Yanmar 2TNV70 - Disassembly of Oil Pump

LUBRICATION SYSTEM
9-8
TNV IDI Service Manual
Trochoid Oil Pump
Disassembly of Oil Pump
NOTICE
If the oil pump must be replaced, replace it as an
assembly only. Do not replace individual
components.
1. Remove the engine cooling fan guard (if
equipped), engine cooling fan (Figure 9-4, (1)),
spacer (Figure 9-4, (2)), engine coolant pump
V-pulley (Figure 9-4, (3)) and V-belt.
Figure 9-4
2. Remove the front crankshaft pulley and gear
case cover. See Removal of Timing Gear Case
Cover on page 6-36.
3. Remove the seven oil pump cover screws
(Figure 9-5, (2)).
Note: The oil pump cover screws are installed
using a liquid thread lock. It may be
necessary to used “localized heat” (small
propane torch) and an impact-type
screwdriver to remove these screws.
Figure 9-5
4. Remove the oil pump cover (Figure 9-5, (1))
from the gear case.
5. Remove the outer rotor (Figure 9-5, (3)) and
inner rotor (Figure 9-5, (4)) from the gear case
cover.
6. Remove the oil pressure regulator valve
(Figure 9-6, (1)) from the oil pump cover
(Figure 9-6, (2)).
Figure 9-6
(1)
(3)
(4)
(2)
0001959B
0001955B
(1)
(2)
(3)
(4)
(1)
(2)
0001958A
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