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Groundsmaster 4000--DHydraulic System Page 4 -- 76
Piston (Traction) Pump Service
1. Jam nut
2. Retaining ring
3. Retaining ring
4. Seal washer
5. Socket head screw
6. Rotating kit assembly
7. Servo piston assembly
8. Piston follower
9. Cover plate
10. Cover plate
11. Camplate assembly
12. Thrust race
13. Thrust bearing
14. Bypass valve
15. Cap screw
16. Relief valve (Reverse)
17. Socket head screw
18. Valve plate
19. Pump housing
20. Backplate assembly
21. Drive shaft
22. Nut
23. Lock washer
24. Washer
25. Shaft seal
26. Relief valve (Forward)
27. Control arm
28. Servo control assembly
29. Washer
30. Orifice plate (3 used)
31. Flat washer
32. Housing gasket
33. Cover plate gasket
34. Control assembly gasket
35. Plug
36. O--ring
37. Seal sub--assembly
38. Roll pin
39. Bearing
40. Dowel bushing
41. Cradle sub--assembly
42. Cap screw
43. Button head cap screw
44. Bushing
45. Bearing
Figure 55
20
8
32
6
7
31
5
18
11
9
33
19
33
10
1
29
4
3
12
13
24
3
21
31
25
2
34
30
28
23
27
22
17
14
26
15
16
36
35
37
38
39
40
41
42
43
44
45
37
100 to 110 ft--lb
(136 to 149 N--m)
(136 to 149 N--m)
40 to 48 in--lb
150 to 160 in--lb
(17to18N--m)
(4.5 to 5.4 N--m)
40 to 48 in--lb
25 to 28 ft--lb
(34to38N--m)
27 to 31 ft--lb
(37to42N--m)
4to6ft--lb
(5 to 8 N--m)
40 to 48 in--lb
(4.5 to 5.4 N--m)
5
(4.5 to 5.4 N--m)
100 to 110 ft--lb
NOTE: Forservice ofthe piston (traction)pump(includ-
ing the servo control (item 28), see the Eaton Model
72400 Servo Controlled Piston Pump Repair Informa-
tion at the end of this chapter.