Yanmar 4BY - Oil Pump

LUBRICATION
BY Service Manual
8-17
Repair
8. If removed, install oil drain plug and tighten to
25 N·m (221 in.-lb).
9. Fill engine with clean engine oil.
10. Run engine and check for leaks.
11. Check oil level and add as necessary.
Oil Pump
The oil pump contains no serviceable parts. If the
oil pump is damaged, it must be replaced as an
assembly.
Removal of Oil Pump
1. Drain oil from oil sump.
2. Remove oil sump. See Remove and Install Oil
Sump on page 8-16.
Figure 8-17
3. Remove bolts (Figure 8-17, (1, 2)). Remove oil
strainer assembly and suction pipe.
4. Remove bolts securing oil pump
(Figure 8-17, (3)). Remove oil pump from
engine.
Installation of Oil Pump
1. Install oil pump assembly. Ensure drive chain is
properly engaged on sprocket
2. Secure oil pickup to oil deflector and oil pump
with new gasket. Tighten bolts to 10 N·m
(89 in.-lb).
3. Install oil sump. See Remove and Install Oil
Sump on page 8-16.
4. Fill crankcase to proper level with new engine
oil.
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