Maintenance Instructions LUBRICATION43Changing Engine Crankcase Oil/Oil FilterChange the engine crankcase oil after every 50hours of operation and the oil filter after every 100hours of operation as follows:1. Park the mower on a level surface with theengine stopped. The engine oil should bewarm before draining. If not warm from opera-tion, start the engine and run a few minutes towarm the oil.2. Before removing the dipstick, clean the areaaround it to keep any dirt or debris out of theengine.3. Remove the dipstick and oil drain plug, and drainoil into a suitable container. Be sure to allowample time for complete drainage.4. Before removing the oil filter, clean the areaaround the filter to keep dirt and debris out of theengine.5. Remove the old oil filter and wipe off the filtermounting surface on the engine.Oil Drain, Dipstick (Oil Fill),and Oil Filter Locations(view from lower left side of tractor)6. Apply a thin coating of new oil to the rubber gas-ket on the replacement oil filter.IMPORTANT: Use ONLY oil filters from theengine manufacturer. Aftermarket oil filters maynot seal properly and/or may not have the cor-rect pressure relief valve for proper lubrication.7. Install the new oil filter on the engine. Turn theoil filter clockwise until the rubber gasket con-tacts the sealing surface, then tighten the filteran additional 3/4 turn.8. Reinstall the drain plug. Make sure it is tight-ened to 16.5 ft-lb (23 N · m).9. Fill the crankcase (through the dipstick opening)with oil using only crankcase lubricants suppliedby the engine manufacturer. Refer to Specifica-tions in this manual or the engine owner’smanual. Use the recommended oil viscosity forthe expected ambient temperature. Oil with thecorrect viscosity will aid starting in cold weatherand assure proper lubrication in hot weather.Fill to FULL (H) mark on the dipstick; crankcasecapacity is 2.7 pints (1.3 liters).IMPORTANT: Check the dipstick reading be-fore pouring in the last 1/2 pint of oil and fill onlyto the FULL (H) mark. The oil level shouldnever be over the FULL (H) mark on the dipstick;overfilling can result in engine overheating andloss of power.10. Start the engine and check for oil leaks aroundthe oil filter. Stop the engine, recheck the oil lev-el, and add oil if necessary. (When the engineis first operated with a new oil filter, the oil levelwill drop slightly as the filter is filled with oil.)Grease Fitting and Oil Point LubricationLubricate the grease fittings and oil points afterevery 25 hours of operation. Lubricate more oftenwhen operating in dusty or dirty conditions. UseSAE general purpose lithium or molybdenum basegrease for grease fittings and light machine oil (SAE10) to lubricate oil points. Lubricate the locationsshown in the Chassis and Deck LubricationPoints illustration.NOTE: PTO universal joints (on the deck and trac-tor) require routine lubrication after every 8 hours ofrunning time.NOTE: The pillowblock bearings on the PTO driveshaft are a sealed, relubricatable-type bearing.Grease lightly once per year using care to notover-lubricate and damage the seals.Oil FilterDipstick(Oil Fill)Oil Drain