Walker MB (18 HP) Owner's Manual

Also see for MB: Parts and owners manual Detailed instructions

Contents

Walker MB (18 HP) Owner's Manual Manual pdf 52 page image

50Maintenance Instructions REPLACING/REPAIRING2. Rotate U-joint on shaft to align the shear pin holewith the hole (and shear pin fragment) in theshaft. Use a punch to drive the remaining portionof the old shear pin out.3. Install new shear pin and secure with cotter pin.PTO Shear PinIMPORTANT: Use only Walker P/N 8067-13shear pins for replacement to provide propershock protection -- these pins are hardened toshear under a specific amount of load.4. Reinstall the PTO shaft guard.Before operating the deck, inspect the blade over-load shear bolts and also check blade timing (on geardriven decks) by moving blades through one (1)complete revolution. Make sure blade tips passclear of each other. If timing is incorrect, contact yourWalker Dealer.Mower BladesMower blades are removed and remounted as de-scribed in the 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, especially theintersection where the flat section of the blade turnsup to form the “wing tip” (refer to Mower Blade Pro-file for Sharpening illustration in Sharpen MowerBlades instructions). Since sand and abrasive ma-terial can wear metal away in this area, the bladeshould be replaced when metal thickness hasworn to 1/16 in. (1.6 mm) or less.• Check the blades for straightness by markingblade tip position inside the deck housing and then ro-tating the opposite end of the blade to the same po-sition 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.Cotter PinU-JointTube AssemblyShear PinSplit Spring PinU-JointShaft AssemblySet ScrewDANGERWhen blades are operated over sandy soil,and if blades are allowed to wear, a “slot”may be worn into the wing tip of blade.Eventually a piece of the blade may breakoff creating a serious potential for injury ordamage.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.