Walker MDD (20.9 HP) Owner's Manual

Also see for MDD: Owner's manual Owner's manual

Contents

63Maintenance Instructions CHECKING/SERVICINGNOTE: Blades can be sharpened with an elec-tric blade sharpener, conventional electric grind-er, or a hand file.Mower Blade Profile For Sharpening6. 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 the five(5) belts (4 belts on SD models) every 25 hours ofoperation - engine PTO drive, jackshaft drive, hydro-static ground drive, GHS blower drive, and enginefan belt. If the belts show signs of cracking or de-teriorating, the belts should be replaced. Refer toREPLACING/REPAIRING the Drive Belts in thissection.Mower Deck Gearbox Oil SealsThe mower deck gearbox seals should be inspectedevery 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 theblade hub and seal protector plate on the housing,but is still vulnerable to seal damage due to operat-ing in an adverse environment. The mower blademust be removed for inspection of the seal, so it isrecommended to inspect the gearbox seals whenblades are removed for sharpening. If an oil leakis noted, the seal should be replaced and the gear-box assembly relubricated. Refer to Mower DeckGearbox Lubrication in this section.CAUTIONALWAYS wear eye protection and gloveswhen sharpening a blade.30°Do Not Grind orSharpen on UndersideSharpen atOriginal 30° AngleIntersectionWear AreaWingTipBlade Balancer