Service Manual

LUBRICATION SYSTEM 6-9
Oil Pump, Relief Valve
Oil Pump, Relief Valve Removal
•
Remove:
Crankcase Cover (see Crankcase Cover Removal in the
Camshaft/Crankshaft chapter)
Governor Shaft (see Governor Shaft Removal in the Fuel
System chapter)
Bolts [A]
Pump Cover Plate [B]
•
Remove:
Inner Rotor [A]
Outer Rotor [B]
Spring [C]
Relief Valve Ball [D]
Oil Pump, Relief Valve Installation
•
Fill the rotor housing with engine oil for initial lubrication.
•
Install the outer [A] and inner rotor [B].
○
Align the inner rotor groove [C] to the center of the
crankcase cover as shown in the figure.
•
Install the relief valve ball and spring in position.
•
Install the pump cover plate.
•
Tighten:
Torque - Oil Pump Cover Plate Bolts: 5.9 N·m (0.60 kgf·m,
52 in·lb)
Oil Pump, Relief Valve Inspection
•
Remove the pump cover plate (see Oil Pump, Relief Valve
Removal).
•
Visually inspect the pump gear, outer and inner rotor, and
cover plate.
If there is any damage or uneven wear, replace them with
new ones.
○
Check the clearance [A] between the inner and outer rotor
with a feeler gauge. Measure the clearance between the
high point of the inner rotor and the high point of the outer
rotor.
If the measurement exceed the service limit, replace the
rotors as a set with new ones.
Inner and Outer Rotor Clearance
Service Limit: 0.2 mm (0.008 in.)