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 REPLACING/REPAIRING79Reinstall the blades following procedure inCHECKING/SERVICING for Sharpen MowerBlades instructions. If blades are replaced, alwaysuse Walker original equipment blades to ensuresafety and optimum performance. The quality andperformance of replacement blades offered byother manufacturers cannot be guaranteed, theycould 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 inCHECKING/SERVICING for Sharpen MowerBlade 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.7. Install the new gearbox on the spline couplingof the drive shaft. Establish correct timing ofthe blade drive gearboxes by setting flats onthe output shaft at 90 degrees when connectingthe gearbox(es) to the spline coupling. Makesure the timing is correct before proceedingwith assembly.8. Reinstall the four (4) bolts mounting the gearboxto the connector tube but do not tighten themat this time; leave connector tube bolts finger-tight.9. Position the gear drive assembly on the deckand install the 3/8-16 bolts mounting the entireassembly. Leave the mount bolts finger-tight.10. Torque all the connector tube bolts to 80 in-lb(9 N⋅m); then tighten the deck mount bolts.NOTE: This fastener tightening sequence alignsthe gearbox assembly with the deck housing andeliminates the possibility of mounting the unitizedassembly in a bind.11. Fill gearbox assembly with oil. Refer to LUBRI-CATION for Mower Deck Gearbox Lubrica-tion in this section for instructions.12. Reassemble remaining items onto deck to com-plete installation. After installing blades, checkthat the blade timing is correct by moving theblades through one (1) complete revolution.Make sure blade tips pass clear of each other.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.