Walker MW 15 HP Owner's Manual

Contents

Walker MW 15 HP Owner's Manual Manual pdf 46 page image

Maintenance Instructions REPLACING/REPAIRING42• An excessive amount of the flat section of theblade has been ground away (removed) when theblade is sharpened. Replace the blade when lessthan a 3/4 in. (19 mm) flat section remains at theblade tip.• Examine ends of the blade carefully, especiallythe intersection where the flat section of the bladeturns up to form the “wing tip” (refer to Mower BladeProfile for Sharpening illustration in SharpenMower Blades instructions). Since sand and abra-sive material can wear metal away in this area, theblade should be replaced when metal thicknesshas worn to 1/16 in. (1.6 mm) or less.• Check the blades for straightness by markingblade tip position inside the deck housing and thenrotating the opposite end of the blade to the sameposition and comparing. If the difference in blade tiptrack is more than 1/8 in. (3 mm), the blade is bentand should be replaced.• Inspect the blade surface, especially in formedareas, for cracks. Replace the blade if any cracksare found.Reinstall the blades following procedure fromSharpen Mower Blades instructions. If blades arereplaced, always use Walker original equipmentblades to ensure safety and optimum performance.The quality and performance of replacementblades offered by other manufacturers cannot beguaranteed, they could be dangerous.Mower Deck Gearbox ReplacementNOTE: Deck gearbox(es) may be changed withthe deck mounted on the tractor. However, the deckmay be removed from the tractor making the overalljob of removing the gearbox assembly easier. Referto Deck Installation in Assembly Instructions and re-verse the procedure to remove the deck.To replace the mower deck gearbox(es), use the fol-lowing procedure:1. Remove mower blades. Refer to procedure inSharpen Mower Blade instructions.2. Remove gearbox cover (two machine screws)and PTO shaft guard (two 1/4-20 bolts).3. Remove two (2) 3/8-16 mounting bolts fromeach blade drive gearbox and lift the entiregearbox assembly from the deck (includingPTO drive shaft).4. Remove the screws securing the cover plateson the gearboxes and remove the covers. Re-move all covers to be sure oil is completelydrained from all gearboxes.NOTE: With oil flow throughout the unitizedgear drive assembly; if one gearbox has internaldamage or excessive wear, the remaining gear-boxes and connector tubes should be complete-ly disassembled and thoroughly flushed out withsolvent before reassembly.5. Drain and properly dispose of oil.6. Remove the four (4) bolts mounting the gearboxto the connector tube and slide the gearbox offthe splined drive shaft coupling.DANGERWhen blades are operated over sandysoil, and if blades are allowed to wear, a“slot” may be worn into the wing tip ofblade. Eventually a piece of the blade maybreak off creating a serious potential forinjury or damage.WARNINGDO NOT try to straighten a blade that isbent. NEVER weld a broken or crackedblade. ALWAYS replace with a new bladeto assure safety.CAUTIONALWAYS use genuine factory replacementparts. Substitute parts CAN result in prod-uct malfunction and possible injury to theoperator.