Lubrication System/Oil Pump DISASSEMBLE AND INSPECT OIL PUMP 1. Inspect oil pump gear (A) for chipped or broken teeth. If gear is damaged, replace oil pump assembly. 2. Inspect suction tube (B) for cracks, plugged suction screen, or damage. If necessary, remove suction tube using locking pliers. M36422 -UN-29JAN90 M98,2040K,12 -19-11OCT85 3. Remove two cap screws to remove oil pump housing and gasket (A). 4. Measure original gasket thickness. New gasket must be the same thickness as original gasket. M36423 -UN-29JAN90 M98,2040K,13 -19-11OCT85 CTM2 (19APR90) 40-6 16, 18, 20 & 24HP Onan Engines AllTractorManuals.com 130495 5. Inspect gears (A) for chipped or broken teeth, scoring, and wear. 6.
Inspect housing (B) for cracks, wear or damage. If gears or housing are damaged, replace oil pump assembly. -UN-29JAN90 M36424 M98,2040K,14 -19-11OCT85 40 6