Cleaning And Inspection - Yanmar 3TNV82A-B Service Manual

Trochoid Oil Pump
6. Remove the oil pressure regulator valve
(Figure 9-7, (1)) from the oil pump cover
(Figure 9-7, (2)).
(1)
Figure 9-7

Cleaning and Inspection

Wash the oil pump cover, the oil pressure regulator
valve, the oil pump cavity and the inner and outer
rotors. Inspect the parts for wear or damage.
Replace as necessary.
Note: If the oil pump cavity is damaged, the
gear case cover must be replaced.
A
CAUTION
If any oil pump component clearance
exceeds its limit, the oil pump must be
replaced as an assembly.
Check Outer Rotor Outside Clearance
1. Reinstall the outer and inner rotors. The dots on
the rotor faces must face "up." Make sure that
the pilot on the back of the inner rotor fits into
the bore of the oil pump cavity and the top
surface of the inner rotor is flush with the top
surface of the outer rotor.
2. Determine the outside clearance of the outer
rotor. Insert a feeler gauge between the outer
rotor (Figure 9-8, (1)) and the gear case oil
pump cavity (Figure 9-8, (2)).
TNV DI Service Manual
Record the measurement(s) and see Outer
Rotor Outside Clearance on page 9-6 for the
service limits.
(2)
0001642
Outer Rotor to Inner Rotor Tip Clearance
Determine the outer rotor to inner rotor tip
clearance. Insert a feeler gauge between the top of
an inner rotor tooth (Figure 9-9, (1)) and the top of
an outer rotor tooth (Figure 9-9, (2)) and measure
the clearance.
0000015en
Record the measurement(s) and see Outer Rotor
to Inner Rotor Tip Clearance on page 9-6 for the
service limits.
LUBRICATION SYSTEM
(2)
Figure 9-8
(1)
Figure 9-9
(1)
0001151A
(2)
0001150A
9-11