4. LUBRICATION SYSTEM MXU 500 IRS Oil Pump Shaft OIL PUMP DISASSEMBLY/INSPECTION/ ASSEMBLY DISASSEMBLY Remove the oil pump shaft. Oil Pump Cover Remove the screw and oil pump cover. Screw Oil Pump Body Dowel Pin Inner Rotor Remove the dowel pin, oil pump outer rotor and inner rotor. Outer Rotor 4-9