Rear Axle/Front Wheel Motor Service
9
15 to 18 ft--lb
(20
to 24 N--m)
10
13
10
9
7
2
1
11
18
8
6
14
15
16
12
4
5
3
17
Figure 64
1.
2.
3.
4.
5.
6.
Drive shaft
7.
8.
9.
10. Thrust race
11. O--ring
12. Valve plate
Cap screw (6 used)
13. Thrust bearing
14. Roll pin
Backplate (front motor shown)
Housing assembly
Rotating assembly
Cam plate insert
Shaft seal
Retaining ring
15. Roll pin
16. Bearing
17. Bearing
18. Washer
Retaining ring
NOTE: The front wheel motors are identical. The rear
axle motor has some differences from the front motors.
Service of the front and rear motors requires the same
procedures.
Disassembly (Fig. 64)
Clampthedriveshaftendofthepistonmotorinapro-
tected jaw vise with the cap screws up. Remove the six
cap screws (7) from the motor assembly.
1.
Cleanliness is extremely important when repairing
these motors. Work in a clean area. Before disconnect-
ing the lines, clean port area of motor. Thoroughly clean
the outside of the motor. After cleaning, remove port
plugs and drain oil.
2.
loosen and remove from housing.
Use a soft face hammer and tap the backplate (2) to
3.
plate. It is not necessary to remove roll pins (14, 15) in
backplate.
Remove valve plate (12) and O--ring (11) from back-
Hydraulic System
Page 4 -- 82
Groundsmaster 4100--D
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