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Walker MT 20.0 HP Owner's Manual

Manual is about: 20.0 / 25.0 HP Rider Lawnmower

Summary of MT 20.0 HP

  • Page 1

    Owner’s manual safety, assembly, operating, and maintenance instructions model mt (20.0 / 25.0 hp) (covers serial numbers 95-21329 and on) please read and save these instructions effective date: 08-14-98 for safety, read all safety and operation p/n 8000-1 instructions prior to operating machine pri...

  • Page 2: Foreword

    Foreword thank you. . .For purchasing a walker mower. Every effort has been made to provide you with the most reliable mower on the market, and we are sure you will be among our many satisfied custom- ers. If for any reason this product does not perform to your expectations, please contact us at (97...

  • Page 3: Table Of Contents

    Table of contents general information ________________ 1 highlighted information _____________ 1 glossary ____________________________ 1 identifying number locations ________ 1 engine serial number location ______ 2 servicing of engine and drivetrain components__________ 2 specifications ___________...

  • Page 4: Table Of Contents

    Table of contents maintenance instructions __________ 44 maintenance schedule chart _______ 44 important tips for care of the kohler engine _____ 45 fuel system _________________________ 45 starting/stopping _____________________ 45 cooling system ______________________ 45 air cleaner system _______...

  • Page 5: General Information

    General information 1 highlighted information walker manufacturing recommends that any ser- vice requiring special training or tools be performed by an authorized walker mower dealer. There are several general practices to be aware of in the area of safety. Most accidents associated with the oper- a...

  • Page 6: General Information

    General information 2 tractor serial number location mower deck serial number location engine serial number location refer to the engine manual that accompanies this manual for the location of the engine serial number. For the mower model covered by this manual, an en- gine manual is available cover...

  • Page 7: Specifications

    Specifications 3 model mt 20.0 hp mt 25.0 hp engine manufacturer/model kohler ch20, 2 cyl., gasoline (air cooled) kohler ch25, 2 cyl., gasoline (air cooled) displacement 38.1 cu. In. (624 cc) 44.0 cu. In. (725 cc) hp (@ 3600 rpm) 20.0 25.0 max. Rpm (no load) 3750 3750 governed rpm 3600 3600 max. Tor...

  • Page 8: Specifications

    Specifications 4 model mt 20.0 hp mt 25.0 hp transmission (continued) service brake dynamic braking through hydrostatic transmission dynamic braking through hydrostatic transmission parking brake mechanical pin lock in transmission gear mechanical pin lock in transmission gear neutral transmission r...

  • Page 9: Specifications

    Specifications 5 model mt 20.0 hp mt 25.0 hp tire pressure deck caster wheel 20 psi (137 kpa) 20 psi (137 kpa) drive 15 psi (103 kpa) 15 psi (103 kpa) rear 20 psi (137 kpa) 20 psi (137 kpa) dimensions (tractor and mower)* length 91 in. (231 cm) 91 in. (231 cm) width 49 in. (124 cm) 49 in. (124 cm) h...

  • Page 10: Specifications

    Specifications 6 model mt 20.0 hp mt 25.0 hp drive belts engine pto walker p/n 8230 walker p/n 8230 jackshaft drive gates 3vx355 (or walker p/n 6231) gates 3vx355 (or walker p/n 6231) ground drive, micro-v walker p/n 7248 walker p/n 7248 blower (ghs model) gates 3vx280 (or walker p/n 7234) gates 3vx...

  • Page 11: Component Identification

    Component identification 7 front view and right side view note: control identification shown in operating instructions section. Grass handling system 7.0 bushel catcher anti-scuff roller transmission control rod adjustment nut (rh) deck support arms transmission control rod adjustment nut (lh) deck ...

  • Page 12: Component Identification

    Component identification 8 catcher door gas spring instrument panel guard instrument panel box (shock mounted) deck lift rod left hand drive wheel muffler tailpipe oil drain plug catcher door handle dump plate catcher door anti-scuff roller oil filter tailwheel fork and wheels removable grass catche...

  • Page 13: Component Identification

    Component identification 9 air restriction indicator (not visible) air intake hose (primary to secondary) air cleaner base plate fuel pump engine air cleaner (secondary) muffler grass shield throttle and choke linkage muffler heat shield oil dipstick/oil fill rubber bumper (catcher support) muffler ...

  • Page 14: Safety Instructions

    Safety instructions 10 pay particular attention to any information labeled danger, warning, caution, important, and note in this manual. When you see the safety alert symbol ( ), read, understand, and follow the instructions. Fail- ure to comply with safety instructions may result in personal injury...

  • Page 15: Safety Instructions

    Safety instructions 11 6. Do not wear loose fitting clothing that could get caught in moving parts. Do not operate this machine while wearing shorts; always wear adequate protective clothing, including long pants. Wearing safety glasses, safety shoes, and a helmet is advisable and required by some l...

  • Page 16: Safety Instructions

    Safety instructions 12 10. Disengage the blade drive when transporting the machine across drives, sidewalks, etc. Ne- ver raise the mower deck while blades are rotating. 11. The maximum recommended side slope op- erating angle is 20 degrees or 33% grade. When operating the machine on a slope, reduce...

  • Page 17: Safety Instructions

    Safety instructions 13 4. Perform only maintenance instructions de- scribed in this manual. Unauthorized main- tenance operations or machine modifications may result in unsafe operating conditions. 5. If the engine must be running to perform a main- tenance adjustment, keep hands, feet, and clothing...

  • Page 18: Safety Instructions

    Safety instructions 14 adjacent to blower discharge chute through body (5804) sd deck discharge shield (5848) front body adjacent to rh steering lever (7818) hydrostat oil reservoir (5810) on body adjacent to clutch control lever (5806) right side of front body, below front body latch release (7820)...

  • Page 19: Safety Instructions

    Safety instructions 15 instrument panel (8823) fender, rh side (7802) catcher door hinge bar, lh and rh sides (5868) left side of operator seat (7819) right side, below operator seat (7809) top of blower housing (5819) deck carrier frame (8653) jackshaft support adjacent to dipstick (7827) gear axle...

  • Page 20: Assembly Instructions

    Assembly instructions 16 setup instructions walker mowers are shipped partially assembled. After uncrating the tractor and mower deck, initial setup is required. Note: during the process of unpacking, any dam- aged or missing parts should be noted and reported to the delivering carrier immediately (...

  • Page 21: Assembly Instructions

    Assembly instructions 17 3. After the battery is filled with electrolyte, replace the filler caps and charge the battery. Refer to battery charging. Battery charging 1. Charge the battery at 15 amps for 10 minutes. Do not exceed 20 amps maximum recom- mended charging rate. Charge until specific grav...

  • Page 22: Assembly Instructions

    Assembly instructions 18 deck caster wheel installation note: if semi-pneumatic wheels are installed, make sure the spacer washers fit over the spacer tube and are not caught between the fork and the end of the tube. The washers should move freely on the axle spacer tube. 5. Grease the caster wheel ...

  • Page 23: Assembly Instructions

    Assembly instructions 19 note: when installing the dsd52 or dsd62 mower deck, make sure to retract the dolly wheel after mounting the deck on the tractor. 3. If the deck is rear discharge (ghs equipped model), the rear discharge chute will need to be aligned and connected to the blower inlet dur- in...

  • Page 24: Assembly Instructions

    Assembly instructions 20 deck counterweight spring installation deck leveling 1. Position mower on a smooth, level surface. Set the cutting height to the highest position - 4 in. (102 mm) - for easy access under the deck to measure blade height. Refer to adjusting cutting height in operating instruc...

  • Page 25: Assembly Instructions

    Assembly instructions 21 preoperating checklist before operating the mower for the first time, and as a routine before daily operations, it is important to make sure the mower is properly prepared and ready for operation. The following is a list of items to be checked. (for a mower with frequent ope...

  • Page 26: Assembly Instructions

    Assembly instructions 22 check gear axle oil level refer to gear axle lubrication in maintenance in- structions . Inspect four (4) drive belts engine pto drive, jackshaft drive, hydrostatic ground drive, and ghs blower drive (if equipped). Check hydrostatic transmission oil level refer to lubricatio...

  • Page 27: Assembly Instructions

    Assembly instructions 23 check mower blade condition, sharp- ness, and security of mounting the blade mounting nut should be tightened to 60 ft-lb (81.3 n ⋅ m). If blade sharpening is required, refer to checking/servicing for sharpen mower blades in maintenance instructions . Adjust mower cutting he...

  • Page 28: Operating Instructions

    Operating instructions 24 control identification, location, and function operating controls engine choke the choke control lever (black knob) is located on the left side of the seat. To start a cold engine, move the choke control forward to the on position. After engine starts, move the choke contro...

  • Page 29: Operating Instructions

    Operating instructions 25 choke and throttle location engine throttle the throttle control lever (red knob) is located on the left side of the seat and is used to control engine speed. Moving the lever forward toward the fast position increases engine speed; moving it back- ward toward the idle posi...

  • Page 30: Operating Instructions

    Operating instructions 26 front body latch release the front portion of the tractor body hinges forward for maintenance access and is latched down in the operating position. To raise the body, move the latch release forward. Front body latch release transmission lockout levers the transmission locko...

  • Page 31: Operating Instructions

    Operating instructions 27 choke throttle blade clutch (pto) pull up to engage parking brake intermediate ground speed position the forward speed control also establishes the neutral-park position of the steering levers left wheel steering lever right wheel steering lever reverse drive wheel motion p...

  • Page 32: Operating Instructions

    Operating instructions 28 instrument panel instrument panel this illustration shows the configuration of the switches and indicators located on the instrument panel. Hourmeter voltmeter oil pressure warning light over temperature warning light ignition switch light switch (optional) warning horn.

  • Page 33: Operating Instructions

    Operating instructions 29 hourmeter the hourmeter displays operating time accumu- lated while the ignition switch is in the on position. Voltmeter the voltmeter displays battery and charging system voltage. An indication of low or high voltage (below 11.5 volts or above 15.5 volts) indicates an elec...

  • Page 34: Operating Instructions

    Operating instructions 30 starting the engine 1. Before attempting to start the engine, make sure the operator is in the seat, the forward speed control is in neutral-park position, and the blade clutch and parking brake are disengaged. Note: release parking brake to prevent extra load on the starte...

  • Page 35: Operating Instructions

    Operating instructions 31 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 or dsd62 mower deck is installed on the tractor, make sure the ...

  • Page 36: Operating Instructions

    Operating instructions 32 correct operator hand position on the controls 3. Reverse direction of the mower by pulling both levers backward. Note: smooth action on the steering levers will produce smooth mower operation. Remem- ber to keep the engine and ground speed slow until learning the control r...

  • Page 37: Operating Instructions

    Operating instructions 33 blade clutch engaged blade clutch disengaged stopping the machine 1. Slow the engine to a fast idle; put the throttle in the 1/2 throttle position. 2. Pull the steering levers to the neutral posi- tion and then move the fsc lever backward to the neutral-park position. 3. Di...

  • Page 38: Operating Instructions

    Operating instructions 34 adjusting cutting height cutting height is adjusted by positioning the four re- tainer hitch pins in a series of seven vertical holes on the deck support pins. Lift handles have been pro- vided on each end of the deck to assist in raising the deck while positioning the hitc...

  • Page 39: Operating Instructions

    Operating instructions 35 recommendations for mowing important: operate the engine at full speed when mowing, to allow the engine to produce full horsepower and to increase efficiency of the engine cooling system. • keep the mower deck and discharge chute clean. • mow with sharp blades. A dull blade...

  • Page 40: Operating Instructions

    Operating instructions 36 recommendations for tilt-up deck operation/transport to avoid potential deck and/or tractor damage while using the tilt-up deck, the following recommenda- tions are offered: • do not move the tractor with the deck in the tilt- up position since both the roller wheels (on th...

  • Page 41: Operating Instructions

    Operating instructions 37 grass handling system (ghs) ghs model only ghs flow and components pto and blade gear drive pto clutch rear discharge mower deck deck discharge chute blower body chute assembly powerfil ® delivery spout grass catcher catcher door spring catcher door exhaust deflector exhaus...

  • Page 42: Operating Instructions

    Operating instructions 38 general information the grass handling system (ghs) consists of a rear discharge mower deck connected to a 10 in. (25 cm) blower and a rear mounted grass catcher with 7.0 bushel (246 liters) capacity or optional 9.5 bushel (335 liters) capacity. The ghs blower oper- ates an...

  • Page 43: Operating Instructions

    Operating instructions 39 clogging checklist in case of clogging, there will be a distinct change in the sound of the blower, i.E., the blower sound will stop. Also, the mower deck will begin to leave a trail of grass clippings. When this occurs, stop the engine, disconnect the spark plug wires, and...

  • Page 44: Operating Instructions

    Operating instructions 40 • check that the openings in the removable air exhaust screen in the grass catcher are not plugged. If the screen is clogged, refer to cleaning the ghs exhaust screen in this section. Remember, anything that restricts airflow or material flow along the entire path from the ...

  • Page 45: Operating Instructions

    Operating instructions 41 dumping the catcher for dumping, the catcher either tailgate dumps into a disposal area or dumps into the optional dump bag. The dump bag is a reusable nylon fabric bag designed to conveniently move grass clippings from the catcher to a remote disposal area or container. Ta...

  • Page 46: Operating Instructions

    Operating instructions 42 3. Hook the bottom of the bag over the rear bumper while lifting on the handle strap. 4. Tilt the catcher back to dump into the bag by lift- ing on the catcher lift handle on the lower front corner of the catcher with the one hand while continuing to hold up on the bag stra...

  • Page 47: Operating Instructions

    Operating instructions 43 power dump components grass catcher cable guide catcher door gas spring catcher door cable rod guide cable assembly actuator mount assembly dog leg assembly fork lift channel door actuator arm gas spring rubber bumper power dump ram actuator.

  • Page 48: Maintenance Instructions

    Maintenance instructions 44 maintenance schedule chart - recommended service intervals - model mt service item daily 25 hours 100 hours 200 hours yearly every 2 years ref. Page check engine crankcase oil level x 46 check/clean engine air cooling system* x 57 check security of air filtration componen...

  • Page 49: Maintenance Instructions

    Maintenance instructions kohler tips 45 important tips for care of the kohler engine fuel system • fuel must be clean - free from water, dirt, and or- ganic material. • change fuel filter on a regular basis and when contamination is suspected or found in the fuel. Starting/stopping • for starting in...

  • Page 50: Maintenance Instructions

    Maintenance instructions lubrication 46 lubrication proper lubrication is an important maintenance pro- cedure. It reduces wear and makes the machine qui- eter and easier to operate. Engine oil engine break-in oil no special break-in oil is required. The engine is serviced with 10w-30, service class...

  • Page 51: Maintenance Instructions

    Maintenance instructions lubrication 47 1. Park the mower on a level surface with the en- gine stopped. The engine oil should be warm before draining. If not warm from operation, start the engine and run a few minutes to warm the oil. 2. Remove the dipstick and the oil drain plug and drain the oil i...

  • Page 52: Maintenance Instructions

    Maintenance instructions lubrication 48 ident lubrication no. No. Location type places ident lubrication no. No. Location type places 1 deck caster wheel fork pivot grease 2 2 deck caster wheel bearing grease 2 3 tee gearbox, deck oil * 1 4 blade drive gearbox oil * 2 5 pto shaft guard hinge oil 1 6...

  • Page 53: Maintenance Instructions

    Maintenance instructions lubrication 49 chassis and deck lubrication points.

  • Page 54: Maintenance Instructions

    Maintenance instructions lubrication 50 mower deck gearbox lubrication note: these instructions apply to all mower decks with gear-driven blades. Refer to dsd52 or dsd62 mower deck lubrication in this section for the dsd52 or dsd62 deck with belt-driven blades. The mower deck gearboxes (tee gearbox ...

  • Page 55: Maintenance Instructions

    Maintenance instructions lubrication 51 2. Check the oil level in the belt drive gearbox ev- ery 100 hours (or sooner if a visible oil leak has developed). With the deck in the normal oper- ating position, remove the level plug in the side of the gearcase. Add sae e.P. (extreme pres- sure) 90w oil t...

  • Page 56: Maintenance Instructions

    Maintenance instructions lubrication 52 hydrostatic transmission fluid checking hydrostatic transmission fluid level hydrostatic transmission fluid level should be checked every 25 hours of machine operation. It is preferable to check the fluid level when fluid is cold. Check fluid level as follows:...

  • Page 57: Maintenance Instructions

    Maintenance instructions lubrication/cleaning 53 3. Reinstall the lower drain plug, making sure the rubber o-ring on the plug is in place and in good condition. 4. Refill the transmission through the air bleed plug hole until it is as full as possible. Important: avoid fluid contamination when filli...

  • Page 58: Maintenance Instructions

    Maintenance instructions cleaning 54 turbine precleaner the turbine precleaner is mounted on a remote air intake tube connected to the donaldson air cleaner. A spinning fan driven by the intake airflow separates dust from the air, giving the initial stage of air clean- ing. Dust particles are exhaus...

  • Page 59: Maintenance Instructions

    Maintenance instructions cleaning 55 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 subject to wear and deterioration and should be replaced yearly or when d...

  • Page 60: Maintenance Instructions

    Maintenance instructions cleaning 56 kohler air cleaner (secondary) note: the kohler air cleaner should only be ser- viced more often than a yearly interval if there are indications that the donaldson radialseal (prima- ry) has failed. • foam precleaner an oiled, foam precleaner surrounds the paper ...

  • Page 61: Maintenance Instructions

    Maintenance instructions cleaning 57 air filter reinstallation engine cooling system air intake system to prevent engine overheating and possible engine damage, clean grass clippings, chaff, and dirt from the rotating engine air intake screen after every 8 hours of operation. In certain mowing condi...

  • Page 62: Maintenance Instructions

    Maintenance instructions cleaning 58 grass buildup in mower housing non-tilting decks 1. Raise the deck and secure it in the up position by hooking the deck lift rod into the body bracket below the counterweight spring clip. The rod is hinged and is stowed along the footrest of the deck carrier fram...

  • Page 63: Maintenance Instructions

    Maintenance instructions cleaning 59 note: while some degree of material buildup in the mower deck housing can be tolerated, a point is finally reached where cutting quality deteriorates and clogging begins to occur because of too much buildup on the baffling and housing. 4. Lower the deck to the no...

  • Page 64: Maintenance Instructions

    60 maintenance instructions cleaning/ checking/servicing hydrostatic transmission cooling fins keeping the cooling fins on the hydrostatic transmis- sions clean and free of obstruction is essential to avoid overheating the transmission fluid and short- ening transmission life. The cooling fins shoul...

  • Page 65: Maintenance Instructions

    61 maintenance instructions checking/servicing 3. Replace filler caps. Important: do not overfill the battery. Electro- lyte will overflow through the vented caps onto parts of the machine and will result in severe corrosion. Cleaning the terminals if battery terminals are corroded, remove battery f...

  • Page 66: Maintenance Instructions

    Maintenance instructions checking/servicing 62 4. If the blade cutting edge is dull or nicked, it should be sharpened. Remove blades for sharpening by grasping the end of the blade us- ing a rag or a thick, padded glove, while loosen- ing and removing the nut, lock washer, and flat washer that mount...

  • Page 67: Maintenance Instructions

    63 maintenance instructions checking/servicing/ replacing/repairing mower deck gearbox oil seals the mower deck gearbox seals should be inspected every 25 hours for evidence of oil leaking; particu- larly the lower oil seal on the blade drive gear- box. This seal is protected by the trash guard on t...

  • Page 68: Maintenance Instructions

    Maintenance instructions replacing/repairing 64 jackshaft drive belt engine pto belt ghs blower belt (ghs model only) hydrostatic ground drive belt belt locations.

  • Page 69: Maintenance Instructions

    Maintenance instructions replacing/repairing 65 engine pto drive belt (3 groove power band) 1. To remove the engine pto drive belt: a. Remove the jackshaft drive belt from its idler pulley (by pushing down on idler pul- ley) and let the belt drop down out of the way. Note: step (a) is not essential ...

  • Page 70: Maintenance Instructions

    Maintenance instructions replacing/repairing 66 jackshaft drive belt 1. To remove the jackshaft drive belt: a. Remove the engine pto drive belt, as described in previous section. Jackshaft drive belt (engaged) jackshaft drive belt (disengaged) push idler pulley down to relax belt idler pulley engine...

  • Page 71: Maintenance Instructions

    Maintenance instructions replacing/repairing 67 ghs blower drive belt 1. Remove the ghs blower drive belt by unhook- ing the belt tension spring from the hook on the chassis frame (located above the blower pul- ley). Lift the belt tightener idler pulley up and roll belt off the pulleys. Chassis fram...

  • Page 72: Maintenance Instructions

    Maintenance instructions replacing/repairing 68 hydrostatic ground drive belt 1. To remove the hydrostatic ground drive belt: a. Raise the spring-loaded belt tightener arm and idler pulley to relax belt. B. Slide belt off pulleys, then release the idler. Hydrostatic ground drive belt idler pulley be...

  • Page 73: Maintenance Instructions

    Maintenance instructions replacing/repairing 69 fuel filter model mt is equipped with an in-line fuel filter. Vi- sually inspect the filter periodically, and replace the filter yearly. Fuel filter location important: replace the fuel filter only in a clean area where the fuel line and connections wi...

  • Page 74: Maintenance Instructions

    Maintenance instructions replacing/repairing 70 after reinstalling the blade, check blade timing by moving blades through one (1) complete revolu- tion.Make sure blade tips pass clear of each other. If timing is incorrect, refer to mower deck gearbox replacement in this section. Mower blades mower b...

  • Page 75: Maintenance Instructions

    Maintenance instructions replacing/repairing 71 note: with oil flow throughout the unitized gear drive assembly; if one gearbox has internal damage or excessive wear, the remaining gear- boxes and connector tubes should be complete- ly disassembled and thoroughly flushed out with solvent before reas...

  • Page 76: Maintenance Instructions

    Maintenance instructions replacing/repairing 72 4. Remove the blower assembly from the chassis as follows: a. Remove the blower skid bar by removing front and rear mounting bolts from the skid bar (underneath the blower) and removing the bolt connecting the blower housing to the skid bar. B. Remove ...

  • Page 77: Maintenance Instructions

    73 maintenance instructions adjustments adjustments safety switches there are three (3) safety interlock switches on the tractor. Use the panel nuts on the switch body to po- sition the switch for proper activation of the switch. The adjustment procedure for each switch is: seat switch adjust switch...

  • Page 78: Maintenance Instructions

    Maintenance instructions adjustments 74 blade clutch (pto) clutch engagement/belt tension the clutch engagement and pto belt tension are adjusted using the clutch actuator rod. Initially, after installing a new pto belt, after 10 hours and every 100 hours thereafter, check and adjust for the two dim...

  • Page 79: Maintenance Instructions

    Maintenance instructions adjustments 75 clutch disengagement/brake action the declutched or disengaged position of the blade clutch idler pulley is adjustable and is set to give belt release without excessive slack and to apply the blade brake. The blade brake is activated by the brake actuator rod ...

  • Page 80: Maintenance Instructions

    Maintenance instructions adjustments 76 use the following procedures to check and adjust clutch disengagement and brake action: stop block eccentric adjustment - step 1 use the stop block attached to pto belt tightener arm to set the bottom position of the clutch idler pul- ley in the disengaged pos...

  • Page 81: Maintenance Instructions

    Maintenance instructions adjustments 77 blade brake band adjustment note: the length of the actuator rod is adjusted by disconnecting the bottom clevis and shortening or lengthening accordingly. The standard pre-set length of the actuator rod is set at the factory at 8-1/4 in. (209 mm). Brake actuat...

  • Page 82: Maintenance Instructions

    Maintenance instructions adjustments 78 3. Tighten the jam nut on the forward travel stop adjusting bolt. Forward speed control stop and steering lever adjustment steering lever end play adjustment - step 2 1. Position the fsc lever to the most forward position. 2. Loosen the adjustment nut on each ...

  • Page 83: Maintenance Instructions

    Maintenance instructions adjustments 79 straight ground travel adjustment - step 4 1. Sit in the seat, start the engine (operate at nor- mal speed), and with the fsc in the neutral- park position check for forward movement of either drive wheel (if either wheel moves backward, refer back to neutral ...

  • Page 84: Maintenance Instructions

    Maintenance instructions adjustments 80 tilt-up deck adjustable stop when the carrier frame hinge joint is properly adjust- ed, the deck lock levers should move in and out of the engaged and disengaged positions freely. All four hitch pins used for height adjustment should sit flush on the washers a...

  • Page 85: Maintenance Instructions

    Maintenance instructions adjustments 81 2. Preliminary setting: turn the idle mixture nee- dle valve out (counterclockwise) 1-1/2 turns from the closed position. This initial adjust- ment will allow the engine to be started and warmed up prior to the final adjustment. Carburetor adjustment 3. Start ...

  • Page 86: Maintenance Instructions

    82 maintenance instructions adjustments/ electrical system checking the grass-pak ® switch adjustment (when horn sounds at the wrong time) very little, if any, adjustment to the grass-pak ® switch is required. However, to fine tune the timing of the full signal, the vertical position of the switch v...

  • Page 87: Maintenance Instructions

    83 maintenance instructions electrical system wiring diagram - model mt.

  • Page 88: Operator’S Notes

    84 operator’s notes.

  • Page 89: Operator’S Notes

    85 operator’s notes.

  • Page 90: Operator’S Notes

    86 operator’s notes.

  • Page 91

    87 limited warranty for walker commercial rider mower 1. What this warranty covers, and for how long: walker manufacturing company will, at its option, repair or replace, without charge, any part covered by this warranty which is found to be defective in material and/or workmanship within one (1) ye...

  • Page 92

    Walker mfg. Co. • 5925 e. Harmony road, fort collins, co 80528 • (970) 221-5614 form no. 101298 printed in usa © 1998 walker mfg. Co sound - model mt20 sound test sound test conducted was in accordance with 79/113/eec and was performed on 22 march 96 under the conditions listed: general condition: c...