Trochoid Oil Pump; Disassembly Of Oil Pump - Yanmar 3TNV82A-B Service Manual

Trochoid Oil Pump

TROCHOID OIL PUMP
4TNV94L/98/106
Components
The oil pump on these model engines is located in
the front gear case and is driven by the same gear
train that drives the camshaft and fuel injection
pump. You must remove the front gear case cover
to gain access to the oil pump.
(2)
(5)
1 – Gear Case Housing
2 – Outer Rotor
3 – Inner Rotor
4 – Cover Plate
5 – Drive Gear
Figure 9-22
TNV DI Service Manual
Oil Pump
(1)
(3)
(4)
0000043A
LUBRICATION SYSTEM

Disassembly of Oil Pump

CAUTION
If the oil pump must be replaced, replace
it as an assembly only. Do not replace
individual components.
Remove the engine cooling fan guard (if equipped),
engine cooling fan (Figure 9-23, (3)), spacer
(Figure 9-23, (2)), engine coolant pump V-pulley
(Figure 9-23, (1)) and V-belt.
(1)
Figure 9-23
1. Remove the crankshaft pulley and the gear
case cover. See Removal of Timing Gear Case
Cover on page 6-73.
2. Remove the oil pump assembly bolts. Remove
the oil pump assembly (Figure 9-24, (1)) from
the gear case housing (Figure 9-24, (2)).
0000030en
(3)
(2)
0000163C
9-17