE TRX 3 3 RACING ENGINE Glow Plug Air Filter Housing Head Protector PowerTune Head Cylinder Head EZ Start Drive Unit EZ Start Motor Fuel Intake Air Intake Engine Mount Carburetor Crankcase Flywheel Crankshaft Clutch Bell Throttle Arm EZ Start Plug Glow Plug Wire Positive Wire Engine i i Shut off Negative Wire EZ Start Clamp Controller Pressure Line Tuned Pipe Exhaust Tip Fuel Line Fuel Tank
86. the flywheel counter clockwise when viewed from the front The flywheel should turn unsticking the piston from the sleeve 3 Put two or three drops of light machine oil into the glow plug hole to lubricate the piston and sleeve Do not use too much oil It will hydro lock the engine Verify the starter will spin the engine with the glow plug out 4 Rotate the flywheel so the piston is at bottom dead center and replace the glow plug with gasket Reconnect the blue glow plug wire 5 You should now be able to start the engine with the EZ Start Top Dead Center Bottom Dead Center 20 20 ABC 20 Address 3 After run procedure 43 Air density 33 Air filter 5 6 20 23 cleaning 23 foam 20 housing 19 oil 5 Air fuel mixture 24 Air fuel ratio 24 Alignment settings 37 Altitude 29 32 Antenna 13 crimp nut 13 mount 6 post 13 sleeve 13 tip 13 transmitter 9 13 tube 13 wrench 13 Atmospheric conditions 24 Axle Carrier 6 Barometric pressure 33 Baseline setting 33 Batteries 5 7 2V battery pack 5 alkaline 5 battery box 6 charger 5 12 26 NiCad 10 NiMH 10 receiver 12 RX power pack 5 BDC 20 Body Mount Post 6 Brake 6 brake pad 39 setup amp adjustment 39 shoulder screw adjustment 39 Bulkhead 6 Bumper 6 40 Bumper Mount 6 40 Camber 37 Carburetor 19 20 24 air intake 19 fine tuning 33 fuel intake 19 fuel mixture needles 24 31 32 slide 21 throttle arm 19 Channel 10 Chassis 6 Clean ou
87. the transmission side Adjust in one of the following ways The following gear ratio chart shows the available combinations with optional spur gears clutch bells and two speed gear sets 1 Use a 50mm feeler gauge di cd i between the brake pad insert 2nd gear sets Gear 54 56 58 171 3971 Ist 25 42 26 36 27 30 and brake disc BESSE 2nd 17 63 18 28 18 94 2 Push the outer brake pad firmly 16T 40T ist 25 42 26 36 27 30 against the inner pad with your Close 2nd 19 21 19 92 20 63 7 ees ET Ast 2542 2636 2730 finger sandwiching the brake Wide 2nd 16 22 16 82 17 42 disc between the brake calipers Tighten the brake shoulder bolts until they just barely touch the brake pads Do not over tighten these E of Spur Gear Teeth fasteners or you could damage the brake calipers Loosen each of the 2nd gear sets Gear 54 56 58 shoulder bolts by 1 turn 17T 39T 1st 23 11 23 96 24 82 Standard 2nd 16 03 16 62 17 21 Brake Pad Wear and Replacement 161 40T Ist 23 11 23 96 24 82 During normal use the brake pads should wear at a relatively slow rate clase 2nd 17 47 18 11 18 76 However if the brake pads wear down close to the metal pad holders 18T 38T 1st 23 96 24 82 th hould b d A h hi ld d Wide 2nd 1529 15 84 ey should be replaced Any more wear than this could cause damage to the brake parts and improper operation of the brake system With of Spur Gear Teeth 2nd gear sets Gear 54 56 58 17T 39T 1st 21 18 21 97 22 75
88. ther 0 degrees toe in This will ensure the same amount of steering in both directions Adjust the rear toe control links so that the rear wheels have 1 of toe in Static Camber Adjustment The wheels can be set to have either positive or negative camber see illustration below The camber angle changes as the wheel moves up and down through its range of travel Static camber is the camber angle at the wheel when the vehicle is set at its normal stationary ride height The suspension pivot balls located in the axle carriers adjust the static camber The pivot balls are protected by blue dust plugs To adjust your static camber insert the supplied 2 5mm hex wrench through the slit in the dust plug and engage the end of the pivot ball compressing the suspension until the arms are parallel to the ground will allow for easier hex wrench engagement The upper pivot ball is normally screwed all the way in Negative camber is achieved by screwing the pivot ball of the lower control arm out Note When camber is changed the toe angle of the wheel has to be reset Static Camber Base Factory Settings Front 1 degree negative camber each side Rear 1 degree negative camber each side Positive Camber Negative Camber TUNING ADJUSTMENTS Adjusting the Slipper Clutch Your T Maxx 3 3 is equipped with an adjustable Torque Control slipper clutch The slipper clutch is integrated into the main spur gear on the transmission
89. three servo outputs The TQ 3 works in conjunction with the OptiDrive Electronic Shift Module to monitor and control the input and output signals for the throttle and shifting servos channels The OptiDrive monitors the voltage of the on board batteries The Function LED will flash red if the battery voltage is too low The OptiDrive ESM is designed to adapt and work with aftermarket three channel radio systems see page 15 4 cell Batter Throttle Neutral Adjust 7 Antenna Holder Steering Wheel Throttle Trim On Off Switch Steering Trim Receiver Steering Servo Reverse Shift Battery Channel 1 Channel 2 Channel 3 OptiDrive ESM Electronic Shift Module Forward Shift Throttle Trigger Shifting Servo Throttle Brake Servo Reversing Servo Switch To Transmission Power Indicator OptiDrive sensor Power Switch Battery Compartment T MAXX 3 3 9 1 Learn terms related to the TRX 3 3 Racing Engine beginning on page 20 10 T MAXX 3 3 THE TRAXXAS TQ 3 RADIO SYSTEM Please take a moment to familiarize yourself with these radio system terms They will be used throughout this manual 5 Cell Pack Another term for RX Pack or rechargeable receiver pack The RX pack is made up of five rechargeable NiMH battery cells and is used in place of the 4AA batteries in the model Channel The 27 MHz frequency band is divided into 6 channels so that up
90. tic housing consisting of a permanently assembled mesh cap and body 3 An oiled foam element lean This includes the break in time Clean your air filter after break in Dust which is often too fine to see and dirt constantly move through the filter anytime the engine is running Even if you can t see dirt on the filter it is present inside the foam after any amount of run time If you exceed the recommended cleaning intervals your engine will be damaged Engine damage or wear due to dirt ingestion is easy to detect and one of the top causes of premature engine failure Air Filter Cleaning Instructions 1 THE TRX 3 3 RACING ENGINE Remove the air filter from the carburetor bore by pulling the entire filter assembly firmly to the side to release it Do not pull straight up Disassemble the filter Pull the rubber air filter neck out of the filter body With the base removed the foam element is visible in the bottom of the filter body Pull out the foam element Clean the filter parts by thoroughly washing all three pieces of the filter assembly in hot soapy water dishwashing detergent works well Repeat twice Thoroughly dry the parts with a clean towel or compressed air Remember to wear your safety glasses when working with compressed air Oil the foam element with foam filter oil Use the supplied Traxxas filter oil part 5263 or a high quality special purpose foam filter oil like what is used for off road
91. tional mass for quicker acceleration and constant drive engagement for smooth power delivery damaged sensor b Receiver has lost signal from the Ki If the transmitter throttle settings are changed it will be necessary o o to complete the programming sequence again transmitter the OptiDrive has The OptiDrive module prevents the transmission from changing e If the SET button is released before the Function LED flashes entered fail safe throttle and shift directions while the truck is in motion The truck must be completely green twice in step 3 the OptiDrive will return to the normal servos become unresponsive stopped to change directions regardless of the position of the shift operation mode Blue flashing Sensor selector switch on the transmitter The OptiDrive module is preset at the e If you experience any problems during programming turn the Normalloperationias E S A sensor vehicle moves Indicates factory If the transmitter throttle trim adjustment is changed then the receiver off then on again and repeat the programming steps EE Aeon pening OptiDrive module will need to be re programmed on the rotor position solid blue or off For instructions on how to use the OptiDrive with aftermarket radio when vehicle is at rest 1 The engine must be shut off The radio system must be on receiver systems or to access advanced programming options visit our website and transmitter www Traxxas com T MAXX 3 3 15
92. to 8 seconds around 200 to 210 degrees If the water sizzles for only a few seconds then it is likely that it is over 220 degrees and needs to cool down If the water takes a long time or does not evaporate at all then the engine is too cool We do not recommend that you operate your engine below 35 degrees Fahrenheit If you insist on running your vehicle below 35 degrees be aware that nitro engines may be very difficult to start and tune at extremely cold temperatures Also at temperatures below freezing nitro fuel can actually begin to gel up and this can be harmful to the engine Follow the remaining break in procedures as outlined in this Owners Manual This along with the steps listed above will ensure a good break in for your new nitro engine and provide many hours of enjoyment The engine s performance depends on the fuel mixture Turn the mixture needles clockwise to lean the fuel mixture and counterclockwise to richen it Leaning the fuel mixture will increase engine power up to the engine s mechanical limits Leaning the engine beyond the safe allowable limits will result in poor performance and almost certain engine damage Indications of an overly lean mixture include Overheating temperature beyond 270 F at the glow plug Little or no blue smoke coming from the exhaust If any of these conditions are present stop immediately and richen the high speed mixture 1 4 turn The engine will probably be sli
93. top of the engine that is responsible for dissipating most of the engine s heat The combustion chamber is machined into the bottom of the head Dyno Abbreviation for dynamometer A precise piece of testing equipment that accurately measures engine power and torque output over the engine s entire rpm range EZ Start Traxxas on board electric starting system The system consists of a hand held starter control unit and an on board gearbox with an electric motor to spin the engine Filter foam The oiled foam element inside the air filter housing The filter foam in the TRX 3 3 must be thoroughly cleaned and re oiled after every hour of run time Fit Usually refers to the fit of the piston and sleeve If the fit is tight the piston will feel very tight at top of the sleeve top dead center and the engine will have good sealing and compression If the fit is loose compression will be low and both the piston and sleeve should be replaced Flame out Occurs when the engine stops running at high rpm Usually the fault of an excessively lean fuel mixture or glow plug failure Fuel 10 20 33 The TRX 3 3 must have model engine fuel to run Traxxas Top Fuel is recommended Fuel is sold in quarts and gallons from hobby dealers The 10 20 and 33 labeling refers to the percentage of nitromethane contained in the fuel Fuel mixture The ratio of fuel to air as determined by the needle settings of the carburetor Fuel tubing fuel
94. trictive straight through air path than the barrel carburetor design Stall When the engine stops running usually due to an incorrect fuel mixture setting or running out of fuel TDC Top dead center The top most position of the engine piston stroke Tuned pipe The tuned exhaust pipe usually consists of a specially shaped metal or composite chamber with baffles that is designed to enhance the power output of the engine Wear in Fitment process that occurs during engine break in where internal engine parts develop an even more precise matched fit through actual use under controlled circumstances WOT Abbreviation for wide open throttle T MAXX 3 3 21 DANGER Model engine fuel is poisonous to humans and animals Drinking the fuel can cause blindness and death Handle with care and respect Keep it out of reach of small children at all times While driving do not leave your fuel dispensing bottle on the ground where a child could have access to it Follow fuel label warnings 22 e T MAXX 3 3 THE TRX 3 3 RACING ENGINE Use the Right Fuel It s imperative that you use the correct fuel in your TRX 3 3 Racing Engine for maximum performance and engine life Traxxas Top Fuel should be used to ensure correct engine lubrication performance and ease of tuning Traxxas Top Fuel has been proven in thousands of engines so you can count on it every day for great performance Top Fuel is the only fuel w
95. u the highest level of customer satisfaction possible We truly want you to enjoy your new T Maxx 3 3 Carefully read and follow all instructions in this and any accompanying materials to prevent serious damage to your T Maxx 3 3 Failure to follow these instructions will be considered abuse and or neglect Before running your T Maxx 3 3 look over this entire manual and examine the truck carefully If for some reason you decide the T Maxx 3 3 is not what you wanted then do not continue any further Your hobby dealer absolutely cannot accept a T Maxx 3 3 for return or exchange after it has been run Throughout this manual you ll notice warnings and helpful hints identified by the icons below Be sure to read them An important warning about personal safety or avoiding damage to your T Maxx 3 3 and related components Special advice from Traxxas to make things easier and more fun g Refers you to a page with a related topic If you have any questions about your T Maxx 3 3 or its operation call the Traxxas Technical Support line toll free at 1 888 TRAXXAS 1 888 872 9927 Technical support is available Monday through Friday from 8 30 am to 9 00 pm central time Technical assistance is also available at www Traxxas com You may also e mail customer support with your question at support Traxxas com Join hundreds of Traxxas R C enthusiasts in our online community at www Traxxas com Traxxas offers a full service on site repair faci
96. urn it There are two types of carburetors slide carbs and barrel carbs The TRX 3 3 uses the superior slide carburetor design Clean out Cleaning out is a condition that occurs when the engine is accelerating and the fuel mixture becomes sufficiently lean to allow the engine to continue into its upper rpm power band It is usually characterized by a noticeable decrease in blue exhaust smoke and a dramatic increase in engine speed Combustion chamber The combustion chamber is machined into the bottom of the cylinder head This is where the glow plug ignites the fuel The shape of the combustion chamber is designed to promote more efficient burning of the fuel Connecting rod The connecting rod transfers the piston motion to the crankshaft The TRX 3 3 Racing Engine uses a knife edged connecting rod The aerodynamic sharpened edges allow it to slice through the pressurized air fuel mixture inside the crankcase Crankcase The engine s body that contains all of the running mechanical components Crankshaft The main shaft of the engine that holds the reciprocating assembly Cooling fins The cooling fins are milled into the cylinder head and crankcase and cause heat to be drawn away from the engine Heat is removed when it dissipates into the air passing across the cooling fins It is important to keep the fins clean of dirt and debris for maximum cooling efficiency Cylinder head head The finned aluminum part on
97. utch Hex Hub Fuel Tank Two Speed Access Plug Axle Carrier Suspension Arm Transmission Engine Shut off Pivot Ball Clamp S Toe Link Fuel Line Turnbuckle Spur Gear EZ Start Motor Steering Servo Rear Bumper 0 Shifting Servo Throttle Brake Servo Skid Plate Differential Wheelie Bar Shock Tower Bumper Mount Bulkhead ulkhea EZ Start Plug Body Mount Post Air Filter Ultra Shock Tuned Pipe i Oil Damper a a Racing Pressure Line see pg 18 for details Pipe Hanger Receiver Box Exhaust Header P k lt Chassis Driveshaft l Disc Brake Le OptiDrive Electronic Half Shaft r Shift Module Antenna Mount 6 e T MAXX 3 3 p 4 The following guide is an overview of the procedures for getting your T Maxx 3 3 running from opening the box to breaking in and tuning your engine Refer to the pages indicated for details on each step Look for the Quick Start logo on the bottom corners of Quick Start pages 1 Read the safety precautions on page 4 For your own safety understand where carelessness and misuse could lead to personal injury 2 Charge the EZ Start battery pack See page 26 The EZ Start requires a fully charged 7 2 volt battery pack sold separately 3 Install the antenna See page 13 Install the antenna mast on the T Maxx 3 3 4 Install
98. ve problems contact Traxxas Customer Support at 1 888 TRAXXAS or support traxxas com Note The wheelie bar is installed in the down position to help keep the front of the T Maxx 3 3 down during acceleration Apply throttle gradually to prevent wheelies during break in See page 40 for wheelie bar adjustment Drive the model with the body off Driving procedure Gently pull the throttle trigger to 1 4 throttle over a 2 second count Then gently apply the brake to stop Count the two seconds out while accelerating one thousand one one thousand two and then stop Operate the throttle trigger as smoothly as you can Repeat this starting and stopping procedure until the first tank of fuel is nearly empty Look for thick blue smoke exiting the exhaust outlet If there is no smoke richen the high speed needle 1 4 turn by turning the needle counterclockwise 4 When the fuel tank is nearly empty shut off the engine by pinching the fuel line connected to the carburetor use the installed clamp 5 Let the engine cool for 15 minutes Note If at any point the engine cuts out or stalls during gentle acceleration richen the high speed needle 1 4 turn by turning the needle counterclockwise N From tank 2 forward T Maxx 3 3 should be driven with the body on Driving procedure Gently pull the throttle trigger to 1 2 throttle over a 2 second count Then gently apply the brake to

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