Yanmar 4BY, Service Manual

Page: 195 / 275

LUBRICATION
8-14
BY Service Manual
Repair
Remove and Install Oil Cooler
IMPORTANT
When working on the oil, coolant or fuel
circuits you must protect the alternator from
contamination. Cover alternator with
suitable materials.
Failure to comply may result in an alternator
failure.
1. Drain engine coolant. See Draining and Filling
Closed Cooling System on page 7-12.
2. Remove oil filter element. See Replace Engine
Oil and Engine Oil Filter Element on page 8-12.
Figure 8-8
3. Remove coolant pipe retaining bolt
(Figure 8-8, (1)) .
4. Disconnect coolant pipe (Figure 8-8, (2)) from
thermostat housing.
Figure 8-9
5. Disconnect coolant pipe hose (Figure 8-9, (1))
from oil cooler.
6. Remove three screws (Figure 8-9, (2)) and
remove oil cooler (Figure 8-9, (3)) .
Figure 8-10
7. Inspect ports for evidence of blockage or
corrosion (Figure 8-10) . Clean or replace oil
cooler as necessary.
8. Thoroughly clean sealing surfaces.
000 3 766
(1)
(2)
000 3 790
(2)
(2)
(1)
(
3
)
000 3 792