Walker Model MT manuale d’uso

OWNER’S MANUAL Safety , Assembly , Operating, and Maintenance Instructions Model MT (23.0 HP) Model MTL (25.0 HP) Model MTEFI (26.0 HP) Model MTLEFI (31.0 HP) Please Read and Save These Instructions Effective Date: 08-09-09 For Safety , Read All Safety and Operation P/N 8000-16 Instructions Prior to Operating Machine ™[...]

For eword Thank you. . . for purcha sing a W alker mower . Eve ry ef for t has been made to provid e you with the most reliable mower on th e market, and we are sure you will be among our many satisfied custom- ers. If for any reason this product doe s not perform to your expectations, please contact us at (970) 221-5614. Every custome r is import [...]

T able 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 ____________ __________ __ 3 ENGINE _________ ____[...]

T able of Contents Maintenance Instructions __________ 57 MAINTENANCE SCHEDULE CHART _______ 57 IMPORTANT TIPS FOR CARE OF THE KOHLER ENGINE _______________ 58 Fuel System _________________ ________ 58 Starting/S topping ____________________ _ 58 Cooling System - MT, MTEFI ____________ 58 Cooling System - MTL ______ ___________ 58 Air Cleaner Syste[...]

General Information 1 HIGHLIGHTED INFORMA TION W alker Manufacturing recommends that any service requiring special training or to ols be performed by an authorized W alker Mower Dealer . There are sev- eral general practice s to be aware of in the area of safety . Most accidents associated with the opera- tion or maintenance of a W alker Mower ar e[...]

General Information 2 T ractor Serial Number Location Mower Deck Serial Number Location ENGINE SERIAL NUMBER LOCA TION Refer to the e ngine manu al that accompanies this manual for the location of the engine se ria l nu mber . For the mower model(s) covered by this manual, an engine manual is available from Kohler covering the Kohler engines. Engin[...]

Specifications 3 MODEL AIR COOLED MT (23.0 HP) MTEFI (26.0 HP) LIQUID COOLED MTL (25.0 HP) MTLEFI (31.0 HP) ENGINE Manufact ur er /Mod e l Kohler Command Pro  CH23, 2 Cyl., Gasoline (Air-Cooled) Kohler Aegis TM LH685, 2 Cyl., Gasoline (Liquid-Co oled) Kohler Command Pro  CH26, 2 Cyl., Gasoline (Air- Cooled), Electron ic Fu el Injection (EF[...]

Specifications 4 MODEL AIR COOLED MT (23.0 HP) MTEFI (26.0 HP) LIQUID COOLED MTL (25.0 HP) MTLEFI (31.0 HP) ELECTRICAL SYSTEM Battery 12 V olt, 35AH, 295 CCA 12 V olt, 41AH, 340 CCA (Interstate U1 -SP40) Charging System Flywheel Al ternator Flywheel Alternator Charging Output CH23/CH680 CH26/CH735 15 Amp DC (Regulated) 25 Amp DC (Regulated) 25 Amp [...]

Specifications 5 MODEL AIR COOLED MT (23.0 HP) MTEFI (26.0 HP) LIQUID COOLED MTL (25.0 HP) MTLEFI (31.0 HP) TRANSMISSION (continued) Ground T ravel S peed Forward m. p.h. (km/h) Reverse m.p. h. (km/h) 0-5 (0-8) Infinitely V ariable* 0-5 (0-8) Infinitely V ariable 0-7 (0-1 1) Infinitely V ariable 0-7 (0-1 1) Infinitely V ariable * 6.5 m.p.h. with Op[...]

Specifications 6 MODEL AIR COOLED MT (23.0 HP) MTEFI (26.0 HP) LIQUID COOLED MTL (25.0 HP) MTLEFI (31.0 HP) MOWER DECK Width of Cu t SD/GHS 42 or 48 in. (107 or 122 cm) 42 or 48 in. (107 or 122 cm) Cutting Height 1 to 4 in . (3 to 10 cm) 1 to 4 in. (3 to 10 cm) Height Adjustment 7 Positions - 1/2 in. (1 cm) Increment Hitch Pins Installed in Multi-P[...]

Specifications 7 MODEL AIR COOLED MT (23.0 HP) MTEFI (26.0 HP) LIQUID COOLED MTL (25.0 HP MTLEFI (31.0 HP) GHS SYSTEM (Optional) (continued) Grass Catcher Capacity 93 Gallons (352 liters)/ 10.0 Bushels 93 Gallons (352 liters)/ 10.0 Bushels Optional Grass Catcher Capa city 65 Ga llons (247 liters)/ 7.0 Bushe ls 65 Gallons (247 liters)/ 7.0 Bushels F[...]

Component Identification 8 NOTE: Control Identification shown in Operating Instructions section. Grass Handling System 10.0 Bushel Catcher S tandard 7.0 Bushel Catcher (Optiona l) (Not Shown) Anti-Scuff Roller Deck Caster Wheels Counterweight S pring and Protective Cover T ilt-Up Latch T ransmiss ion Control Rod Adjustment Nut (RH) T ransmission Co[...]

Component Identification 9 Catcher Door Gas S pring Instrument Panel Guard Left Hand Drive Wheel Catcher Door Fuel Filter (Not Visible) Removable Grass Catcher Screen (Not Visible) Catcher Lift / Dump Handle Instrument Panel Box (Shock Mounted) Oil Drain Plug Muffler Oil Filter Catcher Door Handle Anti-Sc uf f Roller Dump Plate T ailpipe T ailwheel[...]

Component Identification 10 Air Restriction Indicator Muffler Grass Shield Throttle an d Choke Linkage Oil Dipstick/Oil Fill Rubber Bumper (Catcher Support) 20 Amp Fuse (S tarter Solenoid) GHS Blower RH Hydrostatic T ransmission PTO Clutch Lever RH T ransmission Lockout Lever PT O Gearbox Dip stick Jackshaft Positive (+) Battery Cable Battery Donal[...]

Component Identification 11 Air Restriction I ndicator Muff ler Grass Shield Oil Dipstick/Oil Fill Throttle Linkage Precleaner Tu b e Fuel T ank Air Cleaner Cover Air Intake Hose Fuel Return Line Model MTEFI Fuel Pickup Line Muffle r Air Intake Plenum Ignition Coil Rubber Bumper (Catcher Suppo rt) Fuel Pump Fuel Line to Engine (High Pressu re) Dona[...]

Component Identification 12 Precleaner Tu b e Model MTL and MTLEFI Muffle r Muff ler Grass Shield Throttle Linkage (Not Visible ) Radiator Cap Radiator Hose Radiator Guard Radiator Air Intake Plenum Fuel T a nk Air Intake Hose Overflow Ta n k Overflow Hose Donaldson Air Cleaner Air Cleaner Cover Fuel Pump (Not Visible ) Air Restriction Indicator (N[...]

Safety Instructions 13 Pay particular attention to any inform ation labeled DANGER, W ARNING , CA UTION, IMPORT ANT , and NOTE in this manual. When you see the Sa fety Alert Symbol ( ), read, underst and, and fo llow the instructions. Fail- ure to comply with safety instructions may result in personal injury . The seriousness or degr ee of importa [...]

Safety Instructions 14 6. Do not we ar loose fittin g clothing that c ould get caught in moving part s. Do not operate this machine while wearing shorts; always wear adequate protective clot hing, including long pants. W earing safety glasses, safety shoes, and a helmet is advisa ble and required by some local ordinan ces and insura nce regulations[...]

Safety Instructions 15 OPERA TING 1. Operate the mower only in day light or in good artificial light with good visibility of the area being mowed. 2. Sit on the seat when st arting the eng ine and operating the machin e. Keep feet on the de ck footrests at all times when the tracto r is moving and/or mower bla des are operating. Ne ver op- erate th[...]

Safety Instructions 16 NOTE: A blade/b lower brake sho uld normally stop drive line rotation wit hin five (5) seconds of disengaging th e PT O clutch. 15. For side discharge mower decks , do not operate w ith the gras s deflector ch ute removed. Keep the defle ctor in the lowe st possible position. 16. For tractors equipped with tilt-up deck, obser[...]

Safety Instructions 17 MAINTENANCE 1. T o prevent accident al starting of the engine when servicing or adjusting th e machine, re- move the key from the ignition switch and d is- connect the sp ark plug wires. 2. T o reduce fire hazards, keep the engin e free of grass, leaves, excessive grease, and dirt. 3. Keep all nuts, bolts, and screws tight to[...]

Safety Instructions 18 Adjacent to Blower Disc harge Chute through Body (580 4) Front Body Adjacent to RH Steering Le ver (7818) On Body Adjacent to Clutch Control Lever (5806) Right Side, Behind Operator Seat (8400 -6) Rear Cross Member of Front Body (MT and MTEFI, 8825) T op of Body Grass Shield (MTL and MTLEFI, 8825) Rear of Grass Catcher Exha u[...]

Safety Instructions 19 Instrument Panel MT (8823-2), MTEFI ( 8823-3), MTL (8 823-4), MTLEFI (8823-5) Fender , RH Si de (7802) Catcher Door Hinge Bar , LH and RH Sides (5868) T op of Blower Housing (5819) Deck Carrier Frame (8653) Deck Gearbox Cover ( 5807-3) On Engine (6810) SAFETY , CONTROL, AND INSTRUCTION DECALS Safety , Control, and In structio[...]

Assembly Instructions 20 SETUP INSTRUCTIONS W alker Mowers are shipped partially assemb led. After un crating the tractor and mower deck, initial setup is required. NOTE: During the process of unpacking, a ny dam- aged or missing p art s should be noted and r eported to the delivering carrier im mediately (put in writing within 15 days). The carr i[...]

Assembly Instructions 21 T o fill (activate) battery with electrolyte (if battery has been shipped dry): 1. Remove the battery hold-down ba r , disconn ect the batter y cables and lift the battery o ut of t he tray . IMPORT ANT : Battery must be r emoved from the mower before f illing with electrolyte. IMPORT ANT : Obt ain and use only battery grad[...]

Assembly Instructions 22 Battery Installation IMPORT ANT : Make sure battery is securely mount- ed in the frame. A loo se battery ma y cause damage to the case r esulting in acid leakage and severe dam- age to the mach ine. A hazard may be create d by damage to critical work ing part s and safety systems. Install the battery in the mower as sh own [...]

Assembly Instructions 23 Deck Discharge Shield Installation (Side Discharge Models On ly) Attach the deck side disc harge shield by positioning the shield hinge lug in front of the deck mount and fastening with two (2) 3/8-16 x 1-1/4 in. bolt s, 3/8-16 ESNA nuts, an d 3/8 in. wave spring wash ers. The wave washers f it between t he two hingi ng sur[...]

Assembly Instructions 24 4. Reaching under the trac tor , join the PTO tube to the PTO shaf t (align arrow decals). Slide the PT O tube onto the spline shaft on th e tractor PT O gearbox. NOTE: When installing the DSD52 Mower deck, make sure to retr act the dolly wheel af ter mounting the deck on the tracto r . Mower Deck Inst allation (PTO Shaf t [...]

Assembly Instructions 25 Deck Leveling 1. Position mower on a smooth, level surface. Set the cutting height to the highest position - 4 in. (102 mm) - for easy ac cess under the deck to measure blade height. Refer to AD JUSTING CUTTING HEIGHT in Operating In structions . NOTE: A block of wood cut 4 in . (102 mm) hig h is a convenient gauge to measu[...]

Assembly Instructions 26 PREOPERA TING CHECKLIST Before operating the mower for the first time, and as a routine before daily opera tions, it is import ant to make sure the mower is properly prep ared and ready for operation. T he following is a list of items to be checked. (For a mower with fre quent operation, some of these items will not need to[...]

Assembly Instructions 27 CHECK ENGINE COOLING SYSTEM - Model MTL and MTLEFI  Check the radiator air int ake screen to make sure the screen is clean an d free of obstruction. Also, the radiator cooling fins should be inspected and cleaned if there is any buildup of dirt or debris. (R emove the intake screen assembly to inspect and clean.)  Che[...]

Assembly Instructions 28 CHE CK MOWER BLADE CONDITION, SHARP- NESS, AND SECURITY OF MOUNTING The blade mountin g nut should be tighte ned to 60 ft-lb (8 1.3 N · m). If blade sharpening is requir ed, refer to CHEC KING/SERVICING for Sharpen Mower Blades in Maintenance Instructions . ADJUST MOWER CUTTING HEIGHT , IF RE- QUIRED Position the hitch pin[...]

Operating Instructions 29 CONTROL IDENTIFICA TION, LOCA TION, AND FUNCTION Operating Controls Engine Choke - (Mod el M T an d MTL only ) The choke control lever (black knob) is located on the left side of the seat. T o start a cold engine, move the choke control fo rward to the ON position. After engine start s, move the choke control toward the OF[...]

Operating Instructions 30 Choke and Throttle Locat ion (MT and MTL) Engine Throttle The throttle control lever (red knob) is lo cated on the left side of the seat and is used to contro l engine speed. Moving the lever forward to ward the FA S T position increases engine speed; moving it back - ward toward the IDLE position decr eases engine speed. [...]

Operating Instructions 31 THROTTLE BLADE CLUTCH (PTO) Pull Up to Engage PA R K I N G BRAKE LEFT WHEEL STEERING LEVER Forward Pos i tio n (No Control Change) Neutral-Park Position Reverse Drive Wheel Motion Position RIGHT WHEEL STEERING LEVER The Forward S peed Control also Est ablishes the Neutral-Park Position of the S teeri ng Lev er s FORW ARD S[...]

Operating Instructions 32 Front Body Latch Relea se The front portion of the tr actor body hinges forwar d for maintenance acce ss and is latched down in the OPERA TING position. T o raise the body , move the latch release forwar d. Front Body Latch Release T ransmission Loc kout Levers The transmission lockout levers dise ngage the hy- drostatic t[...]

Operating Instructions 33 Suspension Seat (MTL and MTLEFI) A fully adjustable suspension seat is st andard on Models MTL and MTLEFI. This se at is adjustab le for back pitch, weight, lumbar support and armrest inclination. Proper adju stment for each operato r is essential to safe operation and o perator comfort. Read operating instructio ns in ful[...]

Operating Instructions 34 For Backrest ad justment, m oving the adjustment handle upward s loosens the not ching of the ba ck- rest adjustment. Refer to Figure 3. After the ad justment, the handle must lock in the de- sired position. It should no t be possible to move the backrest into another position when it is locked. For Armrest heig ht adjustm[...]

Operating Instructions 35 Instrument Panel Instrument Panel This illustration shows th e configuration of the switches and in dicators located on th e instrument pan el . Hourmeter Light Switch (Optional) Ignition Switch Wa r n i n g Horn Wa r n i n g Horn Ignition Switch Light Switch (Optional) Vo l t m e t e r Hourmeter 7 AMP Circuit Breaker 7 AM[...]

Operating Instructions 36 Wa r n i n g Horn Ignition Switch Light Switch (Optional) Vo l t m e t e r Hourmeter 7 AMP Circuit Breaker 10 AMP Circuit Breaker MTLEFI Wa r n i n g Horn Ignition Switch Light Switch (Optional) Vo l t m e t e r Hourmeter 7 AMP Circuit Breaker 10 AMP Circuit Breaker MTL W ater T emperat ure W a rning Light Oil Pressure W a[...]

Operating Instructions 37 Hourmeter The hourmeter , which is located on the instrument panel, displays operating time accumulated while the ignition switch is in the ON position. The hourmeter pro vides maintenance reminders afte r certain ho urs of operation. The hourmete r screen will start flashing the reminder one hour prior to the recommended [...]

Operating Instructions 38 Water T emperature Warning Ligh t (Model MTL and MTLEFI Only) The water temperature warnin g light indicates that engine coolant tempera ture is above the safe oper- ating limit and the engine is overheating. If this light comes on, there may be a problem with:  Radiator cooling air flow (material packed into radiator c[...]

Operating Instructions 39 Circuit Breakers Depending on model, either on e or two manual reset circuit breake rs are located on the instr ument panel. Each has a button that pop s out if the circuit breaker trips. For Models MT , MTEF I and MTLEFI, the 7 amp circuit breake r protects the saf ety circuits and GHS. For Model MTL, the 7 amp circuit br[...]

Operating Instructions 40 3. After the engine start s, make sure the oil pr es- sure light goes of f. If not, stop the en gine imme- diately and find the cause of the problem. Make sure the oil pressure light is of f prior to engaging the mower blades a nd beginning o peration. 4. For Model MT and MTL, gradually move the choke to the OFF position, [...]

Operating Instructions 41 Correct Operat or Hand Posit ion on the Controls 3. Reverse direction of the mower by pulling both levers backwar d. NOTE: Smooth action on th e steering leve rs will produce smooth mower operation. Remem- ber to keep the en gine and gro und speed slow until learning the control respo nse. 4. The FSC may be adjusted forwar[...]

Operating Instructions 42 ENGAGING THE MOWER 1. Set the engine throttle at about 1/3 speed. Do not attempt to eng age the blade clutch at high engine speed s. This will drastically short- en drive belt life. Use only moderate engin e speed when engaging the bl ade clutch. 2. Pull the blade clutch lever SLOWL Y up to en- gage the mower blades. IMPOR[...]

Operating Instructions 43 STOPPING THE MACHINE 1. Pull the steering levers to the NE UTRAL posi- tion and then move the FSC lever backward to the NEUTRAL-P ARK position . 2. Slow the engine to a f ast idle; put t he throttle in the 1/2 throttle position. 3. Disengage the blade clutch. IMPORT ANT : DO NOT disengage the blade clutch with high engine [...]

Operating Instructions 44 ADJUSTING CUTTING HEIGHT Cutting height is adjusted by positionin g the fou r re- tainer hitch pins in a series of seven ve rtical holes on the deck support pins. Lif t handles have been provided on each end of the deck to assist in raising the deck while positioning the hitch pins. Cutting heights range from 1 in. (25 mm)[...]

Operating Instructions 45 RECOMMENDA TIONS FOR MOWING A void Low Hanging Branches IMPORT ANT : Operate the engine at full th rottle when mowing, to allow the engin e to produce full horsepower and to increase ef ficiency of the engine cooling system.  Keep the mower deck and discharge chute clean.  Mow with sharp blades. A dull blade tears th[...]

Operating Instructions 46  When using a side discharge mowe r deck, the side discharge shield must not be removed an d must be kept in the lowe st possible position to deflect grass clippin gs and thrown object s down- ward. Orie nt the side discharge away from sid e- walks or streets to minimize cle anup of clippings. When mowing close to obsta[...]

Operating Instructions 47 RECOMMENDA TIONS FOR TIL T -UP DECK OPERA TION/TRANSPORT T o avoid potential deck and/or tractor dama ge while using the tilt-up deck, the following recom menda- tions are of fered:  Do not move the t ractor with the deck in the tilt- up position since both th e roller wheels (on the back of the deck) and the GHS discha[...]

Operating Instructions 48 GRASS HANDLING SYSTEM (GHS) GHS Model Only GHS Flow and Component s PT O and Blade Gear Drive PTO Clutch Rear Dischar ge Mower Deck Deck Discharge Chute Blower Body Chute Assembly Exhaust Screen (Removable ) Shear Pin Shear Bolt Catcher Door Grass-Pak ® V ane Switch Powerfil ® Delivery S pout Powerfil ® Drive Motor Actu[...]

Operating Instructions 49 General Information The Grass Handling System ( GHS) consists of a rear discharge mower deck connected to a 10.5 in. (27 cm) blower and a re ar mounted grass catcher with 10.0 bushel (352 liters) cap acity or optiona l 7.0 bushel (246 lite rs) capacity . The GHS blower oper- ates any time the m ower blade clutch is eng age[...]

Operating Instructions 50 Clogging Checklist In case of clogging, there will be a disti nct change in the sound of the blow er , i.e., the blower sou nd will stop. Also, the mower deck will begin to leave a trail of gras s clippings. When th is occurs, stop the engine, disconne ct the spar k plug wires, and m ake sure all movement has stopped bef o[...]

Operating Instructions 51  Check that the openings in th e removable air exhaust screen in the gr ass catcher are not plugged. If the screen is clogged, refer to Cleaning the GHS Exhaust Screen in this section. NOTE: An optional exhaust screen with larger holes (3/4 ") is available for use when mowing in wet grass; the screen provides le ss[...]

Operating Instructions 52 Dumping the Catcher For dumping , the catc her either tailgate dumps into a disposal area or du mps into the optional dump bag. The dump b ag is a reusable nylon fabric bag des ign ed to conveniently move grass clippings from th e catcher to a remote disposal area or contain er . T ailgate Dumping 1. Open the back door by [...]

Operating Instructions 53 3. Hook the bottom of the bag over the rear bumper while lifting on the handle strap(s) . 4. T ilt the catcher back to dump into the bag by lif ting on the catcher lif t handle on the lower front corner of the catcher with t he one hand while continuing to hold up on the bag strap(s) with the other hand. Refer to photos fo[...]

Operating Instructions 54 Hi-Dump ® Option When equipped with the optional Hi-Dump ® system, the operator raises and du mps the catcher while sit- ting in the seat. T wo toggle switches oper ate independent hydraulic cylinders to raise and lowe r the catcher . The back doo r automatically open s and closes during the dump cycle. NOTE: The ignitio[...]

Operating Instructions 55 Power Dump Components Grass Catcher Cable Guide Catcher Door Fork Lift Ch annel Gas Sp r i n g Rubber Bumper Power Dump Ram Actuator Dog Leg Assembly Actuator Mount Assembly Cable Assembly Catcher Door Gas S pring Upper Arm Lower Arm Door Arm Actuator[...]

Operating Instructions 56 Grass Catcher Cable Guide Cable Assembly Lift Channel Lift Cylinder Reservoir/Power Unit Dump T oggle Switch Lift T oggle Switch Control Lift Rod Control Lift Rod Safety Lockout Arm Gas S pring Assembly Catcher Pivot Arm Dump Cylinder Hydraulic Va l v e s Coil with Connectors Hydraulic Va l v e B o x Catcher Door Gas S pri[...]

Maintenance Instructions 57 MAINTENANCE SCHEDULE CHART - RE COMMENDED SERVICE INTERV ALS - MODEL MT , MT L, MTEFI, MTLEFI Service Item Daily 25 Hours 100 Hours 200 Hours Y early Every 2 Y ears Ref. Page Check Engine Crankcase Oil Level x 59 Check/Clean Engine Air Cooling System* x 68 Check Coolant Level, Radiator/O verflow T ank (MTL) x 72 Clean Ra[...]

Maintenance Instructions KOHLER T IP S 58 IMPORT ANT TIPS FOR CARE OF THE KOHLER ENGINE Fuel System  Fuel must be cle an - free from water , dir t, and or- ganic material.  Change fuel filter on a regular basis and wh en contamin ation is suspected or found in th e fuel.  On the Model MTEFI, the fuel syst em is pressur- ized. Do not attemp[...]

Maintenance Instructions KOHLER TIPS/LUBRICA TION 59 Oil  Use only multi-viscosity oils as specified with the viscosity matching ambient tempera tures for the en- gine operating conditions. This will aid starting in cold weather and assure pr oper lubrication in hot weather .  Use only Kohler oil filters. Af termarket filters may not seal pro[...]

Maintenance Instructions LUBRICATION 60 Changing Engine Cran kcase Oil/Oil Filter For Model MT and MTEF I, change the engin e crank- case oil af t er every 100 hour s o f operation and re- place the oil filt er every other o il change ( every 200 hours of operation). For Model MTL, change the engine crankcase oil af - ter every 200 hours of op erat[...]

Maintenance Instructions LUBRICATION 61 Mower Deck Ge arboxes (Shown with Gearbox Cover Removed for Clarity) 2. Clean the area ar ound the indi vidual gearbox cover plates to prevent contamina nts from en- tering the gearca se . 3. Remove t he screws se curing the cover plates on the blade drive gearb oxes. 4. Check the le vel of lubricant in th e [...]

Maintenance Instructions LUBRICATION 62 T ractor PTO Gearbox Lubrication Checking Ge arbox Oil Leve l Check the gearbox oil leve l every 25 hours, and if necessary , add oil [SAE E. P . (Extreme Pressure) 80W-9 0 (API GL-5) gear lube] to maintain oil level to the FULL mark on the dipstick. IMPORT ANT : DO N OT overfill the PT O gearbox to avoid oil[...]

Maintenance Instructions LUBRICATION 63 Hydrost atic T ransmission Fluid Checking Hydrostatic T ransmission Fluid Level The hydrost atic transmissions are sealed unit s and do not need to be open ed to check th e fluid level. Hydrostatic fluid leve l should be checke d ev- ery 25 hours of machine opera tion. It is pr efer able to check the fluid wh[...]

Maintenance Instructions LUBRICATION 64 Ident Lubrication No. No. Location T ype Places Ident Lubrication No. No. Location T ype Places 1 Deck Caster Wheel Fork Pivot Grease 2 2 Deck Caster Wheel Bearing Grease 2 3 T ee Gearbox, Deck Oil * 1 4 Blade Drive Gearbox Oil * 2 5 Universal Joint Shaft Assembly Grease ** 1 6 Pivot Assembly , T ilt-Up Deck [...]

Maintenance Instructions LUBRICATION 65 Chassis and Dec k Lub r ic at ion Poin ts 2 2 3 11 5 4 4 7 7 8 8 6 6 6 6 10 11 9 13 13 12 15 16 14 14 18 19 19 17 21 & 36 22 22 21 24 25 23 27 27 26 29 30 30 & 35 28 32 33 31 34 34 20[...]

Maintenance Instructions CLEANING 66 CLEANING Engine Air Cleaner System There are two main compon ents in the engine air cleaner system: a turbine precleaner and a Donald- son Radialseal™ air clean er . Each component is checked, cleaned a nd mainta ined on a dif ferent schedule based on the f iltering action required. Each component is serviced [...]

Maintenance Instructions CLEANING 67 Donaldson R adialseal™ Air Cle aner A remote mounted Donaldson Ra dialseal™ air cleaner provides the air filte ring function. The paper filter element slides over an outlet tube inside the air cleaner canister with radial sealing action, re ducing the possibility of dust lea ks due to improper filter install[...]

Maintenance Instructions CLEANING 68 4. Use a bright light inside the element to inspect for damage. Check the element very car efully for pin holes or other damage that will allow dirt to leak throug h the paper media. Replace element if nece ssary . 5. Without removing, visually in spect the conditio n of the safety filter fo r damage or ho les. [...]

Maintenance Instructions CLEANING 69 Cylinder Head Cooling Fins It is essential for performan ce and longevity o f the air-cooled e ngine to keep the cylind er head coolin g fins clean and free of obstructio n. After every 8 hours of operation, che ck the performa nce of the cooling system by starting th e engine, holding a hand adjacent to the cyl[...]

Maintenance Instructions CLEANING 70 Flushing Radiator and Changing Coolant Change engine coolan t every year . Drain the cool- ant from the engine and radiator: 1. Remove the radiator cap. 2. Open the drain cocks on the engine block and radiator (see the Kohle r Owne r's Manual for lo- cation of the drain cocks). Also, drain the cool- ant rec[...]

Maintenance Instructions CLEANING 71 GHS Blower Normally , the GH S blower oper ates with no mainte- nance or cleaning. However , when mowing grass that is dir ty and damp (especially springtime mow- ing), a deposit of dirt may accumu late inside the blower housing, causing wear and binding of the blower wheel. When operating in thes e conditions, [...]

72 Maintenance Instructions CLEANING/ CHECKING/SERVICING An additional pr ocedure in maintaining transmission cooling is to inspect the cooling fans. Replace the fan(s) if blades are missing or damaged. Hydrost atic T ransmission Cooling Fins CHECKING/SERVICING Engine Cooling System - MTL an d MTLEFI Coolant Level Model MTL Overflow T ank Check the[...]

73 Maintenance Instructions CHECKING/SERVICING Battery NOTE: For initial battery serv ice during setup, re- fer to Battery Service in Assembly Instructions . IMPORT ANT : Make sure battery is securely mount- ed in the frame. A loo se battery ma y cause damage to the case r esulting in acid leakage and severe dam- age to the mach ine. A hazard may b[...]

74 Maintenance Instructions CHECKING/SERVICING Tire Pressure Inflate tires to pressures shown below: Deck Caster Wheel = 20 PSI (137 kPa) Drive = 15 PSI (103 kPa) Rear = 20 PSI (137 kPa) Wheel Bolt T o rque Every 100 hours check the eigh t (8) lug bolt s that mount the driv e t ires. They sh ou ld be to rq ue d to 75 to 85 ft-lbs (101.7 to 1 15.2 N[...]

Maintenance Instructions CHECKING/SERVICING 75 6. Check blade balance by po sitioning the blade horizontally on a blade balancer or u se a nail or shaft th rough the center hole. If eithe r end of the blade rotates down ward, grind (rem ove) metal on that end until the blade will balance. The blade is p roperly balanced when neither end drop s. Bal[...]

76 Maintenance Instructions CHECKING/SERVICING Radiator Hoses and Clamp s - MTL and MTLEFI Inspect the radiator hoses ever y 200 hours for de- terioration or damage. Also check the tightness of the hose clamps. Good preven tive maintenance calls for complete replacement of the radiato r hos- es and clamps every two (2) years. Blade Brake Action Che[...]

Maintenance Instructions REPLACING/REP A IRING 77 REPLACING/REP AIRING IMPORT ANT : AL W A YS use genuine factory re- placement part s. Substitute parts CAN result in product malfunction and possible in jury to the oper- ator and/ or others . Drive Belt s There are four (4) individual belt s on GHS models or three (3) belts on SD models:  Jacksh[...]

Maintenance Instructions REPLACING/REP A IRING 78 Engine P TO Dr ive Belt (3 Groove Powe r Band) 1. T o remove th e en gin e PTO drive belt: a. Remove the jackshaft drive belt from its idler pulley (by pushin g down on idler pul- ley) and let the belt drop down out of the way . NOTE: S te p (a) is not essential to re moving the P TO b elt, but it m[...]

Maintenance Instructions REPLACING/REP A IRING 79 Jackshaft Drive Belt 1. T o remov e the jacksh aft drive belt: a. Remove the engine P TO drive belt, as described in previou s section. Jackshaf t Drive Belt (Engaged) Jackshaf t Drive Belt (Disengaged) Idler Pulley T ension S pring Jackshaft Drive Belt Push Idler Pulley Down to Relax Belt Jackshaft[...]

Maintenance Instructions REPLACING/REP A IRING 80 GHS Blower Drive Belt 1. Remove the GHS blower drive belt tensio n by depressing the idler pulley on the tightene r arm. Roll the belt off the blower pulley and remove. Blower Drive Pulley Depress Idler Pulley Down to Rela x Belt Belt T ightener Idler Pulley (Disengaged) Blower Pulley GHS Blower Dri[...]

Maintenance Instructions REPLACING/REP A IRING 81 Hydrostatic Grou nd Drive Belt 1. T o remove the hydrostatic grou nd drive belt: a. Raise the spring-loaded belt tightener arm and idler pulley to relax belt. b. Slide belt off pulle ys, then release the idler . Hydrostatic Ground Drive Belt Idler Pulley Belt T ightener Arm Jackshaft T ransmission D[...]

Maintenance Instructions REPLACING/REP A IRING 82 Fuel Filter - Model MT and MTL Models MT an d MT L ar e each equ ipped with an in- line fuel filter . Visually in spect the filter periodically , and replace the filter yearly . Fuel Filter Location IMPORT ANT : Replace the fuel filter only in a clean area where the fuel line and connections will no[...]

Maintenance Instructions REPLACING/REP A IRING 83 Blade Overload Shear Bolt s NOTE: Shear bolts ar e not used on the DSD52 or DSD62 mower deck. The cutting bl ade is keyed to the bl ade hub by two (2) shear bol t s (10-24 x 5/8 in. stainless steel ma- chine screws). These bolt s are designed to shear and protect the blade d rive gearbox from d amag[...]

84 Maintenance Instructions REPLACING/REP A IRING Mower Blades Mower blades are r emoved and remounted as de- scribed in Sharpen Mower Bla des instructions. During the cour se of sharpening and inspecting mower blades, if th ere are any of the f ollowing conditions of wear or damage, blades should be replaced for reasons of safety and performance o[...]

Maintenance Instructions ADJUSTMENTS 85 ADJUSTMENTS Steering Levers An adjustmen t range of ap proximately 3 in. (76 mm) is available on the steering levers - the levers ca n be adjusted forward or aft depend ing on the arm len gth of the operato r . The levers can be adjusted by loos - ening the locknut at the pivot point and the locknut holding t[...]

Maintenance Instructions ADJUSTMENTS 86 GHS Signal Horn Adjustment (When Horn Sounds at W rong T ime) The vertical pos ition of the Gra ss-Pak ® switch is c rit- ical to make sure the catcher box does not overfill causing the delivery chute to c log. Th e vertic al po- sition can be adjusted by bending the moun ting bracket for the Grass-Pak ® sw[...]

87 LIMITED W ARRANTY FOR WA L K E R COMMERCIAL RIDER MOWER 1. WHA T THIS W ARRANTY COVERS, AN D FOR HOW LONG: W alker Manufacturing company will, at its option, rep air or replace, without charge, any part covered by this warranty which is found to be defective in material and/or workmanship wi thin one (1) year* after date of sale to the original [...]

TM W ALKER MFG . CO.  5925 E. HARMONY ROAD, FORT COLLINS, CO 80528  (970) 221-5614 FORM NO. 080909 PRINTED IN USA w ww .walkermowers.com © 2009 W ALKER MFG . CO Sound - Model MT Sound T est Sound test conducted was in accordance with Council Directive 2000/14/EEC and was performed on 28 February 06 under the conditions listed: General Condit[...]