Removing
1. Remove the front cover, which is the oil pump housing.
2. Remove the crankshaft seal from the cover.
3. Remove the oil pump cover.
4. Remove the pressure reducing valve.
Examination
1. Install the gear rings in the pump casing and measure the gap between the drive gear ring and the pump casing.
2. Measure the gap between the driving and driven gear rings.
3. Measure the gap between the gear ring plane and the pump casing plane.
4. Measure the length of the pressure reducing valve spring, replace the spring if necessary.
5. Lubricate the new seal with oil and install.
6. Lubricate the piston of the pressure reducing valve with engine oil and install the valve in the pump housing.
7. Lubricate the gear rings and install in the casing.
8. Install the pump cover and tighten the bolts.
Installation
1. Install the front cover and tighten the bolts.
2. Install the remaining parts.