4. LUBRICATION SYSTEM Mongoose/KXR 90/50 Tighten the screw to secure the pump cover. Screws Make sure that the pump shaft rotates freely without binding. Arrow Mark INSTALLATION Reverse the "OIL PUMP REMOVAL" procedures. Make sure that the pump shaft rotates freely without binding. Install the oil pump with the arrow on the pump body facing up and fill the oil pump with engine oil before installation. Oil Pump Pump Shaft 4-8