4. LUBRICATION SYSTEM ATV 50 OIL PUMP INSTALLATION · Lubricate the O-ring with grease or engine oil before installation. · Make sure that the oil pump is inserted into the crankcase. · Apply molybdenum disulfide or grease to the pump pinion. Bolts Grease or Engine Oil Install the oil pump onto the crankcase. Nut Oil Outlet Line Install the oil pump control cable plate. Connect the oil inlet line and oil outlet line properly. Oil Pump Driven Gear Connect the oil pump control cable. Bleed air from the oil pump. Oil Inlet Line Control Cable 4-4