Disassembly Of Oil Pump; Cleaning And Inspection - Yanmar 3TNV82A-B Service Manual

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 cooling water fan guard (if equipped),
cooling fan (Figure 9-15, (3)), spacer
(Figure 9-15, (2)), cooling water pump V-pulley
(Figure 9-15, (1)), and V-belt.
(1)
Figure 9-15
1. Remove the crank shaft pulley and gear case
cover. See Removal of Timing Gear Case
Cover on page 6-73.
2. Remove the lubricating oil pump assembly
mounting bolts. Remove the lubricating oil
pump assembly (Figure 9-16, (1)) from the
gear case flange (Figure 9-16, (2)).
3. You can remove by hand the lubricating oil
pump cover (Figure 9-14, (5)) and outer rotor
(Figure 9-14, (4)).
9-14
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(3)
(2)
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(2)
Figure 9-16

Cleaning and inspection

Clean the lubricating oil pump, pressure regulator
valve (Figure 9-14, (7)), and rotor inserting portion.
Check the parts for wear or flaw. Replace the parts
with new ones as needed.
CAUTION
• NEVER overfill the engine with engine
oil.
• ALWAYS keep the oil level between the
upper and lower lines on the oil
cap / dipstick.
Check Outer Rotor Outside Clearance
Inspect the outside diameter clearance of the outer
rotor. To inspect this, insert a feeler gauge between
the outer rotor (Figure 9-17, (1)) and the lubricating
oil pump body (Figure 9-17, (2)).
TNV DI Service Manual
Trochoid Oil Pump
(1)
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