Walker MB (18 HP) Owner's Manual

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Contents

Walker MB (18 HP) Owner's Manual Manual pdf 42 page image

Maintenance Instructions LUBRICATION40Mower Deck Gearbox LubricationThe mower deck gearboxes (tee gearbox and bladedrive gearboxes) are connected as a unitizedassembly, and oil flows freely between them. Thegearboxes are permanently lubricated (oil filled) andsealed requiring no scheduled lubrication. However,the gearbox oil seals should be checked every 25hours for indication of an oil leak; particularly thelower seals on the blade drive gearboxes should beinspected, since they operate in a dirty environment.If an oil leak is noted, replace the oil seal and relu-bricate the gearbox assembly as follows:1. Remove gearbox cover (footrest). Deck orien-tation should be the normal operating position.Mower Deck Gearboxes(shown with gearbox cover removed for clarity)2. Clean the area around the individual gearboxcover plates to prevent contaminants fromentering the gearcase.3. Remove the screws securing the cover plateson the blade drive gearboxes.4. Check the level of lubricant in the gearboxes. Ifthe lubricant is low, add SAE E.P. (ExtremePressure) 90W oil until the oil level is up to (sub-merges) the horizontal shaft in the gearbox(shaft parallel to cover plate).NOTE: In case the gearboxes are completelydrained of oil, approximately 5 fl. oz. (15 cl) of oilper gearbox is required to refill the gear driveassembly.NOTE: Since the gearboxes are connected asa unit by connector tubes, it is necessary to addoil slowly. Allow a few minutes after adding oilfor the oil to flow throughout the assembly andthe oil level to stabilize before reassembly.IMPORTANT: DO NOT overfill the deck gear-boxes. The gearbox assembly is not vented,and overfilling with oil will cause excessive pres-sure and result in oil leaks.5. Check condition of the cover gasket and replaceif worn or damaged. Reinstall gearbox coverplates; torque screws to 24 in-lb (2.7 N · m).Transaxle Lubrication• The transaxle oil lubrication is SAE 20W-50 en-gine oil.• Inspect both transaxle cases and hoses after ev-ery 100 hours of operation for visible leaks.• The fluid levels for each transaxle can bechecked visually by looking at the fluid levels in eachexpansion reservoir. When the transaxles are cold,the fluid level in the expansion reservoirs should bebetween 1/4" and 1/2" (.64 cm and 1.27 cm).Expansion Reservoir LocationBlade DriveGearboxesTeeGearboxReservoir CapHot LevelCold Level