Maintenance Instructions LUBRICATION46Mower 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).Tractor PTO Gearbox LubricationThe tractor PTO gearbox is permanently lubricated(oil filled) and sealed requiring no scheduled lubrica-tion. However, the gearbox oil seals should bechecked every 25 hours for indication of oil leaks. Ifevidence of an oil leak is noted, replace the oil sealand relubricate the gearbox. The gearbox will needto be removed from the tractor to be serviced. Refillwith SAE E.P. (extreme pressure) 90W oil until oillevel is up to (submerges) horizontal shaft of gearbox(shaft parallel to cover). DO NOT overfill.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.Tractor PTO GearboxBlade DriveGearboxesTeeGearboxPTOGearbox