Walker MC (18 HP) Owner'S Manual Download Page 1

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OWNER’S MANUAL

Safety, Assembly, Operating, and Maintenance Instructions

Model MC (18 HP)

(Covers Serial Numbers 03-61061 and on)

Please Read and Save These Instructions

Effective Date: 04-15-03

For Safety, Read All Safety and Operation

P/N 6000-8

Instructions Prior to Operating Machine

Price $5.00

™

Summary of Contents for MC (18 HP)

Page 1: ... Maintenance Instructions Model MC 18 HP Covers Serial Numbers 03 61061 and on Please Read and Save These Instructions Effective Date 04 15 03 For Safety Read All Safety and Operation P N 6000 8 Instructions Prior to Operating Machine Price 5 00 ...

Page 2: ...portant to your safety and must be read and understood to help prevent possible injury to the operator or others If anything in this manual is confusing or hard to understand please call our service department at 970 221 5614 for clarification before operating or servicing this mower This manual covers Model MC with the Kohler Command CH18 18 0 HP gasoline engine All shields and guards must be in ...

Page 3: ...rge Chute Installation ______ 18 Deck Discharge Shield Installation ______ 18 PTO Shaft Guard Installation __________ 18 Tilt Up Roller Wheel Installation ________ 18 Mower Deck lnstallation on Tractor ______ 19 Deck Installation ____________________ 19 Deck Leveling ______________________ 21 PREOPERATING CHECKLIST ____________ 22 Operating Instructions_____________ 24 CONTROL IDENTIFICATION LOCAT...

Page 4: ...rive Belts __________________________ 57 Mower Deck Gearbox Oil Seals _________ 58 Spark Plugs _________________________ 58 Fuel Lines and Clamps ________________ 58 Engine Starter________________________ 58 Engine Valve Clearance________________ 58 Blade Brake Action ___________________ 58 REPLACING REPAIRING ________________ 59 Drive Belts __________________________ 59 Engine PTO Drive Belt ____...

Page 5: ...main wheels HYDROSTATIC TRANSMISSION transmits and controls power from the ground drive belt to the main drive wheel LEFT HAND LH refers to the left hand side of the tractor when the operator is seated facing forward in the tractor seat POWER TAKE OFF PTO transmits engine power to run the cutter blades and GHS blower POWERFIL spreads the mowed material throughout the interior of the grass catcher ...

Page 6: ...vice of these components during the limited war ranty period it is important to find a local authorized servicing agent of the component manufacturer Any unauthorized work done on these components dur ing the warranty period may void the warranty If you have any difficulty finding an authorized outlet or obtaining warranty service please contact our Ser vice Department for assistance Walker Manufa...

Page 7: ...TRICAL SYSTEM Battery 12 Volt 35 AH 295 CCA Charging System Flywheel Alternator Charging Output 15 Amp DC Regulated System Polarity Negative Ground Ignition Electronic Capacitive Discharge Starter 12 Volt Electric Ring Gear Type Solenoid Shift Interlock Switch Ignition Lockout by Seat Switch Transmission Neutral and Blade Clutch Circuit Breaker Auto Reset 30A TRANSMISSION Manufacturer Model Dual H...

Page 8: ...rive Peerless Model 1000 Gearboxes Blade Drive Clutch and Brake Manual Belt Tightener Clutch and Band Brake Stops Blades within Five 5 Seconds of Disengagement Max Blade Speed 22 in 56 cm Blade 3600 RPM Engine 2900 RPM 16700 FPM 5090 m min TIRE SIZE Deck Caster Wheel 2 80 2 50 4 Pneumatic 4 Ply Deck Caster Wheel Optional 8 25 x 2 75 Semi Pneumatic Drive 18 x 8 50 8 4 Ply Drive Optional Narrow Tire...

Page 9: ... cm Two 2 Counter Rotating Blades with a 4 in 10 cm Center Overlap 42 in 107 cm SD Model 22 in 56 cm Two 2 Clockwise Rotating Blades with a 2 in 5 cm Center Overlap 42 in 107 cm GHS Model 22 in 56 cm Two 2 Counter Rotating Blades with a 2 in 5 cm Center Overlap Deck Suspension Torsion Flex Frame with Caster Wheels and Counterweight Springs CURB WEIGHT Approximate SD Tractor Only 645 lb 293 kg GHS ...

Page 10: ... on Grass Delivery Spout Triggers Horn Signal Powerfil Oscillating Delivery Spout Driven by 12 Volt Electric Gearmotor Spreads Material throughout Interior of Catcher 25 Cycles Minute SEAT Contour Molded with Nylon Backed Vinyl Cover and Integral Foam Cushion FRAME BODY CONSTRUCTION Frame All Welded Unitized Steel Chassis Body 14 Gauge Steel Deck 11 Gauge Steel GHS Catcher and Chutes Molded Cross ...

Page 11: ...atcher Anti Scuff Roller Catcher Lift Dump Handle Transmission Control Rod Adjustment Nut RH Deck Lift Handle Cutting Height Adjustment Tilt Up Hook Not Visible Deck Caster Wheels Counterweight Spring and Protective Cover Spring Clip Tilt Up Latch Footrests Tilt Up Deck Handle Deck Support Pins and Height Adjustment Hitch Pins Transmission Control Rod Adjustment Nut LH Fuel Tank and Cap Deck Suppo...

Page 12: ...nd Drive Wheel Catcher Lift Dump Handle Catcher Door Gas Spring Removable Grass Catcher Screen Not Visible Catcher Door Catcher Door Handle Anti Scuff Roller Tailwheel Fork and Wheel Catcher Exhaust Deflector Catcher Door Gas Spring Protective Cover Rear View and Left Side View ...

Page 13: ...ipstick Precleaner Tube Fuel Pump Donaldson Air Cleaner Air Cleaner Cover Rubber Bumper Body Support Air Restriction Indicator Not Visible Rubber Bumper Body Support Air Intake Hose Fuel Tank Cap Jackshaft PTO Clutch Lever Turbine Precleaner Positive Battery Cable Muffler Oil Fill Dipstick Throttle and Choke Linkage Neutral Safety Switch LH Transmission Lockout Lever Battery Top View Engine Compar...

Page 14: ...act your authorized Walker Mower Dealer or call Walker Manufacturing Company at 970 221 5614 BEFORE OPERATING 1 Read and understand the contents of this Owner s Manual before starting and operat ing the machine Become thoroughly familiar with all machine controls and how to stop the machine and disengage the controls quickly Replacement Owner s Manuals are available by sending the Model and Serial...

Page 15: ...pilled fuel before starting the engine 11 Never attempt to make any adjustments while the engine is running except where specifically instructed to do so 12 The electrical system battery contains sulfuric acid Avoid any contact with skin eyes and clothing Keep the battery and acid out of reach of children OPERATING 1 Operate the mower only in daylight or in good artificial light with good visibili...

Page 16: ...th the grass catcher in the DUMP position or with the back door OPEN Dan gerous projectiles may be thrown out of the dis charge chute or the back of the grass catcher 17 For GHS equipped models use care when closing the grass catcher door Keep fingers and hands away from the hinge and pinch points when the door is being closed Also keep fingers and hands clear of the door frame The door is held cl...

Page 17: ...may cause hazardous conditions 8 Never attempt to disconnect any safety devices or defeat the purpose of these safety devices 9 Do not change the engine governor settings or overspeed the engine The governor has been factory set for maximum safe engine operating speed 10 Use genuine factory replacement parts Substitute parts may result in product malfunc tion and possible injury to the operator an...

Page 18: ...d 5855 SAFETY CONTROL AND INSTRUCTION DECALS Safety Control and Instruction Decals are installed on the machine if any are missing illegible or damaged a replacement should be ordered and installed before putting the machine into operation The Decal Part Number is listed below and in the Parts Manual Each End of Mower Deck 5808 Catcher Safety Latch RH Side 5874 Underside of Body 5861 Gear Axle 581...

Page 19: ...n Decals are installed on the machine if any are missing illegible or damaged a replacement should be ordered and installed before putting the machine into operation The Decal Part Number is listed below and in the Parts Manual Deck Carrier Frame 8647 Deck Carrier Frame 5865 Right Side Below Operator Seat 7809 Top of Blower Housing 5819 Fender LH Side 5802 2 Jackshaft Support Adjacent to Dipstick ...

Page 20: ...ing parts and safety systems Wet Battery Service If the battery has been shipped wet but the electro lyte level is low or the battery needs to be charged then 1 Fill each battery cell with drinking water to the bottom of the vent wells 2 Charge battery Refer to Battery Charging in this section Dry Battery Service To fill activate battery with electrolyte if battery has been shipped dry 1 Remove th...

Page 21: ...it covers the post completely to pre vent an electrical short Battery Installation Mower Deck Assembly Deck Caster Wheels Installation 1 Remove the bolt nut axle spacer tube and spacer washers from each deck caster wheel fork NOTE Spacer washers are used only when the optional semi pneumatic deck wheels 8 25 x 2 75 are installed 2 Fit the axle spacer tube through the wheel hub position the spacer ...

Page 22: ... Attach the deck side discharge shield by positioning the shield hinge lug in front of the deck mount and fastening with two 3 8 16 x 1 1 4 in bolts 3 8 16 ESNA nuts and 3 8 in wave spring washers The wave washers fit between the two hinging surfaces Tighten the nuts until the shield moves freely but is not loose Discharge Shield Installation on Side Discharge Deck PTO Shaft Guard Installation Pos...

Page 23: ...guiding the deck chute into the blower 4 Install the hitch pin through the hole on the end of each support arm to lock the deck in place refer to Deck Counterweight Spring Installa tion photo Two 2 hitch pins are included in the owner s packet of materials 5 Connect the mower deck PTO drive shaft assembly to the tractor with the splined quick disconnect coupler This coupler simplifies shaft alignm...

Page 24: ... 25 Ib 6 8 to 11 3 kg Check this weight by lifting on the front of the deck carrier frame If required the spring tension can be adjusted by tightening or loosening the elastic stop nuts located underneath the lower spring hook Refer to Deck Counterweight Spring Installa tion photo Deck Counterweight Spring Installation Arrows on Shaft and Tube used to align when sliding together PTO Connection Gre...

Page 25: ...k 3 Check the front to rear level Rotate the blades to point forward Measure the distance from blade tip to ground on the front and rear The rear of the blade should be 1 8 to 1 4 in 3 to 6 mm higher than the front of the blade shim the rear or front deck support pins equally to achieve at least 1 8 in 3 mm difference NOTE The mower deck and support frame are jig welded within normal tolerances ve...

Page 26: ...ce Instructions CHECK AND SERVICE ENGINE AIR CLEAN ER SYSTEM Check air restriction gauge to make sure there is no red indication showing Check condition cleanliness and security of the complete air cleaner system clean air filter every 100 hours For detailed procedures refer to CLEANING the Engine Air Cleaner System in Maintenance Instructions ADJUST CARBURETOR Initial Start up Only Refer to ADJUS...

Page 27: ... deck lock levers on each side of the carrier frame and inserting the deck hook into the tilt up latch on the tractor body Before operating the tractor make sure to re engage the deck lock levers after lowering the deck to the normal operating po sition Deck Secured in TILT UP Position CHECK MOWER BLADE CONDITION SHARP NESS AND SECURITY OF MOUNTING The blade mounting nut should be tightened to 60 ...

Page 28: ...tion for at least 60 seconds before making a restart attempt Prolonged cranking can damage the starter motor and shorten battery life Release the key when the engine starts and it will return to the RUN position To stop the engine rotate the key counterclockwise to the O position CAUTION Before operating the mower become fa miliar with the location and function of all operator controls Knowing the...

Page 29: ...t necessary to hold the FSC in posi tion since the friction lock maintains the selected le ver position Pulling back on the steering levers overrides the FSC setting and slows or stops for ward travel Releasing the steering levers allows the tractor to resume forward travel at the speed set by the FSC lever To stop and park the machine the FSC lever is moved backward to the NEUTRAL PARK position S...

Page 30: ...SION LOCKOUT in this section for operating instructions Lockout Lever Location NOTE The transmission plunger on the side of the transmission case activated by the LOCKOUT LE VER must be completely released during operation of the mower otherwise operation of the transmis sion will be erratic Hourmeter The hourmeter which is located on the left front of the body displays operating time accumulated ...

Page 31: ...ING LEVER The Forward Speed Control also Establishes the Neutral Park Position of the Steering Levers FORWARD SPEED CONTROL LEVER FSC Full Forward Ground Speed Position Intermediate Ground Speed Position Neutral Park Position Disengaged Position Idle Position ON Position OFF Position CHOKE Engaged Position Fast Throttle Position Engaged Position Disengaged Position Operating Controls Top View from...

Page 32: ...FF position keeping enough choke on to allow the engine to run smoothly as it warms up As soon as possible move the choke to the OFF position IMPORTANT Make sure the choke is in the OFF position during normal engine operation running with the choke in the ON position CAN damage the engine ADJUSTING GROUND SPEED AND STEERING IMPORTANT If the DSD52 Mower deck is in stalled on the tractor make sure t...

Page 33: ...arking brake Beginning Recommendations are Learn operation of the mower in an open area away from buildings fences and ob structions Learn operation on flat ground BEFORE operating on slopes Start maneuvering the mower with SLOW engine speed and SLOW Forward Speed Control setting until familiar with all operat ing characteristics Remember it is not necessary to hold the steering levers forward a u...

Page 34: ...rastically short en drive belt life Use only moderate engine speed when engaging the blade clutch 2 Pull the blade clutch lever SLOWLY up to en gage the mower blades IMPORTANT DO NOT engage the blade clutch when transporting the mower across drives side walks loose materials etc DO NOT engage the blade clutch with the PTO shaft disconnected the mower deck removed from tractor Pull Steering Levers ...

Page 35: ...ry to ENGAGE the parking BRAKE to prevent the mower from creeping This is due to a small amount of slip page in the hydrostatic transmissions especially when transmission fluid is warm ADJUSTING CUTTING HEIGHT Engaged Position Disengaged Position WARNING A brake stops the cutter blades and blower on GHS equipped models from freewheeling within five 5 seconds after disengaging the clutch If the bra...

Page 36: ...the hydrostatic transmissions are unlocked released 1 Raise the body 2 Lift the transmission lockout lever on both the RH and LH transmissions and secure into place with the locking cam 3 The mower will freewheel with the levers in the LOCKOUT position The levers must be in the highest position to completely unlock the trans missions Lockout Lever Freewheel Position 4 After moving the mower releas...

Page 37: ...Assembly Instructions Use an alternating stripe mowing pattern for best appearance and vary the direction of the stripe each time the grass is mowed to avoid wear patterns in the grass Avoid damage to the grass by slipping and skid ding of the drive tires Use smooth control move ments of the steering levers since the hydrostatic transmissions are power boosted controls and jerk ing the levers can ...

Page 38: ...body should never be tilted for ward with the deck in the tilt up position This can cause the deck to unhook from the tractor and fall with considerable force potentially causing deck or tractor damage and or bodily injury When transporting a tractor with the deck in the tilt up position on a truck or trailer the deck should be secured to the vehicle with a strap or rope stop vertical movement Thi...

Page 39: ...r Discharge Mower Deck Deck Discharge Chute Blower Body Chute Assembly Grass Catcher Catcher Door Spring Catcher Door Exhaust Deflector Exhaust Screen Removable Catcher Door Safety Latch Grass Pak Vane Switch Full Signal Horn Actuator Rod Powerfil Drive Motor Dump Handle Powerfil Delivery Spout Delivery Chute Shear Pin Shear Bolt ...

Page 40: ...ctions NOTE In Autumn when using the GHS mower to vacuum leaves it is recommended to raise the front of the mower deck 2 to 3 notches 1 to 1 1 2 in 25 to 38 mm higher than the rear This will avoid bulldozing leaves particularly when the leaves are piled in a thick layer To make this ad justment the hitch pins in the two 2 front deck support pins are repositioned 2 to 3 notches higher while leaving...

Page 41: ... point is finally reached where the flow of air and grass clippings is restricted NOTE One condition that quickly causes a buildup of material in the deck housing is mowing grass and or weeds which are juicy The material collects under the deck with sticky green juice Clo ver and weeds are especially a problem The mower deck will need to be cleaned frequently when operating in these conditions Che...

Page 42: ...by hand as it oscillates The horn should sound as the switch is moved in both directions The full signal horn is designed to operate sound when the grass catcher is almost full The timing of the signal is adjustable by changing the position of the vane on the Grass Pak switch If the signal is coming on too soon catcher not completely full or too late grass clogging in catcher spout and deliv ery c...

Page 43: ... to the normal operating position DO NOT allow the catcher to drop down 4 Close the door by holding the door handle with the left hand and releasing the safety latch on the door hinge mechanism with the right hand The safety latch is released by pressing in on the top of the latch Then smoothly close the door working against the spring pressure that holds the door closed DO NOT let the door slam s...

Page 44: ...the bag and dumping Dumping Catcher into Dump Bag 5 Lower the catcher smoothly down to the normal operating position DO NOT allow the catcher to drop down 6 Close the door by holding the door handle with the left hand and releasing the safety latch on the door hinge mechanism with the right hand The safety latch is released by pressing in on the top of the latch Then smoothly close the door workin...

Page 45: ...ake Action x 71 Check Oil Level in Gear Axle x 46 Clean Hydrostatic Transmission Cooling Fins x 55 Clean Engine Cooling Fins x 52 Check Regap Spark Plugs x 58 Change Engine Oil Filter x 43 Check Fuel Lines and Clamps x 58 Replace Air Filter Element and Vacuator Valve x 51 Replace Fuel Filter x 65 Service Battery x 55 Check Adjust FSC Friction Lock x 76 Service Solenoid Shift Starter x 58 Check Eng...

Page 46: ...ters often skimp on the filtration media and require more frequent cleaning and replace ment see following instructions Use the air flow restriction gauge to indicate the need to service the air filter Do frequently check the Turbine Precleaner for free movement of the internal fan DO NOT overservice or frequently disturb the air filter A dirty air filter actually cleans better than a new one Chan...

Page 47: ...ipstick clean the area around the dipstick to keep any dirt or debris out of the engine 3 Remove the dipstick wipe off with a clean rag then reinsert the dipstick into the tube and press all the way down 4 Remove the dipstick again and check the oil lev el on the dipstick The oil level should be within the Operating Range on the dipstick between the L mark and the F mark IMPORTANT DO NOT operate e...

Page 48: ...ine owner s manual Use the recommended oil viscosity for the expected ambient temperature Oil with the correct vis cosity will aid starting in cold weather and assure proper lubrication in hot weather Fill up to but not above the F mark on the dipstick Crankcase capacity is 1 85 quarts 1 75 liters plus 1 2 pint 24 liters for the new oil filter IMPORTANT Check the dipstick reading be fore adding th...

Page 49: ...tubes it is necessary to add oil slowly Allow a few minutes after adding oil for the oil to flow throughout the assembly and the oil level to stabilize before reassembly IMPORTANT DO NOT overfill the deck gear boxes The gearbox assembly is not vented and overfilling with oil will cause excessive pres sure and result in oil leaks 5 Check condition of the cover gasket and replace if worn or damaged ...

Page 50: ...ure 90W gear lube 3 Check that the oil level is at the FULL mark on the dipstick DO NOT overfill Gear Axle Lubrication The gear axle oil lubrication is SAE 80W 90 API GL 5 gear lube Check the axle oil level after every 100 hours of operation by removing the oil level plug If additional oil is needed remove the breather vent on top of ax le and fill until oil is at the level plug Change axle oil ev...

Page 51: ...een so it is essential that there is fluid at the bleed plug before the transmission is considered full IMPORTANT Any attempt to remove or in any way alter the filtering screen in the transmission reservoir could cause damage to the transmission and will VOID any transmission warranty Changing Hydrostatic Transmission Fluid The hydrostatic fluid should be changed every 1000 hours or two 2 years Al...

Page 52: ...ush Rod Grease 2 24 PTO Clutch Lever Pivot Grease 1 25 Belt Tightener Pivot Grease 1 PTO Clutch 26 Brake Actuator Rod and Brake Oil 3 Band Pivot Pins Clevis 27 Brake Actuator Pivot Grease 1 28 Anti Scuff Roller Wheel Oil 2 29 Catcher Hinge Point Oil 2 30 Choke Control Cable Ends Oil 2 31 Throttle Control Cable Ends Oil 2 32 Engine Oil Oil 1 33 Belt Tightener Pivot Grease 1 Blower Drive GHS Model O...

Page 53: ...tructions LUBRICATION 49 2 10 13 11 12 23 25 23 24 27 26 2 1 1 4 8 7 7 29 29 32 31 30 28 28 32 37 33 21 22 31 38 35 36 34 9 41 40 14 39 15 16 21 3 4 5 6 7 7 8 9 15 14 17 18 19 20 16 Chassis and Deck Lubrication Points ...

Page 54: ...initial stage of air clean ing Dust particles are exhausted through a single small vent in the side of the housing Since no dust is trapped the precleaner operates without clean ing The only maintenance required is to check the operation of the internal fan every 100 hours Verify operation 1 Look into the exhaust vent while shining a light into the intake 2 Start the engine and watch the fan begin...

Page 55: ...r after six 6 cleanings or when dirty or dam aged More frequent cleaning may be required when operating in extremely dusty conditions as in dicated by the air restriction gauge Service the air cleaner as follows 1 Release the top and bottom cover latches and remove the air cleaner cover Wash the cover and Vacuator valve Check that these com ponents are in good condition The Vacuator valve is subje...

Page 56: ... petroleum based lubri cants on the sealing surfaces of the filter use tal cum powder or dry silicone lubricants if required for filter installation Air Filter Element Replacement 9 Install the cover with the word TOP properly oriented to the top of the canister Give the cov er a slight twist as it reaches the canister to make sure the tab inside the cover goes into a slot otherwise the cover will...

Page 57: ...e to reinstall the access panels before op erating the engine Engine Air Intake Screen and Cooling Fin Access Panels Cooling System Airflow Grass Buildup in Mower Housing 1 Raise the deck lock lever handle on each side of the carrier frame and pull out to release car rier frame for tilting action 2 Using the carrier frame lift handle raise deck to the TILT UP position and insert the deck hook into...

Page 58: ... off of the blower pulley The belt should be clear of the blower pulley allowing free movement of the blower wheel IMPORTANT With the belt removed the blow er wheel must spin freely Any binding or drag ging of the wheel is an indication of dirt buildup This buildup must be cleaned to avoid abrasive wear of the blower blades ex cessive power loss and eventual loss of blower performance clogging 2 U...

Page 59: ...iltration Components NOTE The following inspection is only an exter nal inspection and should be done without dis turbing the filtration components On a daily basis visually inspect the external condi tion of the complete air cleaner system The follow ing items should be inspected 1 Check the Donaldson Radialseal air cleaner canister for damage Make sure the cover is in place and the cover latches...

Page 60: ...en when mowing abrasive type grass or operating on sandy soils Replace blades if worn bent cracked or otherwise damaged refer to REPLACING RE PAIRINGthe Mower Bladesinthis section Use the following procedure to check and sharpen blades NOTE Keep blades sharp cutting with dull blades not only yields a poor mowing job but slows the cutting speed of the mower and causes extra wear on the engine and b...

Page 61: ...gnetic Wall Mounted Balancer 7 Mount the blade with wing tips pointing up into the housing Reinstall the blade washer lock washer and nut Tighten the nut to 60 ft lb 81 3 N m NOTE When reinstalling blades on GHS models remember the blades turn toward each other counter rotate and the RH and LH blade cannot be switched Check for proper blade rotation before in stalling blades on the deck Refer to B...

Page 62: ...el Lines and Clamps Every year inspect the fuel supply line from the tank to engine for deterioration or damage Also inspect the fuel line clamps for tightness Good preventive maintenance calls for complete replacement of fuel lines and clamps every two 2 years Engine Starter Yearly or every 500 hours disassemble and clean the solenoid shift starter Refer to the Kohler Service Manual for this proc...

Page 63: ...individual belts on GHS models or three 3 belts on SD models Engine PTO Drive Belt 3 Groove Power Band Jackshaft Drive Belt GHS Blower Drive Belt GHS Model Only Hydrostatic Ground Drive Belt The belts may be removed and replaced using the procedures described on the following pages DANGER To prevent accidental starting of the en gine when replacing parts or repairing the machine remove the key fro...

Page 64: ...Maintenance Instructions REPLACING REPAIRING 60 Jackshaft Drive Belt Engine PTO Belt GHS Blower Belt GHS Model Only Hydrostatic Ground Drive Belt Belt Locations ...

Page 65: ...sition to lift the clutch idler away from the belt d Next remove the belt from the engine pul ley and then the PTO drive pulley 2 Install the PTO drive belt by reversing the re moval procedure IMPORTANT Make sure the belt is installed inside the four 4 belt guide pins Refer to ADJUSTMENTS of Blade Clutch PTO in this section to check and make the fol lowing adjustments a Clutch engagement for prope...

Page 66: ...ive Belt Engaged Jackshaft Drive Belt Disengaged Idler Pulley Engine Pulley Tension Spring Jackshaft Jackshaft Drive Belt Push Idler Pulley b Relax the belt by depressing the spring loaded idler arm c Roll the belt off the jackshaft pulley and remove 2 Reverse the removal procedure to replace the jackshaft drive belt Idler Arm Jackshaft Jackshaft Drive Belt Tension Spring Engine Pulley ...

Page 67: ... the blower pul ley Lift the belt tightener idler pulley up and roll belt off the pulleys Blower Pulley Belt Tightener Idler Pulley Disengaged Blower Drive Pulley GHS Blower Drive Belt Idler Pulley Engaged GHS Blower Drive Belt Assembly Disengaged Blower Drive Belt Spring Removal 2 Reverse the procedure to install the GHS blow er drive belt and spring GHS Blower Drive Belt Assembly Engaged ...

Page 68: ...x belt b Slide belt off pulleys then release the idler Hydrostatic Ground Drive Belt Idler Pulley Belt Tightener Arm Jackshaft Transmission Drive Pulley Spring Hydrostatic Ground Drive Belt Assembly Disengaged 2 Reverse the procedure to install the hydrostatic ground drive belt Belt Tightener Arm Idler Pulley Hydrostatic Ground Drive Belt Spring Hydrostatic Ground Drive Belt Assembly Engaged ...

Page 69: ...ox from damage if the blade encounters a shock load Cutting Blade Shear Bolts NOTE Tightening the 5 8 18 blade mounting nut to 60 ft lb 81 3 N m is also important for proper shock load protection It is important to not over tighten the mounting nut since this defeats over rides the function of the shear bolts If these bolts shear remove the blade and install new bolts Refer to CHECKING SERVICING i...

Page 70: ...t refer to Mower Deck Gearbox Replacement in this section Mower Blades Mower blades are removed and remounted as de scribed in Sharpen Mower Blades instructions During the course of sharpening and inspecting mower blades if there are any of the following con ditions of wear or damage blades should be re placed for reasons of safety and performance of the machine An excessive amount of the flat sec...

Page 71: ...nt before reassembly 5 Drain and properly dispose of oil 6 Remove the four 4 bolts mounting the gearbox to the connector tube and slide the gearbox off the splined drive shaft coupling 7 Install the new gearbox on the spline coupling of the drive shaft Establish correct timing of the blade drive gearboxes by setting flats on the output shaft at 90 degrees when connecting the gearbox es to the spli...

Page 72: ...using to the frame d Lower the blower assembly straight down out of the chassis frame and remove Blower Wheel Removal When required replace the blower wheel using the following procedure 1 Loosen blower pulley set screws and remove the pulley using a wheel puller 2 Remove the locking collar from the back bear ing closest to the pulley by loosening the set screw and rotating the collar counterclock...

Page 73: ...aring race and the housing 4 Install the locking collar on the rear bearing and install the blower pulley to complete the blower assembly Torque the blower pulley set screws to 250 in lb 28 3 N m GHS Blower Assembly Installation Reinstall the blower assembly into the mower using the reverse procedures of GHS Blower Assembly Removal Wheel Puller Hooked to Lugs on Bearing Housing Blower Pulley 5 16 ...

Page 74: ...an operator on the seat the engine starts and continues to run with the Forward Speed Con trol FSC and or PTO engaged With an operator in the seat the Forward Speed Control FSC and PTO disengaged and panel horn works but the starter is not engaging Steering Levers An adjustment range of approximately 3 inches is available on the steering levers the levers can be adjusted forward or aft depending o...

Page 75: ...PTO Clutch Disen gaged illustrations Adjust the bolt head clearance 1 4 in to 3 8 in 6 35 mm to 9 53 mm first clutch engaged then adjust uncompressed spring length clutch dis engaged The spring must be adjusted to an un compressed overall length of 2 in 51 mm If ad justments are needed more frequently than every 100 hours to maintain the linkage dimensions it may suggest problems with pulley wear ...

Page 76: ...e blade brake is activated by the brake actuator rod linkage to the clutch idler pulley mechanism The brake is designed to stop the blades within five 5 seconds after disengaging the clutch WARNING It is important to check and maintain blade brake action for safe operation of the machine PTO Clutch Disengaged Spring Overall Length 2 in 51 mm Knuckle Joint Adjustment Nut Spring Uncompressed Blade C...

Page 77: ...mm pulley travel from clutch engaged to clutch disengaged To check and adjust the pulley travel first engage the clutch then measure the dis tance the pulley moves down as the clutch is disen gaged and the stop block contacts the frame NOTE The importance of this adjustment is if the pulley travel is excessive and the belt develops too much slack the belt will derail when disengaged Clutch Idler P...

Page 78: ...fe of the transmission These stops are properly adjusted at the factory and should only re quire readjustment if the transmission or related control linkage is removed or changed NOTE It would not be unusual for a new machine after initial 5 or 10 hours of operation to begin to not travel straight this is due to the break in of the transmissions In this case proceed to Straight Ground Travel Adjus...

Page 79: ...on Adjustment 3 If drive wheels are moving stop the engine and adjust the FSC neutral stop by adjusting the FSC actuator clevis see Neutral Function Ad justment photo for clevis location If the drive wheels are moving backward remove the cotter pin and clevis pin and screw the clevis forward If the drive wheels are moving forward screw the clevis backward Restart the engine and check for wheel mov...

Page 80: ... LH wheel is moving too fast tighten the LH adjustment nut Straight Ground Travel Adjustment Forward Speed Control Friction Lock The FSC friction lock is adjusted to hold the select ed forward speed when the steering levers are moved and yet the friction is not too heavy to make moving the control difficult too much friction The procedure for checking and adjusting the FSC friction lock is as foll...

Page 81: ...uirements of mod ern carburetors refer to the Kohler Service Manual or contact an authorized Kohler engine dealer for carburetor adjustments and service not described in this section Since the carburetor main jet is non adjustable for operation above 5000 ft 1 524 m above sea level it may be necessary to change the carburetor main jet for best fuel economy and power Contact an au thorized Kohler d...

Page 82: ...se wires bypassing switch b Turn the ignition switch ON and move the blade clutch to the ENGAGED position engine not running to make the horn sound c If the horn does not sound the horn is bad and needs to be replaced d If the horn does sound proceed to step 2 2 Check the Grass Pak switch a Reconnect the wires to the Grass Pak switch electric connector plug b Turn the ignition switch ON and move t...

Page 83: ...unplugging any wiring connectors or making re pairs on the electrical system Circuit Breakers A master circuit breaker is mounted on a bracket be hind the battery The circuit breaker may have either the manual or automatic reset function both types have been used See Circuit Breaker Location photo Circuit Breaker Location Grass Pak Vane Switch 30 Amp Circuit Breaker Circuit Breaker Mounting Bracke...

Page 84: ...ERLOCK SWITCH OFF RELAY A IGNITION RELAY START PTO ON OPEN 30 87A 30 87A OFF RELAY B START RELAY START PTO ON OPEN 30 87 OPEN OFF RELAY C DELAY RELAY START RUN OPEN OPEN 30 87A WALKER MODEL MC Beginning S N 2001 49399 S1 START CIRCUIT S2 START ACCESSORY CIRCUIT M MAGNETO GROUND CIRCUIT B BATTERY CIRCUIT A ACCESSORY CIRCUIT G GROUND CIRCUIT IGNITION SWITCH CIRCUITS OFF START RUN G M B A S1 S2 B A O...

Page 85: ...81 Operator s Notes ...

Page 86: ...82 Operator s Notes ...

Page 87: ...d in the Owner s Manual for operation and maintenance B The customer shall pay any charges for making service calls and or for transporting the mower to and from the place where the inspection and or warranty work is performed 3 HOW TO OBTAIN SERVICE UNDER THIS WARRANTY Warranty service can be arranged by contacting the dealer where you purchased the mower or by contacting Walker Man ufacturing Co...

Page 88: ...oudy Temperature 32 F o 0 C o Wind Speed 5 mph 8 kmh Humidity 58 Barometric Pressure 25 0 HG 636 mm Hg Lwa 105 OPERATOR Vibration Model MC Vibration Level Vibration levels at the operators handles were measured in the vertical lateral and longitudinal directions using calibrated vibration test equipment Tests were performed on 28 January 98 under the conditions listed LpA 92 0 7g General Condition...

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