Nitro Stampede
Contents
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4. OPERATING INSTRUCTIONS COVERS MODEL 4109 KC0532 RO1 Part 4199 Rev 090731 WARNING Carefully read and follow all instructions in this and any accompanying materials to prevent serious damage to your model Failure to follow these instructions will be considered abuse and or neglect INTRODUCTION Thank you for purchasing the Traxxas Nitro Stampede This manual contains the instructions you will need to operate and maintain your Nitro Stampede Look over the manual and examine the Nitro Stampede carefully before running it f for some reason you think the Nitro Stampede is not what you wanted then do not continue any further Your hobby dealer absolutely cannot accept a Nitro Stampede for return or exchange after it has been run Please read ALL of the operating instructions and precautions before attempting to drive the Nitro Stampede Even if you are an experienced R C enthusiast continue reading to learn about Nitro Stampede s unique features Pay special attention to the mechanical and safety precautions outlined in the manual If you have any questions about your new model feel free to call Traxxas technical support line toll free at 1 888 TRAXXAS 1 888 872 9927 Outside the U S call 972 265 8000 Technical support is available Monday through Friday from 8 30am to 9 00pm Central time Technical assistance is also available through our website at Traxxas com e mail us at support Traxxas com We hope that you will enj
5. and throttle on and off as smoothly as you can Sudden bursts or releases of the throttle can stall your engine Resist the temptation to tune the engine for performance and or run for extended times at wide open throttle Soon after about the fourth tank of fuel your patience will pay off with solid consistent performance During Break in Special break in fuels are not required Drive the model on a smooth hard surface If possible avoid running on very hot humid days Run with the body off for extra engine cooling Turn the mixture screw needle clockwise in to lean the mixture and counterclockwise out to richen the mixture Do not allow the fuel tank to run completely empty possibly leading to a burned plug An extremely low fuel level causes the fuel mixture to be too lean Keep extra glow plugs handy An extra glow plug has been included with your model The break in process because of the engine running rich can cause deposits to form on the glow plug leading to failure The First Tank of Fuel Drive the Nitro Stampede on a flat paved surface in an oval configuration This will cause you to naturally vary your speed over the entire rpm range During this break in time ease in and out of the throttle slowly to avoid stalling the engine The goal is to simply keep it running The fuel mixture setting may require slight adjustment to correct for different altitudes and temperature To te
6. 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 Model engine fuel especially when in fuel dispensing bottle may look like cool drink to a child Keep all fuel out of the reach of children at all times Do not place fuel containers on the ground where children can reach them while you are driving Model engine fuel is flammable Never allow smoking sparks heat or flame in the presence of fuel or fuel vapors 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 Nitro Stampede outdoors in a well ventilated area Never run the engine indoors Do not operate your Nitro Stampede at night or anytime your line of sight to the model may be obstructed or impaired in any way Never operate your Nitro Stampede in crowds of people or busy pedestrian areas Nitro Stampede is very fast and could cause injury to those unaware of its presence Keep small children at a safe distance away from the operating area Because Nitro Stampede is controlled by radio it is subject to radio interference from many sources beyond your control Since radio interference can cause momentary loss of contr
7. BUIDIUUOD 34 Jo do aui pue uoisid y u6nouui 1suM y 31959 bun2euuo y JO pue do 34 101522 jo dolp e aejd uoisid pue bun euuo aui e quiesse SZ 4315 mnn T TD qm s v LOI TLE TRAXXAS TRX 2 5R RACING ENGINE LifetimejEngine GIALLE aes CHEL TOT DOT LETTRE RUIT CRED Red B TD amp MHT me f neu Exchange a worn Traxxas engine for a brand new TRX 2 5R Racing Engine it s an affordable convenient no questions asked program Exchanges can be made in your local hobby shop or directly through Traxxas It s less expensive than rebuilding the engine with separate parts Know that it s done right Traxxas replacement engines are brand new not refurbished for factory fresh performance The program uses our top of the line TRX 2 5R Racing Engine for all exchanges Includes the latest performance upgrades and blue machined head Pro 15 engines Specially priced sta EE Im Racing Engine The upgrade packages a Depending on the application the Major components come pre assembled and pre adjusted Just bolt TRX PRO I5 UPGRADE KITS Upgrade kits are available for TRX FET upgrade conversion packages allow E easy installation of the new TRX 2 5R contain all the items necessary for a pi BRU complete factory style conversion pac
8. the battery pack Do not burn or puncture the batteries Toxic materials could be released If eye or skin contact occurs flush with water Store the battery pack in a dry location away from heat sources and direct sunlight Nickel Metal Hydride batteries must be recycled or disposed of properly OTHER REQUIRED EQUIPMENT To operate the Nitro Stampede you will need these additional items All of these items should be available from your hobby shop 1 12 AA size batteries for your transmitter 8 and receiver 4 2 Small Phillips head and flat screwdrivers for adjustments 3 After run oil to protect the engine from corrosion THE TQ RADIO SYSTEM The Nitro Stampede Model 4109 is equipped with the 2 channel radio system The following radio system terms will be used throughout the rest of these operating instructions Channel The 27 MHz megahertz frequency band is divided into six channels so that up to six models can be operated simultaneously Each channel is referred to by its flag color and channel number as shown below 27MHZ FLAG COLOR CH TRAXXAS PART 26 995 BROWN 1 2031 27 045 RED 2 2032 27 095 ORANGE 3 2033 27 145 YELLOW 4 2034 27 195 GREEN 5 2035 27 255 6 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 an
9. two switches One for throttle and one for steering Moving the switches reverses the direction of the corresponding servos For example if you turn your steering wheel right and the model moves left then switch the steering servo reversing Switch to correct the servo direction You may need to adjust the corresponding trim control after moving the servo reversing switch PREPARING RUN Charging the EZ Start battery The included charger can be used to charge the included battery pack Do not leave the battery unattended while charging 1 Plug the charger into the wall The LED on the charger should glow green 2 Connect the included EZ Start battery pack to the charger output cord The LED will glow red indicating the battery is charging 3 The battery should charge for approximately 4 7 hours The LED will turn green when the battery is fully charged Green LED hi Red LED Green LED Installing the EZ Start battery 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 Twistthe 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 Snapthe battery compartment door back on and lock the end tab D USING THE
10. EZ START Your EZ Start controller plugs into a 4 prong receptacle on the battery cover of your Nitro Stampede 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 and 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 If the Glow Plug LED fails to light the glow plug may be bad or the glow plug wire may be damaged or disconnected 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 off the power to the motor Allo
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12. ance Continue this procedure until one of the following conditions exists 1 There is no longer any performance improvement 2 The engine begins to cut out at high speed 3 There is a sudden loss of power during acceleration 4 The engine begins to overheat see Tuning the Engine by Temperature for symptoms of overheating If any one of the above conditions occurs the fuel mixture is already past the maximum safe lean setting Richen the fuel mixture to the optimum setting by richening the high speed needle at least 1 8 turn counterclockwise and retest This setting will extend engine component life Low Speed Fuel Mixture Adjustment The low speed mixture is always set after the high speed needle is correctly adjusted The low speed mixture will be set using the pinch test 1 Once the engine is warm do several high speed runs to confirm that the high speed needle is set correctly 2 Bring the vehicle in and pinch closed the fuel line going into the carburetor The engine should run for 2 3 seconds speed up and then die 3 It is very important to make several high speed runs with the Nitro Stampede between adjustments to clear out any excess fuel Perform the pinch test immediately after If the engine is allowed to idle for a long period of time it could load up with fuel and give you an inaccurate measurement from your pinch test 4 If the engine runs longer than 3 seconds then lean the low speed needle 1 16 turn make s
13. blade screwdriver to rotate the flywheel Place the blade of the driver into one of the grooves of the flywheel and push down turning the flywheel counterclockwise when viewed from the front The flywheel should turn freeing 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 LIMITED WAHHANTY INFORMATION Electronic Components Traxxas electronic components are warranted to be free from defects in materials and workmanship for a period of thirty 30 days from the date of purchase Electronic components consist of the radio system transmitter receiver servos switches AC chargers adapters and receiver battery holders and any other Traxxas electronic component See the additional limitations that apply Chassis and Engine The chassis consists of all remaining parts of the model that are not considered electronic or part of the engine This includes recoil starters the EZ Start system and controller starter components and the glow plug The Nitro Stampede is considered to be a race oriented hobby class model We have made every ef
14. djust the alignment Remove the rubber exhaust pipe and the tuned pipe Remove the electric starter drive Loosen the four 3x8mm cap head screws which hold the slotted adjusting plates to the engine mount Camber The camber angle of both the front and rear wheels can be adjusted with the camber rods upper turnbuckles Use a square or right angle triangle to set the camber accurately Adjust the front wheels to 0 degrees of camber wheel perpendicular to the ground In the rear adjust the wheels to 1 to 2 degrees of negative camber These adjustments should be set with the truck positioned at its normal ride height Positive Remove the large E clip on the clutch shaft and the clutch bell gear Remove the ball bearings and install them in the new clutch bell gear Reinstall the clutch bell gear and E clip Note Smaller clutch bell gears use smaller ball bearings Refer to your parts list for the correct bearings Reinstall the spur gear on the top shaft and secure it with the 4mm locknut Negative camber Shocks The four shocks on Nitro Stampede have the most 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 pairs 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 a lightweight oil will at one point give
15. dle bars Carburetor Dirt is the main enemy to your carburetor If you notice a sudden change in the fuel mixture lean and performance of your model you may have dirt lodged in the carburetor To dislodge a dirt particle in your carburetor try screwing the high speed needle all the way in and then back out to its original settings If the engine doesn t return to normal operation then try backing the mixture screw out and priming the engine to force fuel through the carburetor Return the mixture screw back to its original settings The engine will be flooded at this point so follow the directions for relieving a flooded engine If this fails then the carburetor will need to be removed and cleaned with denatured alcohol Do not blow on carburetor passages or fuel lines with your mouth Fuel and solvents are extremely poisonous To prevent this from occurring again insert a fuel filter in the line between the tank and the carburetor 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 an 8mm 5 16 nut driver and verify that the piston is at the top of its stroke 2 Use flat
16. e EZ Start controller 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 pressing the primer button built into the fuel tank several times until the fuel moves through the fuel line towards the carburetor Be sure to watch the fuel line going into the carburetor closely to see when the fuel reaches the carburetor Once it reaches the carburetor press the primer button one more time If you press the primer button too many times you will flood the engine and the EZ Start will not be able spin it over 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 BHEAKING IN THE ENGINE VERY IMPORTANT Once your engine is running it must be broken in The key to breaking in your engine is patience The brealcin time will take about 1 to 1 2 hours During the break in period your engine may appear to malfunction with symptoms such as stalling inconsistent performance and fouled glow plugs Don t give up on it These are just break in pains that every new engine has to go through They will disappear once you get through the break in period Just keep it running
17. e 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 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 7 Connect the EZ Start controller to the model and spin the engine for 10 seconds 8 Remove the rag or paper towel and repeat steps 5 7 two more times 9 Clean and re oil the air filter so it will be ready for use next time 10 Replace the glow plug reconnect the glow plug power wire and reinstall the air filter MAINTENANCE Nitro Stampede requires timely maintenance in order to stay in top running condition Neglecting the maintenance could allow dirt deposits and moisture to build up inside the engine leading to internal engine failure The following procedures should be taken very seriously After each hour of running Clean and re oil the air filter The instructions for this procedure are on page 5 We cannot stress enough the value of cleaning your air filter at the scheduled intervals The cleanliness and condi
18. ea is operating on the same channel D receiving stray signals and running out of control Slide the transmitter switch to the on position A steady red light should illuminate A flashing red light indicates weak batteries Weak batteries will limit the range of the radio signal between your transmitter and receiver Loss of the radio signal can cause you to lose control of the truck 2 Always turn the transmitter on first and off last This will prevent the model from NOTE Never turn the transmitter or receiver off while the engine is running The model could run out of control The on off switch only turns the receiver on and off It does not turn off the engine 3 Turn the truck on The switch is located on the chassis The servos should jump and move to their idle neutral positions 4 With the front wheels off the ground operate the steering control on the transmitter channel 1 Check for rapid operation of the steering servo and that the steering mechanism is not loose or binding If the servo operates slowly check for weak batteries Turn the steering trim control on the transmitter to adjust the servo so that the front wheels are pointing straight ahead Check to be sure that the wheels do not turn more in one direction than in the other Wheels pointing straight ahead 5 Operate the throttle trigger on the transmitter to ensure that the throttle servo is operating properly When the
19. ear with no pin hole leaks Check for dirt blockage in the carburetor fuel inlet and high speed needle seat Install inline fuel filter Air bubble in the fuel Prime the engine to force the air through Check for pinhole leaks in the fuel line Insufficient fuel tank Replace the pressure hose between pipe and fuel tank clear blockage in the tuned pipe hose fitting check flow to and from tank Check fuel tank cap seal Engine overheated e Allow engine to cool find cause for overheating Engine overgeared for application Use a lower gear ratio page 8 Engine clutch slipping Replace clutch shoes see engine repair section page 13 Drive system is bound s Locate the bound item and repair Engine excessively worn ss Repair or replace engine page 12 Cooling air to the head is blocked Cut ventilation holes in the body windshield Excessive load on the Check for bound drivetrain Broken clutch shoe spring Replace clutch shoe spring page 13 Loose flywheel serene Replace flywheel nut page 13 EZ Start motor pinion stripped Replace EZ Start motor 11 QA39J S BU JO aui 0 UOJSId y jo uone o DY 3JEJIPU
20. ening Use only 100 pure silicone shock oil to prolong seal life The ride height for Nitro Stampede can be adjusted by adding or removing the clip on spring pre load spacers Instead of adding spacers to increase stiffness use stiffer springs Adjust the ride height so that the suspension arms are slightly above being parallel to the ground Observe how the Nitro Stampede handles in turns If it is picking up the inside rear wheel in hard turns then stiffen the front suspension If it is picking up the inside front wheel in hard turns then stiffen the rear suspension Proper set up will add stability and help prevent roll overs Gear Ratios ADJUSTMENTS A unique Nitro Stampede feature is the ability to change the gear ratios The final drive ratio of the gearbox is 3 75 to 1 Use the Toe in following formula to calculate the overall ratio Geometry and alignment specs play an important role in your Number of Spur gear teeth truck s handling so take the time to set them correctly Set the steering trim on your transmitter to neutral Now adjust your tie rods so that both wheels are pointing straight ahead and are parallel to each other 0 degrees toe in This will ensure the same amount of steering in both directions If you run out of adjustment then the steering servo will have to be re centered see centering your servos on page 9 For increased stability add 1 2 degrees of toe in to each front wheel Use the turnbuckles to a
21. enters the engine at idle and low throttle This adjustment will smooth the idle and improve acceleration to mid speed Make this adjustment with the throttle closed after setting the idle Gently turn this screw clockwise until it stops against the needle seat Be very careful it s difficult to know when the needle has seated due to the thread holding material on the needle s thread Overtightening of the screw may result in damage to the needle seat Now turn the low speed mixture screw counterclockwise 13 4 turns 5 Shutting Off the Engine Before starting the engine it is important to know how to shut it off The correct method is to pinch and hold the carburetor s fuel line at idle speed until the engine dies Starting the Engine Before you start your engine for the first time make sure you have read all instructions and precautions in this manual Pay close attention to the 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 cooler than room temperature outside remove all fuel and keep your model indoors until you re ready to start it and then take it outside We do not recommend running the model in temperatures below 35 F 1 Turn on the radio system 2 Make sure the throttle trigger on the transmitter is in the idle neutral position 3 Connect th
22. erature 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 temperature 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 Part 4091 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 t
23. everal more high speed runs and retest 5 If the engine dies immediately without speeding up then richen the low speed needle 1 8 turn make several more high speed runs and retest 6 If the engine dies when you try to accelerate abruptly then the low speed needle is probably set too lean Richen the low speed needle 1 8 turn make several more high speed runs and retest 7 When the low speed needle is set correctly the engine s throttle response should be very quick Idle Speed Adjustment Once the high and low speed mixtures have been set reduce the idle speed to the minimum reliable idle speed Remember this adjustment should be made while the engine is running at normal operating temperature 1 Turn the throttle trim on the transmitter so that the brakes are applied This ensures that the throttle barrel is resting against the idle adjustment screw 2 If necessary remove the air filter to gain access to the idle adjustment screw 3 Turn the screw clockwise to reduce the idle speed or counterclockwise to increase it The idle speed should be set as low as possible while still maintaining reliable running characteristics 4 Reset the throttle trim on the transmitter Fine Tuning the Carburetor After fine tuning your 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 at the time you finished fine
24. ffect 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 Nitro Stampede that receives signals from the transmitter and relays them to the servos Servos Small motor units in your Nitro Stampede that operate the throttle and steering mechanisms Two channel radio system The radio system consisting of the receiver the transmitter and the servos The system uses two channels one to operate the throttle and one to operate the steering Transmitter The hand held radio unit that sends throttle and steering instructions to your Nitro Stampede Trim The fine tuning adjustment of the neutral position of the servos made by turning the throttle and steering trim knobs on the face of the transmitter INSTALLING TRANSMITTER BATTERIES Install 8 AA batteries into the bottom of the transmitter as shown in the drawing INSTALLING RECEIVER BATTERIES The receiver battery holder is located underneath the battery cover Remove the battery cover by removing the two body clips from the posts on both sides of the battery holder Install four AA batteries into the batte
25. fort in component design material selection and assembly to make our products as durable as possible Because our products are high performance hobby class models that operate at a much higher level 10 of performance than a toy require periodic maintenance and are intended to be used in high performance applications over an extremely wide range of running conditions and situations no warranties are expressed or implied that cover damage caused by normal use or wear or cover or imply how long any chassis or engine part will last before requiring replacement due to wear Parts will wear from use and occasionally require replacement Engines and chassis are only covered against manufacturer s defects in materials workmanship or assembly when they are new before being used If any component is found to be defective incorrectly made or incorrectly assembled within the warranty coverage time period where applicable it will be repaired or replaced at Traxxas sole discretion This will be done within a reasonable time period and free of charge If you believe a defect in materials workmanship or assembly was not apparent when the product was new and only became evident after the product was used then please call us at 1 888 TRAXXAS We stand behind our products and reputation and pledge to do our best to make sure you are satisfied with your Traxxas product Limitations Any and all warranty coverage does not cover replacement of part
26. h a dispensing tube is required to fill the fuel tank The fuel tank in the Nitro Stampede has a capacity of 75cc The fuel bottle should always be capped to prevent the fuel from evaporating and becoming contaminated with debris or moisture The alcohol and nitro contents of the fuel will evaporate thus upsetting the fuel balance and spoiling the En fuel Do not use old or dirty fuel Part 5001 PERSONAL SAFETY PRECAUTIONS Every precaution outlined in this manual needs to be followed to help ensure safe operation Operate your model sensibly and with care and it will be exciting safe and fun for you and your spectators Failure to operate your model in a safe and responsible manner could result in property damage and serious injury You alone must see to it that the instructions are followed and the precautions are adhered to The Nitro Stampede is not intended for use by children without the supervision ofa responsible adult Traxxas shall not be liable for any loss or damages whether direct indirect special incidental or consequential arising from the use misuse or abuse of this product and any chemical or accessory required to operate this product Nitro Stampede is very fast Children under 16 years of age and inexperienced drivers should not operate the Nitro Stampede without the supervision of a responsible and knowledgeable experienced adult Model engine fuel is dangerous and highly poisonous Always follow all
27. he motor wires from the EZ Start motor Push the EZ Start button for several seconds This lights the glow plug and burns off any remaining fuel Reconnect the EZ Start motor 10 Do not prime the engine Partially open the throttle and press the EZ Start button The engine should start immediately so Glow Plugs The glow plug in your engine is a consumable item which must be replaced periodically to maintain peak performance and starting ease An extra glow pug has been included with your model If the Glow Plug LED fails to light the glow plug may be bad broken However glow plug performance can deteriorate significantly before the element actually burns in two The only sure way to test for a faulty glow plug is to replace it with a new one to see if the problem goes away You can view the glow plug element by removing it and touching it against the engine head while pressing the EZ Start button The glow plug will not light unless it is grounded against the engine Glow plugs can be damaged by particles in the combustion chamber or by running the fuel mixture excessively lean Traxxas makes three glow plugs The standard hot plug part 3230 is the stock replacement plug for TRX Pro 15 engines The optional heavy duty part 3231 and super duty part 3232 plugs will last longer in most cases however it is a medium temperature plug so performance may be reduced slightly Do not use plugs with i
28. he 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 windshield 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 from 10W to 50W available from your hobby shop The thinner viscosity oils or less flow more smoothly and are more consistent while thicker oils provide more damp
29. ing the engine beyond the safe allowable limits will result in poor performance and engine damage Indications of an overly lean mixture include Cutting out or sudden loss of power during acceleration Overheating temperature beyond 300 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 slightly rich atthat setting and you can then retune for performance Always tune for performance by starting rich and moving 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 There is unburned fuel spraying from the exhaust tip Leaning the high speed fuel mixture increases performance 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 with the Nitro Stampede after each adjustment to clear out the engine and note any change in perform
30. kages include items such as the engine mounts linkage exhaust header pipe and other required components specific to each model them on Nitro Stampede upgrade kit is part 4400 Each kit is shown at www Traxxas com erp FORMS DETAILS AND DEALER LOCATOR ARE Contact Traxxas Support at Qe XX jul DIS to learn more about the Traxxas Lifetime Engine Replacement Plan HERE P OWER MEETS TECH NOLOGY Traxxas 1100 Klein Road Plano Texas 75074 1 888 TRAXXAS 1 888 872 9927 If you are outside the U S call 972 265 8000 www Traxxas com ONLINE AT WWW TRAXXAS COM ERP
31. lipping Remove EZ Start Clean or replace bearing page 12 EZ Start gears Listen for excessive gear noise Replace gears motor Glow plug wire loose from glow plug Crimp the connector on the glow plug wire Glow plug wire damaged Replace or repair glow plug wire Leaking glow plug 9 Check glow plug gasket tighten glow plug Glow plug fouled or Check for two solid green lights when the EZ Start button is pressed No GLOW PLUG light indicates a faulty plug Replace with Traxxas 3230 3231 or 3232 glow plugs page 9 Engine flooded ettet Clear the engine of excess fuel page 9 Engine overheated ss Allow engine to cool find cause for overheating Exhaust blocked rites Clear any obstructions Air cleaner plugged Clean and replace air cleaner element page 5 Carburetor incorrectly adjusted Readjust carburetor to factory break in settings page 5 High speed fuel mixture is too Lean the high speed mixture page 7 High speed fuel mixture is too lean Richen the high speed mixture page 7 Idle speed set too low Increase idle speed page 7 Fuel flow blocked Check that all fuel lines are cl
32. ll if the engine is running rich high volume of fuel flowing through the engine look for the following conditions 1 The engine should accelerate sluggishly 2 There should be a thick trail of blue smoke coming from the exhaust 3 Ifyou do not observe the conditions above then turn the high speed needle out 15 counterclockwise and retest 4 Donotrev the engine with the wheels off the ground High no load rpm can damage the engine usually resulting in a broken connecting rod At the end of the first tank of fuel stop the engine and allow it to cool for 5 10 minutes before proceeding Rich setting Tank 1 15 Tank 2 LL Tanks Two Through Four Shut off the engine and allow it to cool for 5 10 minutes then refuel Turn the high speed needle in 15 clockwise Turn on the radio system and restart the engine Continue driving on your oval course varying your throttle until the second tank of fuel is used up Repeat this process for tanks three and four Important Do not lean the high speed mixture less than 2 turns out from closed see illustration Also be sure to allow the engine to cool between each run 2 turns out 15 Tank 3 15 Tank 4 Slightly rich speed testing This amount will vary on each engine y Gi Correct setting Performance at 90 b Maximum lean position 2 turns out DRIVING PRECAUTIONS The radio system is not waterproof A
33. ll not tighten or you are seeing signs of wear on the face of the gear then the pegs should be replaced 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 of compression Symptoms include the engine being difficult to start when warm stalling when warm and stalling when throttle is suddenly closed to idle Replace the wrist pin and G clip whenever the piston and sleeve are replaced ENGINE TROUBLESHOOTING The troubleshooting guide on the following pages has been provided to help you in diagnosing and repairing common engine problems Most difficulties with engines can be traced back to problems with adjustment fuel quality dirt blockage or common parts that wear with everyday use Flooded Engine The engine can become flooded if it is primed too many times during the course of a routine start up When the engine is flooded the EZ Start cannot turn the engine and it will appear to be locked Use the following procedure to clear a flooded engine Remove the blue glow plug wire Remove the glow plug with a 5 16 or 8mm nut driver Plug in the EZ Start and turn the truck upside down Push the EZ Start button for several seconds to clear the excess fuel from the combustion chamber Turn the truck over and re install the glow plug with gasket Reconnect the blue glow plug wire Remove one of t
34. ol always allow a safety margin in all directions around your model to prevent collisions 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 Most importantly use good common sense at all times Batteries and Battery Charging Your model uses rechargeable batteries that must be handled with care for safety and long battery life Make sure to read and follow all instructions and precautions that were provided with the battery packs and your charger It is your responsibility to charge and care for the battery packs properly In addition to your battery and charger instructions here are some more tips to keep in mind Use the supplied charger to charge the included battery See Charging the EZ Start Battery on page 5 Never leave batteries to charge unattended Allow the battery pack to cool off before charging Do not use battery packs that have been damaged in any way Do not use battery packs that have damaged wiring exposed wiring or a damaged connector Children should have responsible adult supervision when charging and handling batteries Only use approved chargers for NiMH battery packs such as Part 2921 or the Traxxas TRX Power Charger Part 3030X Do not exceed the maximum charge rate of 1 amp Do not short circuit the battery pack This may cause burns and severe damage to
35. on your 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 common household lubricant To ensure your 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 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 model 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 th
36. other area if your channel is already being used Crystal X tal The plug in device that determines on which channel the radio system will operate 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 Nitro Stampede 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 RED POSITIVE ANTENNA CELL 4 BATTERY HOLDER 3170 CHANNEL 2 BATTERY WIRE COLORS EN BLACK CHANNEL 1 RED STEERING SERVO WHITE Antenna Throttle Neutral Adjust Throttle Trim Steering Trim Throttle Trigger Power Switch Battery Compartment Servo Reversing Switches Power Indicator Steering R Throttle L NiCad Abbreviation for nickel cadmium The original rechargeable hobby pack NiCad batteries have very 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 e
37. oy many hours of fun with your new Nitro Stampede Previous experience with radio controlled models is recommended Models require a higher level of setup maintenance or support equipment FUEL Fuel is the most critical component for making your engine perform properly Improper fuels will cause hard starting poor performance and excessive wear on the engine For the best performance from your TRX Pro 15 engine use Traxxas Top Fuel Traxxas Top Fuel is the only model engine racing fuel which exceeds all of the Traxxas engine warranty requirements It is specially formulated to resist heat and is guaranteed to provide the best performance and longest life from your Traxxas engine Top Fuel uses superior natural and synthetic lubricants in just the right amounts to deliver the crisp clean throttle response and screaming top end performance you want in a car fuel without sacrificing long term durability Top Fuel s consistency and reliability has been proven in thousands and thousands of engines so you can trust it in your engine with confidence Traxxas cannot guarantee the quality and consistency of other manufacturers fuels Some fuels are capable of destroying your TRX Pro 15 engine If you must use a fuel other than Traxxas Top Fuel contact Traxxas first at 1 888 TRAXXAS to find out if the fuel is safe for use with TRX engines FUEL BOTTLE Fuel is usually purchased by the gallon or quart so smaller bottle wit
38. ry holder Alkaline batteries should be used Place the 2 2 battery holder into the battery cover with the cushioning foam Secure the battery cover to the chassis using the two body clips as shown ANTENNA SETUP Locate the plastic tube and the antenna tip supplied in the bag with your instructions Insert the black antenna wire extending from the receiver housing into one end of the tube and push it all the way through Spray the wire with glass cleaner to make it easier to insert Insert the tube into the antenna mount in the side of the chassis Fold the remaining antenna wire over the top of the antenna tube and secure it with the vinyl antenna tip yp Under no circumstances should you ever cut your antenna wire Its length is specially tuned to the frequency band and cutting it could severely shorten the radio s range On the transmitter fully extend the chrome telescopic antenna RADIO SYSTEM OPERATION Your radio system was pre adjusted before it left the factory however the adjustment should be checked prior to running the truck 1 Before you ever turn your radio system on you must clear your frequency There are six different channels numbered 1 through 6 Each of the six channels is represented by a color Look at the crystal in the back of the transmitter to determine on which of the channels your truck is operating Clearing your frequency means checking to be sure that no one else in the ar
39. s and components damaged by abuse neglect improper or unreasonable use crash damage water or excessive moisture chemical damage improper or infrequent maintenance accident unauthorized alteration or modification use of improper fuels or items that are considered consumable Traxxas will not pay for the cost of shipping or transportation of a defective component from you to us Your Hobby Dealer s Role All warranty claims are handled directly by Traxxas Your dealer can assist you in contacting Traxxas and determining which components might be defective but he is under no obligation to provide free replacement parts or service Traxxas does not authorize dealers to make over the counter exchanges or refunds for Traxxas products that have been used Traxxas will make the sole and final determination if a product or component can be covered under warranty Limitations of Liability Traxxas makes no other warranties expressed or implied Traxxas shall not be liable for any special indirect incidental or consequential damages arising out of the assembly installation or use of their products or any accessory or chemical required to use their products By the act of operating using the product the user accepts all resulting liability In no case shall Traxxas liability exceed the actual purchase price paid for the product Traxxas reserves the right to modify warranty provisions without notice All warranty claims will be handled directl
40. servo is in the neutral position the carburetor should be in its idle position you will adjust the engine idle speed later When the throttle trigger is pulled all of the way the carburetor should be in the fully open position When the throttle lever is pushed forward the brake should be locked and the throttle should not close any further than when at idle RANGE TEST THE HADIO There are many things such as buildings power lines radio transmitters etc which can adversely affect the performance of your radio system To make sure you do not have a runaway model range test the radio system With the radio system on and working hold the truck and have a friend carry the transmitter away from you the distance you plan to run the truck Have the friend operate the controls on the transmitter to be sure that everything is working at full range RADIO SYSTEM ADJUSTMENTS Throttle Neutral Adjust The throttle neutral adjustment is located on the transmitter face and controls the forward and reverse travel of the throttle trigger There are two settings 50 50 which allows equal travel for both forward and brake and 70 30 which allows more travel for throttle and less for brake Change the adjustment by pressing the button and sliding it to the desired position 50 50 is the recommended setting while running the Nitro Stampede GER TL TRIG TON VEM ENT Servo Reversing Switches On the front of the transmitter there are
41. t Traxxas com For orders and other information call 972 265 8000 ENGINE TROUBLESHOOTING GUIDE Engine will not start EZ Start motor will not turn EZ Start turns but engine does not Engine starts and then stalls Engine sluggish poor performance Engine Overheats Engine chokes hesitates at speed Engine stalls under hard acceleration Engine stalls around turns Engine stalls during normal driving ANA Ui M 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 essa E E EE T Fill fuel tank Fuel level is 10 5 Refill fuel tank Improper or contaminated fuel Replace fuel Excessive nitro in the Use fuel with a lower nitro content page 2 Incorrect oil content in the Switch to a recommended brand of fuel page 2 Poor quality f el ree Switch to a recommended brand of fuel page 2 Engine not primed ee Prime engine page 6 EZ Start battery not charged Use freshly charged battery page 5 EZ Start ground wire yellow faulty Clean tighten or replace ground wire page 12 EZ Start motor wire loose sss Check motor connections on the EZ Start motor One way starter bearing s
42. t with dish soap and rinse Next saturate it with oil and then squeeze out the excess oil Filling the Fuel Tank Use a small fuel bottle or bulb to put fuel into the tank Only fill the tank to the bottom of the fill neck The Nitro Stampede can be carefully refueled while the engine is running NOTE Your carburetor has been factory preset for break in Do not re adjust your carburetor settings unless you suspect a problem The following steps are for reference only High Speed Mixture Setting The high speed mixture screw controls how much fuel enters the engine during mid and high speed operation Turn the high speed mixture screw clockwise by hand until it stops Do not tighten or the needle may be damaged Now turn the mixture screw counterclockwise 2 2 complete turns AIR INTAKE Setting the Idle Speed The idle screw regulates the throttle lt _ opening to control the idle speed The throttle opening at idle should be set as shown in the drawing The opening should be 1 to 11 2 millimeters at the widest point in the opening The engine may not idle well until it is warmed IDLE SPEED SCREW HIGH SPEED MIXTURE SCREW LOW SPEED MIXTURE SCREW ecce THROTTLE THROTTLE THROTTLE CLOSED ATIDLE OPEN Low Speed Mixture Setting This screw meters the fuel at low speeds The low speed mixture screw is located in the end of the carburetor inside the throttle arm This screw controls how much fuel
43. ten the slipper nut clockwise until it stops and then back the nut out 1 4 of a turn If you notice any decrease in performance after making changes to the slipper clutch adjustment then it may be too loose The slipper must not be allowed to slip during normal acceleration or the slipper could be damaged Centering your Servos Whenever your radio system has been removed for service or cleaning the servos must be re centered prior to installing the radio system in the model If the radio system is installed in the truck disconnect the servo horns from the servos Connect the steering servo to channel 1 on your receiver and the throttle servo to channel 2 The white wire on each servo cable is positioned towards the crystal Connect the red and black cable from the battery holder to the batt terminal on the receiver The red wire is positive and the black wire is negative Place fresh AA batteries in the transmitter and turn the power switch on Slide the throttle and steering trim adjustments to the center position Now install fresh AA batteries into the battery holder and turn the power switch to the on position The servos will automatical y jump to their center positions Turn off the battery holder switch followed by the transmitter The servos are now ready to be installed Be careful not to move the servo shaft when reinstalling the servo horns AFTER RUN PROCEDURE You must perform after run maintenance
44. tion of your air filter directly influences the running life span of your engine Do not skip air filter maintenance Clean the outside of the engine of accumulated dirt oil and grime Accumulated grime will decrease the engine s ability to cool itself Tighten the wheel nuts especially on the left side After each running session Perform after run maintenance on the engine This clears the engine of destructive moisture and other corrosive deposits This is extremely important for the life of the engine Inspect the gears for wear broken teeth or debris lodged between the teeth Inspect the vehicle for obvious damage or wear Look for 1 Loose or missing screws 2 Cracked bent or damaged parts 3 Cut or loose wiring 4 Cut or kinked fuel lines 5 Signs of fuel leakage Other periodic maintenance Connecting rod The connecting rod should be replaced when the piston and sleeve are replaced Also replace the piston wrist pin and G clip whenever the connecting rod is replaced As with other internal engine components connecting rod life depends on engine s usage and the quality and frequency of the engine maintenance Inspect the connecting rod after three gallons of fuel have been used Slipper clutch pads friction material The slipper clutch pegs will wear over time and require replacement The life of the pegs depends on how the slipper clutch was adjusted and how the Nitro Stampede was used If the slipper wi
45. 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 then the air density is Slightly more dense Slightly less dense Less dense More dense More dense Less dense More dense Less dense the overall mixture should be Slightly richer Slightly leaner Leaner Richer Richer Leaner Richer Leaner Richer Leaner Lower Higher Lower Higher Lower Higher Lower Higher Lower Higher Humidity Pressure barometer Temperature Altitude Nitro 96 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 temp
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47. void driving through puddles wet grass or mud Water could damage the electronics Do not continue to operate the Nitro Stampede with low batteries After the battery power drops below a certain point the model will continue with the last command it had from the transmitter Indications of low battery power include slow operation and sluggish servos On the transmitter a flashing red light indicates low transmitter batteries Do not drive the Nitro Stampede at night on public streets or in large crowds of people If the truck becomes stuck do not continue to run the engine Remove the obstruction before continuing to drive Do not attempt to push or tow objects with the Nitro Stampede The model is controlled by radio It is subject to radio interference from many sources beyond your control Since radio interference can cause momentary losses of control allow safety margin around the truck in order to prevent collisions Use common sense whenever you are driving your model Intentionally driving in an abusive and rough manner will only result in poor performance and broken parts Tuning Your Engine for Best Performance 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 Never run the engine too lean not enough fuel flow Lean
48. w at least three 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 Use a Strong Starter Battery 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 STARTING THE ENGINE Installing the Air Filter Remove the protective cap from the carburetor air intake Install the rubber air filter base and pre lubed foam element onto the carburetor intake The foam air filter element may be cleaned and reused Always be sure the filter element is oiled properly before running the engine For the best filtration use the type of oil made for foam air filters Traxxas air filter oil is recommended part 5263 Lightweight motor oil or after run oil may also be substituted When the element gets dirty clean i
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50. y by Traxxas The Traxxas warranty gives the customer specific legal rights and possibly other rights that vary from state to state The customer is required to fill out and return the Registration Card enclosed with the product as a condition of the coverage and performance of the warranty All dollar amounts stated are in United States dollars The term lifetime shall refer to the product s production life at Traxxas Traxxas is not obligated to provide upgraded products at a reduced rate when a previous product s production cycle has ended To Obtain Warranty Service Call us first Before you begin the process of obtaining warranty or repair service please call us at 1 888 TRAXXAS and speak with one of our friendly and knowledgeable support technicians Often a product might appear defective or to malfunction only because it is being used improperly or requires a simple adjustment One phone call to our experienced support staff just might get you back running quickly and easily When you return a product to Traxxas please provide the following Proof of purchase indicating the date purchased Any applicable forms Return address Daytime and evening phone numbers E mail address Brief description of the problem and mail or ship to TRAXXAS 1100 Klein Road Plano Texas 75074 For technical assistance regarding your model call 1 888 TRAXXAS 872 9927 972 265 8000 outside of the U S or e mail Traxxas at suppor
51. you the same dampening as a three hole piston with heavier oil We recommend using the two hole pistons with a range of oil viscosities Adjusting the Slipper Clutch PRE LOAD SPACERS while the engine is running 8 x 3 75 Final drive ratio Number of Clutch Bell gear teeth Nitro Stampede comes with a 66 tooth spur gear and a 18 tooth pinion clutch bell gear This combination will provide the best overall acceleration and top speed If you want more acceleration and less top speed then use smaller clutch bell gear fewer teeth For more top speed use a larger clutch bell gear Changing the Clutch Bell and Spur Gears Remove the 4mm nylon locknut and the spring from the slipper clutch Try to remove the slipper clutch as one assembly by holding the pressure plates together with your thumb and index finger Slide a strip of thin note paper between the spur gear and the clutch bell gear Push the clutch bell gear against the spur gear and tighten the 3x8mm adjusting plate screws Remove the paper and the gear mesh should be correctly adjusted The Nitro Stampede features an adjustable slipper clutch on the spur gear to protect the drivetrain from sudden shock loads such as landing off of jumps with the engine at full throttle Under normal conditions the slipper clutch should not slip Before adjusting the slipper clutch turn the model off Do not adjust the slipper clutch Use the supplied wrench to tigh
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