Steering Control Valve Service
8
1
3
24
2
6
7
4
5
19
20
19
23
22
1
50 in--lb
21
(17
N--m)
9
10
11
12
13
140
(16
to 160 in--lb
to 18 N--m)
14
15
16
17
18
Figure 75
1.
2.
3.
4.
5.
6.
7.
8.
Steering control valve housing
9.
10. End cap
11. O--ring
12. Seal ring
13. O--ring
14. Geroter assembly
15. O--ring
16. Spacer
Cap screw (7 used)
17. Geroter drive
18. Wear plate
Dust seal
O--ring
Spool
Spring retaining ring
Pin
Sleeve
Centering springs/spacers
19. Bearing race
20. Thrust bearing
21. Plug
22. O--ring
23. Relief valve
24. Quad seal
Disassembly (Fig. 75)
4. Slide the spool and sleeve assembly from the hous-
ing.
NOTE: Cleanliness is extremely important when
repairing steering control units. Work in a clean area.
Before disconnecting the hydraulic lines, clean the port
area of the steering control valve assembly. Before dis-
assembly, drain the oil, then plug the ports and thor-
oughly clean the exterior. During repairs, always protect
machined surfaces.
5. Remove the thrust bearing and bearing races (2).
6.
Remove the quad seal.
7.
dustsealfromthehousing.Becarefultonotdamagethe
dust seal seat in the housing.
Use a small blade screwdriver to carefully pry the
1.
control valve assembly.
Remove the seven (7) cap screws from the steering
8.
gether.
Remove the pin that holds the spool and sleeve to-
2.
wear plate, seal ring and O--rings from housing.
Remove end cap, geroter, spacer, geroter drive,
9.
tering springs and spring retaining ring will stay with the
spool as it is removed.
Carefully slide the spool out of the sleeve. The cen-
3.
Remove the plug and relief valve.
Hydraulic System
Page 4 -- 110
Groundsmaster 4100--D/4110--D
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| Document Type | Service Manual |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
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| Publisher | toro.com |
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