Steering Control Valve Service - Toro Groundsmaster 360 Service Manual

Steering Control Valve Service

1
26
2
150 in- -lb
(17 N- -m)
1. Steering valve housing
2. Dust seal
3. O- -ring
4. Spool
5. Spring retaining ring
6. Pin
7. Sleeve
8. Centering springs/spacers
9. Cap screw (7 used)
10. End cap
Disassembly (Fig. 130)
NOTE: Cleanliness is extremely important when
repairing hydraulic components. Work in a clean area.
Before disassembly, drain the oil, then plug the ports
and thoroughly clean the exterior. During repairs,
always protect machined surfaces.
1. Remove the seven (7) cap screws from the steering
valve assembly.
2. Remove end cap, geroter, spacer, geroter drive,
wear plate, seal ring, and O--rings from housing (Fig.
130).
3. Remove the plug and relief valve.
Hydraulic System
28
27
8
3
24
23
22
30
29
21
17
18
Figure 130
11. O- -ring
12. Seal ring
13. O- -ring
14. Geroter
15. O- -ring
16. Spacer
17. Geroter drive
18. Wear plate
19. Bearing race
20. Thrust bearing
Page 4 - - 114
5
4
19
19
20
25
12
13
14
15
16
4. Slide the spool and sleeve assembly from the hous-
ing.
5. Remove the thrust bearing and bearing races (2).
6. Remove the quad seal.
7. Use a small blade screwdriver to carefully pry the
dust seal from the housing. Be careful to not damage the
dust seal seat in the housing.
8. Remove the pin that holds the spool and sleeve to-
gether.
9. Carefully slide the spool out of the sleeve. The cen-
tering springs and spring retaining ring will stay with the
spool as it is removed.
6
7
9
10
11
140 to 160 in- -lb
(16 to 18 N- -m)
21. Plug
22. O- -ring
23. Relief valve
24. Quad seal
25. Ring
26. T port (return to tank)
27. E port (flow beyond)
28. R port
29. L port
30. P port (from pump)
Groundsmaster 360