Service manual

Groundsmaster 3280--D/3320Hydraulic System Page 5 -- 56
Lift Control Valve Service
1. Detent ball
2. Spring
3. Gasket
4. O--ring
5. Screw
6. Washer
7. Screw and lock washer (2 used)
8. Spool
9. Plug
10. Poppet stop
11. Poppet
12. End cap
13. Spacer
14. Adapter plug
15. O--ring
16. Detent plug
17. Spring
18. O--ring
19. Detent plunger
20. Spring
21. O--ring
22. Lockout seat (black)
23. O--ring
24. O--ring
25. Lockout seat (silver)
Figure 43
10
12
13
14
11
8
9
7
6
4
2
1
3
5
4
15
16
17
18
19
20
22
24
21
23
25
35 to 40 ft--lb
(47to54N--m)
24 to 36 in--lb
(2.7 to 4.1 N--m)
18 to 20 ft--lb
(24to27N--m)
35 to 40 ft--lb
(47to54N--m)
10 to 15 ft--lb
(14to20N--m)
Loctite #242
Loctite #242
18 to 20 ft--lb
(24to27N--m)
Loctite #242
Disassembly (Fig. 43)
1. Plug all ports and clean the outside of control valve
thoroughly.
2. Remove two (2) screws with lock washers (item 7)
that secure end cap (item 12) to control valve. R emove
end cap.
3. Remove screw (item 5), spacer (item 13), spring
(item 20) and washer (item 6) from control valve.
4. Carefully slide spool (item 8) from housing bore.
5. Carefully remove o--rings (item 4) from spool bore.
Take care not to damage spool bore or o--ring cavities
during o--ring removal.
6. Remove detent plug (item 16), o--ring (item 18),
spring (item 17) and detent ball (item 1).
7. Remove plug (item 9) with o--ring (item 21) and lock-
out seat (item 25) with o--ring (item 24) from valve body.
8. Remove adapter plug (item 14) with o--ring (item 15),
poppet stop (item 10), spring ( item 2), and poppet (item
11) from control valve body.