1999-2002 TRX400EX Fourtrax Service Manual, Page 44Get this manual

1999-2002 TRX400EX Fourtrax Service Manual, Page 44

MAINTENANCE At CrankcaseOil Check Bolt NOTE The crankcase oil level check bolt is useful when checking the lubrication; the oil pump adjusts the level so that the crankcase is always kept the proper levelIf this check shows otherwise, some portion of the lubrication system is not working properly Do not check the oil level immediately after the engine has been operated at high speedsMake sure that vehicle is on firm level ground while idlingAllow the engine to idle for few minutes to stabilize the oil levelsThe crankcase oil level is correct if the oil is flush with the bottom of the check bolt hole OIL CHECK SOLT AND SEALING WASHER

OIL CHANGE
CAUTION:

Used engine oil may cause skin cancer if repeatedly left in contact with the skin for prolonged periodsAlthough this is unlikely unless you handle used oil on daily basis, it is still advisable to thoroughly wash your hands with soap and water as soon as possible after handling used oilNOTE: Change the oil with the engine warm to assure complete and rapid draininoStart the engine and let it idle for few minutesStop the engine and remove the oil filler capldipstickRemove the oil tank and crankcase drain bolts with the sealing washers and drain the engine oilAfter the oil has drained, install the drain bolts with new sealing washers