HYDROSTATIC POWER TRAIN
4252490-Rev A 5-53
5
Figure 5-54
Charge Pump
1. Note the orientation of charge pump housing (27),
and mark the housing and adjacent portions of
traction pump housing (18) to ensure correct
installation.
2. Clean traction pump shaft extension (33), and
remove any sharp edges and abrasive residue.
3. Remove four hex-head screws (28), and remove
charge pump housing (27), charge pump (31), and
O-ring (32).
4. Inspect seal (29) and bearing (30). Remove bearing
and seal only if replacement is required.
5. Inspect the wear surfaces of charge pump (31) for
excessive scratching or heavy wear patterns. If
replacement is required, replace entire charge pump
as a unit.
!
WARNING
NOTICE
6. Clean all parts using clean solvent, and dry using
compressed air.
18 Traction Pump Housing 24 Shim (A/R) (Implement Relief) 29 Seal 34 Poppet (Charge Relief)
19 Seal (2) 25 Spring (Implement Relief) 30 Bearing 35 Spring (Charge Relief)
20 Washer (2) 26 Poppet (Implement Relief) 31 Charge Pump (Gerotor) 36 Shim (A/R) (Charge Relief)
21 Retaining Ring (2) 27 Charge Pump Housing 32 O-Ring 37 O-Ring (Charge Relief)
22 Plug (Implement Relief) 28 Screw (4) 33 Shaft Extension 38 Plug (Charge Relief)
23 O-Ring (Implement Relief)
TN3913
29
28
27
19
21
22
30
31
32
22
23
24
25
26
19
20
21
38
37
36
35
34
18
33
Use appropriate eye protection when using
compressed air for cleaning or drying purposes.
Compressed air can cause serious personal
injury. Use safety reduction valves to reduce the
air pressure to a safe level before use.
It is important that all pump parts are absolutely
clean, as contamination can result in serious
damage and/or improper operation.
Never use shop towels or rags to dry parts after
cleaning, as lint may clog passages. Dry parts
using compressed air only.
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