Rear Axle/Front Wheel Motor Service
15
to 18 ft--lb
FRONT WHEEL MOTOR SHOWN
(20 to 24 N--m)
1
7
9
2
13 10
10
9
11
18
8
6
19
20
14
15
16
12
4
5
3
17
Figure 75
1.
2.
3.
4.
5.
6.
7.
Drive shaft
Backplate
8.
9.
10. Thrust race
11. O--ring
12. Valve plate
13. Thrust bearing
14. Roll pin
Shaft seal (front motor only)
15. Roll pin
16. Bearing
17. Bearing
18. Washer
19. Plug
Retaining ring
Housing assembly
Rotating assembly
Cam plate insert
Retaining ring
20. O--ring
Cap screw
NOTE: Thefrontwheelmotors(showninFigure75)are
identical.Therearaxlemotor issimilar tothefrontwheel
motors. Service ofthe frontand rear motors requires the
same procedure.
Disassembly
1.
Clampthedriveshaftendofthepistonmotorinapro-
tected jaw vise with the cap screws up. Remove the six
cap screws (7) from the motor assembly.
NOTE: The rear axle motor does not have ashaftseal.
The case drain from the rear axle motor provides lu-
brication for the input gear case of the rear axle.
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 and 15)
in backplate.
Remove valve plate (12) and O--ring (11) from back-
Cleanliness is extremely important when repairing hy-
draulicmotors.Workinacleanarea.Beforedisconnect-
ing the lines, clean port area of motor. Thoroughly clean
the outside of the motor. After cleaning, remove port
plugs and drain oil from motor.
Hydraulic System (Rev. A)
Page 4 -- 86
Groundsmaster 4500--D/4700--D
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