Walker MT Owner's Manual

Contents

Maintenance Instructions REPLACING/REPAIRING70After reinstalling the blade, check blade timing bymoving blades through one (1) complete revolu-tion. Make sure blade tips pass clear of each other.If timing is incorrect, refer to Mower Deck GearboxReplacement in this section.Mower BladesMower blades are removed and remounted as de-scribed in Sharpen Mower Blades instructions.During the course of sharpening and inspectingmower blades, if there are any of the following con-ditions of wear or damage, blades should be re-placed for reasons of safety and performance of themachine:• 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 from Sharp-en Mower Blades instructions. If blades are re-placed, always use Walker original equipmentblades to ensure safety and optimum performance.The quality and performance of replacement bladesoffered by other manufacturers cannot be guar-anteed, 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. RefertoDeck 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.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 replace-ment parts. Substitute parts CAN result inproduct malfunction and possible injuryto the operator.