LUBRICATION
Oil Cooler Components and Functions
8-10 6LY3 Service Manual
© 2007 Yanmar Marine International
OIL COOLER COMPONENTS
AND FUNCTIONS
The engine oil flows through the oil cooler and is
cooled by the coolant system.
Figure 8-9
Figure 8-9
1 – Aft Oil Cooler Cover
2 – Gasket
3–O-Ring
4 – Gasket
5 – Cooler Core
6–O-Ring
7 – Forward Oil Cooler Cover
Inspecting the Oil Cooler
1. Clean the inside of the seawater tubes with a
nylon brush to prevent scale buildup.
2. If the rubber hose connection or welds are
corroded, repair or replace the cooler.
3. Apply the following water pressures to the
seawater and oil lines to check for any leaks.
Repair or replace the cooler if there are any
leaks.
ROTARY WASTE OIL PUMP
COMPONENTS AND
FUNCTIONS (OPTIONAL)
A rotary waste oil pump (Figure 8-10), used to
pump out waste oil during oil changing, is available
as an option. This is a vane-type pump. Turning the
handle rotates the vanes and pumps out the waste
oil.
Figure 8-10
Figure 8-10
1 – Rubber Hose
Oil Cooler Test Pressure
Oil Circuit 0.8 MPa (116 psi)
Seawater Path 0.3 MPa (44 psi)
0006229
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0006230
0006231
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