Steering Control Unit Repairs - Toro Groundsmaster 455-D Service Manual

Steering Control Unit Repair (Fig. 32)
1. Set screw
2. Dust seal
3. Retaining ring
4. Gland seal bushing
5. Seal
6. Quad ring seal
7. Bearing race
8. Thrust (needle) bearing
9. Housing
Disassembly
Cleanliness is extremely important when repairing a
steering control unit. Work in a clean area. Before
disconnecting lines, clean port area of unit thoroughly.
Use a wire brush to remove foreign material and debris
from around exterior joints of the unit.
Repairs
Figure 32
10. Control sleeve
11. Centering springs
12. Control spool
13. Seal
14. Spacer plate
15. Drive
16. Gerotor
17. Spacer
18. End cap
Although not all drawings show the unit in a vise, it is
recommended that you keep the unit in the vise during
disassembly. Follow the clamping procedures explained
in the instructions.
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20. Centering pin
21. Check ball retainer
22. Check ball
23. Seal
24. Check ball seat
25. Seal
Groundsmaster
®
455-D