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 1. Cover
13.
Bearing
24.
Plug
2. Gasket
14.
Bearing
25.
Bearing
3. Impeller
15.
Gear, drive
26.
Nut
4. Vent plug
16.
Locknut
27.
Rod
5. Stud
17.
Coupling
28.
Valve
6. Nut
18.
Coupling
29.
Spring
7. Plate
19.
Impeller
30.
Guide
8. Bracket
20.
Drain
31.
Nut
9. Nut
21.
Housing
32.
Stop
10. Locknut
22.
Plate
33.
Spring
11. Shaft
23.
Pin, dowel
34.
Valve
12. Bearing
Figure 3-25. Lubrication oil pump.
(4) Remove housing (21) from bracket (8). Place
(9) Remove nut from end of shaft (11) and pull off the
housing (pump) on workbench.
gear (15).
(5) Remove bracket (8) from studs (5). Pull the drive
(10) Remove retainer and bearing (14) from shaft.
from housing and place it on the workbench.
(11) Remove coupling (17) and shaft (11) out of
bearing (13) then remove the bearing.
c. Disassembly.
(1) Remove locknut (16) and coupling (18).
d. Cleaning, Inspection, and Repair.
(2) Remove locknut (10) and bearing (12) from shaft
(1) Inspect bearings for roughness or looseness. Replace
(11).
defective bearings.
(3) Remove nuts (26) and (9). Lift cover (1) off dowel
(2) Inspect impellers (3 and 19) for significant wear.
pins (23).
Replace worn impellers.
(4) Remove locknuts from bearings (25) then remove
(3) Wash all parts in clean fuel oil and wipe dry. Clean
the bearings.
all gasket surfaces.
(5) Move plate (22) off pins (23) and remove plate.
NOTE
(6) Remove the impellers (3 and 19).
Use new gaskets at reassembly of the
(7) Remove nut (31), stop (32), spring (33), and valve
pump.
(34).
(8) Lift out guide (30), spring (29), valve (28), and rod
(4) Examine stop (32). Replace a worn or scratched
(27).
stop.
NOTE
(5) Insert rod (27) in the guide (30). If rod is loose in
During disassembly of housing (21), tag
guide, replace the guide. Inspect the rod (27). Replace a
the
components
for
reassembly
worn or bent rod.
(6) Inspect springs (29 and 33). Replace broken or
identification.
weak springs.
3-60
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