Yanmar 1GM User Manual page 181

COOLING SYSTEM
175
SEAWATER PUMP
(2GM, 2GM20, 3GM AND 3GM30 MODELS)
13. Cam retaining
screw
14. Elbow
15. Elbow
16. Cam
17. Impeller
18. Gasket
19. Cover
20. Screw
21. Bracket
22. Lockwasher
23. Bolt
22
19
10
~15 »~n~
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1
~ :
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4. Spacer
\
7 8
5. Snap ring
6. Bearings
5
7. Spacer
8. Cover
9. Shaft
10. Seal ring
11. Seal
12. Pump body
3
2. Remove the cover (18, Figure 28) and gasket (17).
Discard the gasket.
3. Extract the impeller (16, Figure 28) from the pump
body and remove the drive key (8).
4. Rotate the pump shaft to check the bearings for rough-
ness, excessive wear or other damage. Do not remove the
shaft assembly unless replacement is necessary.
5. Remove the snap ring (4, Figure 28).
6. Lightly tap the impeller shaft (7, Figure 28) toward the
front ofthe pump to remove the impeller shaft and bearing
assembly.
7. Unscrew the cam retaining screw (14, Figure 28), then
remove the cam (15).
NOTE
When removing bearings, note the snap ring
located between the bearings.