Walker MT, MTL, MTEFI, MTLEFI Owner's Manual

Also see for MT, MTL, MTEFI, MTLEFI: Detailed instructions Owner's manual Owner's manual

Contents

Maintenance Instructions CHECKING/SERVICING736. Check blade balance by positioning the bladehorizontally on a blade balancer or use a nailor shaft through the center hole. If either end ofthe blade rotates downward, grind (remove)metal on that end until the blade willbalance. The blade is properly balanced whenneither end drops. Balance of a blade is gener-ally maintained by removing an equal amount ofmaterial from each end of the blade whensharpening.Blade Balanced on MagneticWall-Mounted Balancer7. Mount the blade with wing tips pointing up intothe housing. Reinstall the blade, washer, lockwasher, 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 beswitched. Check for proper blade rotation before in-stalling blades on the deck. Refer to Blade Rota-tion for GHS Mower Deck illustration shown inClogging Checklist in Operating Instructions forcorrect blade rotation.Drive BeltsRaise the body and inspect the condition of thefour (4) belts (3 belts on SD models) every 25 hoursof operation - engine PTO drive, jackshaft drive, hy-drostatic ground drive, and GHS blower drive. If thebelts show signs of cracking or deteriorating, thebelts should be replaced. Refer to REPLACING/REPAIRING the Drive Belts in this section.Mower Deck Gearbox Oil SealsThe mower deck gearbox seals should be inspect-ed every 25 hours for evidence of oil leaking; par-ticularly the lower oil seal on the blade drivegearbox. This seal is protected by the trash guardon the blade hub and seal protector plate on thehousing, but is still vulnerable to seal damage dueto operating in an adverse environment. The mow-er blade must be removed for inspection of theseal, so it is recommended to inspect the gearboxseals when blades are removed for sharpening.If an oil leak is noted, the seal should be replacedand the gearbox assembly relubricated. Refer toLUBRICATION for Mower Deck Gearbox Lubri-cation in this section.Spark PlugsEvery 200 hours of operation, remove the sparkplugs, inspect, clean, and reset the gap (or replacewith new plugs). Before removing the spark plugs,clean the area around the base of the plugs to keepdirt and debris out of the engine. Clean spark plugswith a wire brush. DO NOT use an abrasive grittype cleaner. If the electrodes are burned short orpitted, replace plugs with Champion® type RC12YC[MT & MTEFI (or equivalent)] or RC14YC [MTL &MTLEFI (or equivalent)]. Check spark plug gap witha wire-type feeler gauge and set the gap at 0.030 in.(.76 mm). Reinstall and tighten to between 18 and22 ft-lb (24.4 to 29.8 N·m).Ignition WiresGood preventive maintenance calls for complete re-placement of spark plug wires every two (2) years.Fuel Lines and ClampsNOTE: The MTEFI system is pressurized andshould be serviced by a Walker dealer or AuthorizedKohler engine service outlet.Every year, inspect the fuel supply line from the tankto engine for deterioration or damage. Also, inspectthe fuel line clamps for tightness. Good preventivemaintenance calls for complete replacement of fuellines and clamps every two (2) years.Blade Balancer