Reassembly Of Oil Pump - Yanmar 3TNV82A-B Service Manual

Trochoid Oil Pump
Check Rotor Shaft Clearance
Determine the rotor shaft clearance. Measure the
outside diameter of the rotor shaft
(Figure 9-28, (1)) and the bore diameter in the gear
case housing (Figure 9-28, (2)).
Calculate the difference between the two
measurements to determine the clearance.
Figure 9-28
Record the measurement(s) and see Rotor Shaft
Clearance <Trochoid type 3TNV82A-B - 4TNV88-B,
4TNV94L - 4TNV106T> on page 9-7 for the service
limits.

Reassembly of Oil Pump

1. Lubricate the outer rotor and pump bore in the
gear case with clean engine oil.
2. Reinstall the outer rotor in the gear case
housing. The punch mark (Figure 9-29, (1)) on
the end of the outer rotor must face away from
the gear case housing (Figure 9-29, (2)).
1
Figure 9-29
TNV DI Service Manual
(1)
(2)
0000047A
2
0000048A
LUBRICATION SYSTEM
3. Reinstall the oil pump assembly
(Figure 9-30, (1)) into the gear case housing
(Figure 9-30, 2). Tighten the bolts to specified
torque.
(2)
Figure 9-30
4. Reinstall the gear case cover and crankshaft
pulley. See Installation of Gear Case Cover on
page 6-97.
5. Reinstall the engine coolant pump V-pulley
(Figure 9-31, (1)), spacer (Figure 9-31, (2)),
engine cooling fan (Figure 9-31, (3)) and
engine cooling fan guard (if equipped).
(1)
Figure 9-31
6. Reinstall the V-belt. Tighten the V-belt to the
proper tension as described in Check and
Adjust Cooling Fan V-Belt on page 5-22.
(1)
0000049D
(3)
(2)
0000163C
9-19