Professional Shop Manual “A” and “B” Series Mowers
Contents
1. 7 Disconnect the harness from the engine connector See Figure 6 14 8 Install the harness by following the previous steps in reverse order NOTE Use new wire ties to secure the harness to the handle bars 9 Test run the mower in a safe area before returning it to service Figure 6 14 33 A and B series mowers Schematic 40A El FUSE SOCKET o LI UE Ll 12V CHARGER 1 ATT Figure 6 15 34 hH KEY y SWITCH OPC BLADE BRAKE SWITCH ENGINE STARTER ASSEMBLY por2. To remove replace the belt 1 10 Remove the blade by following the steps described in the blade section of this chapter NOTE Keep the mower on its side Remove the engine mounting screw that secures the engine baffle using a 1 2 wrench See Figure 2 6 Slide the neck of the baffle out of the deck opening Rotate the baffle until the opening in it lines up with the blade adapter See Figure 2 7 Remove the baffle Remove the blade adapter while slipping the belt off of the pulley NOTE There may or may not be washers and or a spacer above the blade adapter depending on the engine installed on the mower If there are note the order they came off so they can be installed the same way Engine mounting screw f iF Deck opening eN j F y j i Fi F Y A SN Blade adapter M i Figure 2 7 Blade and Belt 7 Slip the belt over the crank shaft See Figure 2 8 Figure 2 8 8 Remove the seven screws that hold the transmission cover to the mower See Figure 2 9 Figure 2 9 9 Remove both front wheels 0 10 Remove the two screws on each side that holds the ay TS belt cover to the front sub frame See Figure 2 10 2 screws A 41 Remove the transmission cover El l r sl A m f Figure 2 10 11 A and B series mowers 12 Unhook the wire form belt guide from the post on the transmission 13 Lift the belt guide off of the transmission 14 Remo
3. For A Growing World MTD Professional Shop Manual A and B Series Mowers NOTE These materials are for use by trained technicians who are experienced in the service and repair of outdoor power equipment of the kind described in this publication and are not intended for use by untrained or inexperienced individuals These materials are intended to provide supplemental information to assist the trained technician Untrained or inexperi enced individuals should seek the assistance of an experienced and trained professional Read understand and follow all instructions and use common sense when working on power equipment This includes the contents of the product s Oper ators Manual supplied with the equipment No liability can be accepted for any inaccuracies or omission in this publication although care has been taken to make it as complete and accurate as possible at the time of publication However due to the variety of outdoor power equipment and continuing product changes that occur over time updates will be made to these instructions from time to time Therefore it may be necessary to obtain the latest materials before servicing or repairing a product The company reserves the right to make changes at any time to this publication without prior notice and without incurring an obligation to make such changes to previously published versions Instructions photographs and illustrations used in this publication are for
4. on esa a E a ara tie 19 NOnsdt vera xlesS std t2 train Baan ed hate took O Bee as 19 AAA ELN 20 Side dischatoe GOOF in 8ny is ie tasks ee hoe Aah ars ode 20 Reat disCnateed0or ou ETA SENA DAA ia 21 Chapter 5 Transmission Removal ssssssseeecccccssssceceocossssececeoooossssesecceccosssssseceescsssssssee 23 To remove replace the transmission o o ooooooooooorro eee eens 23 Drive DOS MNOS rra ooo een 26 Chapter G2 Rlectric Sali 29 A A ede A A a a a a E 29 Battery Teste uste ida ee tn a Ota ee tye oe aioe o ee 30 Battery remova reyna Ginsu a aa Get Oe OO RAE a E ARA 31 US E E E der dl ira do dul E EE EEEE 32 L EE E E E E E A AE A EE EEE Orr re ae 7 Wine Names tra a a da R 33 SCHEMA Co aba aii pdas dt atra adenda tica rie loaded iii deidad a 34 II Introduction CHAPTER 1 INTRODUCTION Professional Service Manual Intent This manual is intended to provide service dealers with repair and overhaul procedures for the A and B series mowers Disclaimer The information contained in this manual is correct at the time of writing Both the product and the infor mation about the product are subject to change without notice About the text format Certain flags and key words are used to indicate the nature of the text that accompanies them They are as follows CAUTION Indicates a potentially hazardous situation that if not avoided may result in minor or moderate injury lt may also be used to alert against unsafe
5. on top of the battery See Figure 6 9 Key switch The key switch used on A and B series mowers is a normally open NO momentary switch This means that the contacts inside the switch are open until the key is turned NO Turning the key will close the contacts As soon as the key is released the contacts will open momentary switch To remove replace the key switch 1 Remove the key switch retaining nut See Figure 6 10 2 Pull the key switch out of the mounting bracket by the harness NOTE There is an internal star washer that should come out with the key switch 3 Unplug the wires going to the switch See Figure 6 11 4 Install the key switch by following the previous steps in reverse order 5 Test drive the mower before returning it to service 32 Key switch AA RA gt l Figure 6 9 Figure 6 10 Figure 6 11 ci E T LE Retaining nut aad Electric start Wiring harness To remove replace the harness Key switch 1 Disconnect the harness from the key switch NOTE The harness is a tight fit It may be necessary to remove the key switch to get enough leverage to unplug it 2 Cutoff the wire ties that hold the harness to the han dle bars Remove the battery box cover Disconnect positive and negative battery leads See Figure 6 13 Slide the charger port out of the battery box Lift the harness out of the battery box a e a Sea
6. practices WARNING Indicates a potentially hazardous situation that if not avoided could result in death of serious injury AN DANGER Indicates an imminently hazardous situation that if not avoided will result DANGER in death or serious injury This signal word is to be limited to the most extreme situa tions NOTE NOTE is used to point out helpful information that may not fit as a step in a procedure 1 Numbered steps indicate specific things that should be done and the order in which they should be done la Sub steps will be lettered and nested within steps Two or more sub steps may be combined to describe the actions required to complete a step e Bullet points Indicate sub steps or points of interest without implying order or relative importance Disclaimer This manual is intended for use by trained professional technicians e Common sense in operation and safety is assumed e Inno event shall MTD be liable for poor text interpretation or poor execution of the procedures described in the text e If the person using this manual is uncomfortable with any procedures they encounter they should seek the help of a qualified technician A and B series mowers Safety This Service Manual is meant to be used along with the Operator s Manual Read the Operator s Manual and familiarize yourself with the safety and operational instructions for the equipment being worked on Keep a copy of the Operator
7. the mower down on a couple of wooden blocks Squeeze the tabs together on the cable jacket using a pair of pliers or a ford fuel line disconnect tool and push it through the clutch lever See Figure 3 9 Work the barrel end of the cable out of the slot on the front sub frame Disconnect the engine control cable from the handle bar 8a Squeeze the tabs on cable jacket on the bail end of the cable together using a pair of pliers or a ford fuel line disconnect tool Push the cable through the bracket See Figure 3 11 Unhook the Z fitting from the safety bail Unsnap the cable mounting bracket from the handle bar Install the drive cable by following the previous steps in reverse order Test run the mower in a safe area before returning it to service 17 A and B series mowers 18 Wheels non drive axles and doors CHAPTER 4 WHEELS NON DRIVE AXLES AND DOORS Wheels Figure 4 1 Non drive axles Figure 4 2 All of the wheels drive and non drive are held on with a nylock lock nut To remove replace the wheel 1 Lift and safely support the mower 2 Remove the nut with a 1 2 wrench See Figure 4 1 3 Slide the wheel off of the axle 4 Install the wheel by following the previous steps in reverse order NOTE Apply a small amount of a dry lubricant to the axle shaft before sliding the wheel on NOTE Apply a small amount of releasable thread locking compound such as Loctite 242 blue
8. to the lock nut or replace it with a new one NOTE Tighten the wheel nuts to a torque of 80 100 in lbs 9 11 Nm 5 Test run the mower in a safe area before returning it to service All A and B series mowers have a solid rear axle Front axles on all A and B series mowers that are not self propelled are also solid The height adjuster handle is part of the axle and can not be serviced separately To remove replace the axle 1 Remove the wheels by following the procedure described in the previous section of this chapter 2 Gently spread apart the support arms See Figure 4 2 NOTE If a support arm breaks the entire sub frame must be replaced Pull the axle out of the sub frame 4 Install the axle by following the previous steps in reverse order 5 Test run the mower in a safe area before returning it to service 19 A and B series mowers Trail shield Never operate a mower without the trail shield It is a safety feature that is required by law Acaurion The trail shield is designed to drag on the ground behind the mower This helps keep the oper ator from getting their feet under the mowing deck To remove replace a trail shield z 1 Grab the trail shield in the middle Sub frame W 2 Pull back on the trial shield bending it until it clears N pan the sub frame a PA 3 Install it by bending it until the pins fit into the sub E frame cL 4 Let the trail shi
9. OTE If the control lever shows signs of damage or wear replace it 11 Install the cable by following the previous steps in reverse order 12 Test run the mower in a safe area before returning it to service 15 A and B series mowers Drive cable adjustment variable speed To adjust the drive cable 1 16 Start the engine NOTE If the mower starts to drive without touching the drive control lever the drive cable is too tight Squeeze the drive control lever NOTE If the drive speed is too slow the drive cable can be tightened NOTE If the drive speed is too fast the drive cable can be loosened To adjust the drive control turn the thumb wheel in the control handle See Figure 3 8 Adjust the cable so that e The wheels drive with sufficient force when the handle is squeezed e lttakes reasonable effort to squeeze the lever Thumb wheel e The wheels disengage completely when handle is released Figure 3 8 Drive Control Cable single speed To remove replace the traction control cable BB uceze tabs together e Figure 3 9 Figure 3 11 10 Drive cable 11 12 Cables Disconnect the spark plug wire and ground it to an engine bolt Drain the fuel from the gas tank into an approved con tainer Tip the mower up to gain access to the underside of the deck Remove the belt cover by following the steps described in Chapter 2 Blade and Belt Set
10. R 6 ELECTRIC START Some model of the A and B series mower have an electric start engine The starter and the pigtail connector are part of the engine See the engine manufacturer service information on those components The battery key switch and the harness going to the engine will be covered in this chapter Battery The battery used on the A and B series mower is a e Sealed maintenance free lead acid battery mn an e 12 volts Se Ge SATano on TAV TOA Only use the charger that was sup a VAcaurion plied with the mower to charge the SA Xf battery Use of an automotive battery Po charger may cause damage to the battery Over charging from automotive charger can cause acid to leak from the battery Figure 6 1 IMPORTANT Never use a fix load battery test on these batteries The current draw will cook the batteries and damage them See Figure 6 2 Figure 6 2 29 A and B series mowers Battery testing To load test a battery 1 2 30 Fully charge the battery 24 hour charge Move the mower to a safe area Take the cover off of the battery box See Figure 6 3 Disconnect the spark plug wire NOTE Do not remove the spark plug Attach a digital multi meter DMM to the battery posts See Figure 6 4 Set the DMM to the volts DC scale Attach an inductive amp meter amp clamp to the negative battery wire NOTE If you have a negative measurement the met
11. diseases Blades need to be examined for damage before sharpening Blades must be balanced after sharpening to reduce the vibrations felt from the deck Bent blades are a sign of a blade impact The blades must be replaced and the engine inspected for a bent crankshaft if a bent blade is found Blades come in a variety of styles side discharge mulching bagging combination there are even de thatching blades on the market The A and B Series mowers come equipped with a 3 in 1 blade from the factory The outer part of the leading edge cuts the grass A wing on the back edge lifts the grass for the next blade and propels clippings toward the bag or side discharge chute if the path to either is open A stepped up cutting edge just in board of the outer cutting edge mulches clippings as they fall if the side and or rear discharge chute s are closed and the mulch plug Is in place The air flow in the cutting deck is generated by the spinning blades If the blades are mounted upside down the air flow will be reversed pushing the grass down instead of standing up NOTE Blades that are mounted upside down increase the risk of impacting an object YAcaurion An incorrect or improperly mounted blade can crate a thrown object hazard Blade removal To remove the cutting blade Allow the engine to cool VAwarning Disconnect and ground the spark plug wire 490 850 0005 Drain the fuel into an approved container 1 Tip the m
12. eld snap into place z Test run the mower in a safe area before returning it to service Side discharge door To remove replace the side discharge mulching door Serious injury from flying debris VAcaurion is possible if the machine is operated with the side dis charge door open and the side discharge chute is not in place 1 Disconnect the spark plug wire 2 Open the side discharge door Remove the screw that secures the hinge to the mowing deck using a 3 8 wrench 4 Install by following the previous steps in reverse order NOTE The hinge is spring loaded Hold the hinge Figure 4 4 flat against the deck before starting the screw 5 Test run the mower in a safe area before returning it to service 20 Wheels non drive axles and doors Rear discharge door To remove replace the rear discharge door 1 Remove the rear bagger if installed 2 Grab the pivot rod with a pair of needle nose pliers Slide it to the right towards the height adjuster See Figure 4 5 NOTE There is a shear load putting tension on the pivot rod It will take some force to overcome this load 3 Once enough of the pivot rod stick out grab the end of it and pull it all the way out See Figure 4 6 4 Liftthe door off of the mower 5 Remove the torsion springs from each side of the door Figure 4 6 Hooks 6 Install the torsion springs in the new door NOTE The short hook on the end of the sprin
13. er was connected backwards Just ignore the minus sign Turn the ignition key to crank the engine for 10 sec onds NOTE While the engine is cranking read the volt age on the DMM and the current draw on the amp clamp NOTE DO not crank the engine for more than 30 seconds at a time If the battery voltage drops below 7 5 volts and the current draw is less than 110 of the starters rated current draw from the engine manufacturer the battery is bad NOTE If the current draw is more than 110 of the starters rated current draw there is either a short in the system or the starter is pulling too much current Figure 6 3 Amp clamp e 0 BE 0001 8000 Figure 6 4 hz 7 8888 0 0 de Figure 6 5 Electric start Battery removal To remove replace the battery 1 Take the cover off of the battery box See Figure 6 6 2 Disconnect positive and negative battery leads See Figure 6 7 Slide the charger port out of the battery box 4 Lift the harness out of the way Lift the battery out of the battery box 6 Install the battery by following the previous steps in reverse order a 7 Test run the mower by following the previous steps in reverse order if ji e Battery i Figure 6 8 31 A and B series mowers Fuse The A and B series mowers with electric start are equipped with a 40 amp ATO automotive blade type fuse The fuse is located in the battery box
14. g hooks into the door See Figure 4 7 Figure 4 7 21 A and B series mowers 10 11 12 22 Set the door on the rear sub frame Hook the end of the left torsion spring onto the rear sub frame Press the door down on the right side Hook the right torsion spring onto the sub frame Insert the pivot rod NOTE When fully inserted the end of the pivot rod will be recessed into the hole Test run the mower in a safe area before returning it to service hi RTS a Figure 4 8 3 ESA ig a E 5 Pivot fody i Figure 4 9 i 4 On A wi y d L gt A Rear Sub eT x Transmission CHAPTER 5 TRANSMISSION REMOVAL To remove replace the transmission 1 Remove the blade and belt by following the proce dures described in Chapter 2 Blade and Belt 2 Disconnect the drive control cable from the transmis sion by following the steps described in Chapter 3 Cables 3 Remove the drive spur gear 3a Secure the transmission s output shaft by clamping a pair of vise grips to it See Figure 5 1 NOTE DO NOT engage the drive control bail lever to keep the transmission output shaft from rotating while installing removing the screws that secure the spur gears This practice damages the internal components of the transmission Figure 5 1 3b Remove the screw that fastens the spur gear to the end of the trans
15. ine tool Figure 3 3 13 A and B series mowers Slide the inner cable through the slot See Figure 3 4 Unhook the Z fitting from the blade brake and dis PS card the old cable Z fitting Install by following the previous steps in reverse order Test run the mower before returning it to service Drive Control Cable variable speed To remove replace the traction control cable 14 M FIBuceze tabs together o s ch lever Disconnect the spark plug wire and ground it to an s engine bolt C Drain the fuel from the gas tank into an approved container Remove the belt cover by following the steps described in Chapter 2 Blade and Belt Set the mower down on a couple of wooden blocks Remove the transmission cover Squeeze the tabs together on the cable jacket using a pair of pliers or a ford fuel line disconnect tool and push it through the clutch lever See Figure 3 5 gt m Figure 3 5 A A E s Front sub frame y re _ Figure 3 6 Control lever Figure 3 7 Cables 7 Work the barrel end of the cable out of the slot on the front sub frame 8 Remove the four screws that fasten the lower handle cover to the upper handle cover 9 Disconnect the barrel end of the cable Align the cable with the slot on the control lever and slide it out See Figure 3 7 10 Slide cable out of the cable ties on the handle bar and discard N
16. ion may also be available to our company authorized service center per sonnel through our company corporate offices regional parts distributors and regional service center field support personnel Please contact the designated support office in your area or our corporate offices directly should further service information be needed MTD Products LLC P O Box 368022 Cleveland OH 44136 Telephone 800 800 7310 www mtdproducts com A and B series mowers Maintenance chart amenacen Each Each ive an E oe oe esma AI OS FE emm AI A E O O Check amp gap spark plug Replace if worn Check cooling fins After prolonged storage Note on oi Note on oi oil Change oil after first 5 hrs of use and before prolonged storage Note on air filter Air filter and pre filter life vary dramatically with operating conditions Drain or preserve fuel Before prolonged storage Fog or lube cylinder Before prolonged storage Rotate engine to TDC Before prolonged storage NOTE Refer to the engine manufacturer s manual for complete engine service information MTD engines are covered by form 769 03354A Blade and Belt CHAPTER 2 BLADE AND BELT Blades The condition of the blades will greatly effect the quality of the cut The blades should be sharpened and balanced after every hour of cutting depending on local conditions A dull blade tears the grass instead of cutting it Torn grass blades leaves a rough look and makes the grass vulnerable to
17. le When the shorter end of the shaft clears the second shaft sup port remove the transmission from the axle See Figure 5 6 8 Install the transmission by following the previous steps in reverse order NOTE Apply a small amount of releasable thread locking compound such as Loctite 242 blue to the wheel nut or replace it with a new one NOTE Tighten the wheel nuts to a torque of 80 100 in lbs Axle assembly 9 11 Nm iai Figure 5 6 9 Test run the mower before returning it to service 25 A and B series mowers Drive bushings To remove replace the drive bushings 26 Disconnect and ground the spark plug wire Drain the fuel into an approved container Tip the mower with the muffler side down or tilt the mower back on a work bench with the front wheels up Remove the belt cover by following the steps described in Chapter 2 Blade and Belt Set the mower down on a couple of wooden blocks Remove the drive spur gear 6a Secure the transmission s output shaft by clamping a pair of vise grips to it See Figure 5 7 NOTE DO NOT engage the drive control bail lever Figure 5 7 to keep the transmission output shaft from rotating while installing removing the screws that secure the spur gears This will damage the transmission internally Remove the screw that holds the spur gear to the end of the transmission output shaft using a T 30 torx driver See Figure 5 8 NOTE DO NOT u
18. mission output shaft using a I 30 torx driver See Figure 5 2 Dust shield o NOTE DO NOT use an impact driver to remove install 6 Stamped L spur gear retaining screws The excessive torque Spur gear AT rar Tor lett can over come the vise grips and damage the j f i transmission s internal components Screw 3c Remove the spur gear NOTE The left and right sour gears are a mirror image of each other They are stamped L and R to iden tify a left and a right spur gear If the gears are reversed the wheels will not drive forward and they will lock up when pulled in reverse Figure 5 2 23 A and B series mowers 3d Remove the dowel pin that drives the spur gear See Figure 5 3 NOTE There is a lip on one end of the dowel pin The pin must be removed from that end 4 Remove the dust shield 5 Remove the transmission stop using a 5 16 wrench See Figure 5 4 6 There are two retaining clips that hold the transmis sion to the front sub frame Squeeze these clips below the transmission output shaft while lifting the transmission out of the machine See Figure 5 5 NOTE The front axle assembly will come off with the transmission 24 r i P ii Dowel pin Dust shield _ v 2 EA A m Squeeze _ Figure 5 5 Retaining clip aang Transmission 7 Slide the longer end of the transmission output shaft through the shaft support of the ax
19. ower with the muffler side down or tilt the mower back on a work bench with the front wheels up See Figure 2 1 2 Block the blade from rotating using a block of wood or a blade holder tool NOTE MTD blade holding tool part number 490 850 Figure 2 1 0005 can be used block the blade See Figure 2 1 A and B series mowers 3 Remove the blade bolt and diamond shaped Belleville blade spring using a 5 8 wrench Use care around the blade VAcaurion while removing or tightening the bolt The blade can spin and cause injury 4 Lift away the blade See Figure 2 2 5 Inspect the blade If it is bent or worn beyond proper qi sharpening replace it with a new blade xa 6 Sharpen and balance the blade if it is not badly o Belleville spring worn b 7 Check the blade adapter crankshaft and hardware ae Bolt for damage A Figure 2 2 8 Install the blade with the blade adapter and Belleville spring washer properly positioned Tighten the blade bolt to a torque of 38 50 ft Ib 51 68 Nm NOTE OEM blades manufactured by MTD are stamped with the part number and the word BOTTOM The word bottom should face the ground when the mower is in its normal operating position See Figure 2 3 Bottom stamped in blade te i dh a Ae BOTTOM Figure 2 3 Blade and Belt To properly sharpen the cutting blades remove equal amounts of metal from both ends of the blades along the cutting edge
20. reference use only and may not depict actual model and component parts Copyright 2010 MTD Products Inc All Rights Reserved MTD Products Inc Product Training and Education Department FORM NUMBER 769 05615A 03 2010 Chapter Le Introduction sscsiocsccseesteseeccssescceveseneecancenecuveasanseaeeueeveacaenvbsoveccdscssaceneduvanecsweceneeades 1 About ho text Tomatito drenar l A A EEEE cin AE EAN EESE ci AE EERE 2 Eo aee das us a tal 3 Assembly IMSTEUCUONS air id ar ia ds hw Sa ee 3 TMG O AMA II wd ert Sn 4 The B Seles MOW Cl 23nd suis 4 a cece ane Besa as hs Bee wD ee ana 4 Understanding model and serial numbers 0 0 0 0c ccc eens 5 Maintenance Chari adas apo E paid Seeds Paces 6 Chapter 2 Blade and Bell analisis 7 Bldes arrasada dada ss 7 BAGS Temoxal e sae cx dobra e ants E Scare tad ge cesta tard dep erent teria d oe 7 Blade sharpenin 72452454 lira da deeds date cd be ates 9 BeltremOval replaCement iu westwards Seas ees See ee E Nes bias 10 Chapter 3 Cables aura trino EE EE RESE AE 13 Ensme Control Cable occasion aa da 13 Drive Control Cable variable Speed o oooooooocooorrrooonoao om 14 Drive cable adjustment variable Speed ooo oooooooorooororo nooo 16 Drive Control Cable single Speed o oooooooooroocoooao eens 17 Chapter 4 Wheels Non drive Axles and Doors ccccccccssssssssssccccccsssssssssscescccssssssess 19 Ve CMG aes ar area A EEE ENEL TEA este ot tk aad
21. rs Figure 1 1 e 7 front wheels and 8 rear wheels The B series mower The B series mower is a high wheel version of the A series mower It has 11 rear wheels and is made in the same variety of configurations as the A series See Figure 1 2 Figure 1 2 These mowers are built in a variety of brands Identify the mower by the 11 digit model number and the serial number when ordering parts NOTE Use only the correct OEM parts when making repairs to the mower or its engine Introduction Understanding model and serial numbers A sample model number of an A series mower is 12A A26M011 The break down of what the model number means is as follows Wee ae ea NOS indicates that this is a self propelled mower RAMS nate A indicates the sales revision Oo read ES Atos Sa indicates the starter and wheel drive O ee Pes eset t indicates the series ri E ase ae indicates the type of discharge 0 mulch side discharge 1 mulch rear dis charge 2 3 in 1 mower E rs 6M indicates the engine 1 Esad 011 indicates the retailer The serial number is 1J059P10005 The serial number reads as follows A ETALE canteens engineering level Bat act heme E month of production J October A day of the month EO unre oa last digit of the year AS inte bade et plant it was built in a E AM catsuit ie assembly line number ere 0005 number of unit built Additional technical and service informat
22. s parallel to the trailing edge at a 29 to 32 angle IMPORTANT If the cutting edge of the blade has already been sharpened to within 1 5 8 from the back edge at the smallest point or if any metal separation is present replace the blades with new ones See Figure 2 4 Blade sharpening It is important that each cutting blade edge be ground gt Worn blade edge Blade seperation equally to maintain proper blade balance The blade can be tested by using a blade balancer Wind wing Grind metal from the heavy side until it balances 4 evenly A poorly balanced blade will cause excessive vibration and Sharpen edge evenly Figure 2 4 caution may cause damage to the mower and result in personal injury NOTE MTD blade balancer AR SBB 102 or the blade bal ancing kit AR BSK 1 can be used to balance the blade See Figure 2 5 A Q AR BSK 1 A and B series mowers Belt removal replacement The single speed and the variable speed mowers use the same transmission When the drive control bail is oper ated it pulls on the drive cable As the drive cable starts to pull the clutch lever on the transmission it engages the clutch As the cable continues to pull it tilts the transmission to put tension on the drive belt On the single speed ver sion it is one solid pull that fully engages the drive belt On the variable speed version the amount of tension is con trolled by how much the cable is pulled
23. s Manual for quick reference Operator s manuals may be viewed for free at the brand support website It will be necessary to have the complete model and serial number for the equipment Be prepared in case of emergency Keep a fire extinguisher nearby Keep a first aid kit nearby Keep emergency contact numbers handy Replace any missing or damaged safety labels on shop equipment Replace any missing or damaged safety labels on equipment being serviced Grooming and attire Do not wear loose fitting clothing that may become entangled in equipment Long hair should be secured to prevent entanglement in equipment Jewelry is best removed Protective gear includes but is not limited to Clear eye protection while working around any machinery Protective gloves where necessary Armored footwear when working around any machinery Hearing protection in noisy environments Chemically resistant gloves when working with chemicals or solvents Respirator when working with chemical or solvents Appropriate tinted eye protection when cutting or welding Remember that some hazards have a cumulative effect A single exposure may cause little or no harm but continual or repeated exposure may cause very seri ous harm Clean spills and fix obviously dangerous conditions as soon as they are noticed Lift and support heavy objects safely and securely Be aware of your surroundings and potential hazards that are inherent to all power equipment All
24. se an impact driver to remove install spur gear retaining screws The excessive torque can over come the vise grips and damage the transmission s internal components Remove the spur gear NOTE The left and right spur gears are a mirror image of each other They are stamped L and R to identify a left and a right spur gear If the gears are reversed the wheels will not drive forward and they will lock up when pulled in reverse Dust shield a a e A MN Stamped L a Tor left Spur gear Figure 5 8 Transmission Dowel pin 8a Remove the dowel pin that drives the spur gear See Figure 5 9 NOTE There is a lip on one end of the dowel pin The pin must be removed from that end 8b Remove the dust shield Dust shield ie 4 04259 EPOM 33M SA 14950 Epa TM J i 9 Pry out the drive bushings See Figure 5 10 7 10 Install new bushings by following the previous steps in reverse order NOTE Apply a small amount of a dry lubricant to the axle mA shaft before installing the spur gear DA TE NOTE Apply a small amount of releasable thread locking compound such as Loctite 242 blue to the wheel nut or replace it with a new one e A de NOTE Tighten the wheel nuts to a torque of 80 100 in Ibs y gt 9 11 Nm nta 11 i Test run the mower before returning it to service Figure 5 10 27 A and B series mowers 28 Electric start CHAPTE
25. that the manual is handy as a quick refer ence guide as well as a step by step procedure guide that does not require the user to hunt for informa tion Lubricant quantity and specification may be noted in the part of the text that covers maintenance and again in the section that covers assembly They may also be summarized in tables along with special instructions Whichever method is more appropriate will be used In many cases the information will be found in several places in the manual so that the manual is handy as a quick reference guide as well as a step by step procedure guide that does not require the user to hunt for information The level of assembly instructions provided will be determined by the complexity of reassembly and by the potential for damage or unsafe conditions to arise from mistakes made in assembly Some instructions may refer to other parts of the manual for subsidiary procedures This avoids repeating the same procedure two or three times in the manual A and B series mowers The A series mower The A series mower is a 21 platform introduced for the 2010 season The A series is produced in a variety of configurations e A push version e A front wheel drive single speed version e A front wheel drive variable speed version e Aside discharge and mulch version e A rear discharge and mulch version e A rear discharge side discharge and mulch version e Dual point height adjuste
26. the labels in the world cannot protect a technician from an instant of carelessness Exhaust fumes from running engines contain carbon monoxide CO Carbon monox AN DANGER ide is a colorless odorless gas that is fatal if inhaled in sufficient quantity Only run engines in well ventilated areas If running engines indoors use an exhaust evacuation system with adequate make up air ventilated into the shop Fasteners Introduction The fasteners used on the equipment described in this manual and the engine that powers it are a combi nation of metric and fractional inch For this reason wrench sizes are frequently identified in the text and measurements are given in U S and metric scales If a fastener has a locking feature that has worn replace the fastener or apply a small amount of releas able thread locking compound such as Loctite 242 blue Some fasteners like cotter pins are single use items that are not to be reused Other fasteners such as lock washers retaining rings and internal cotter pins hairpin clips may be reused if they do not show signs of wear or damage This manual leaves that decision to the judgement of the technician Assembly instructions Torque specifications may be noted in the part of the text that covers assembly They may be summa rized in tables along with special instructions regarding locking or lubrication Whichever method is more appropriate will be used In many cases both will be used so
27. ve the belt 15 Install a new belt by following the previous steps in reverse order 16 Test run the mower in a safe area before returning it i to service i i pa guide 12 Cables CHAPTER 3 CABLES Engine Control Cable The engine control cable operates the engine brake When the bail is pulled against the handle bar the engine control cable pulls the engine brake pad away from the flywheel releasing the brake The engine brake has an igni tion switch built into it When the brake is engaged the ignition switch shorts the ignition module to ground This turns off the ignition stopping the engine To remove replace the engine control cable 1 Make sure the engine is off and cool enough to safely work around 2 Squeeze the tabs on cable jacket on the bail end of the cable together using a pair of pliers or a ford fuel line disconnect tool Push the cable through the bracket See Figure 3 1 3 Unhook the Z fitting from the safety bail NOTE On the single speed models the cable bracket is part of the drive control cable Figure 3 1 4 Use a pair of pliers or a ford fuel line disconnect tool to squeeze the tabs Push the cable jacket through the bracket until the inner cable lines up with the slot on the bracket See Figure 3 2 NOTE Ford fuel line tools cause less damage to the barbed fittings See Figure 3 3 Cae TORN l gt cis 4 a gt gt A a he ii Figure 3 2 Ford fuel l
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