Rear Axle/Front Wheel Motor Service - Toro Groundsmaster
4000?D Service Manual

PRELIMINARY – For Toro Distributor and Toro Company use only.

Rear Axle/Front Wheel Motor Service

18
8
6
17
1. Drive shaft
2. Backplate (front motor shown)
3. Housing assembly
4. Rotating assembly
5. Cam plate insert
6. 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.
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.
Hydraulic System
10
13
10
9
1
3
Figure 60
7. Cap screw
8. Shaft seal
9. Retaining ring
10. Thrust race
11. O−ring
12. Valve plate
Page 4 − 82
9
11
12
4
5
13. Thrust bearing
14. Roll pin
15. Roll pin
16. Bearing
17. Bearing
18. Washer
Disassembly (Fig. 60)
1. Clamp the drive shaft end of the piston motor in a pro-
tected jaw vise with the cap screws up. Remove the six
cap screws (7) from the motor assembly.
2. Use a soft face hammer and tap the backplate (2) to
loosen and remove from housing.
3. Remove valve plate (12) and O−ring (11) from back-
plate. It is not necessary to remove roll pins (14, 15) in
backplate.
15 to 18 ft−lb
(20 to 24 N−m)
7
2
14
15
16
Groundsmaster 4000−D