Piston Pump Service - Toro 30821 Service Manual

Piston Pump Service

4
26
5
6
48
3
2
1
31
33 30
35
34
1. Key
2. Drive shaft
3. Bearing
4. Cap screw (3 used per plate)
5. Cover plate
6. O- ring
7. Shim
8. Bearing cone
9. Key
10. Cam plate
11. Rotating kit
12. Gasket
13. Cam plate
14. Bearing
15. Dowel pin
16. Back plate
NOTE: For repair of the piston pump, see the Eaton
Medium Duty Piston Pump Repair Information Model
70160 Variable Displacement Piston Pump at the end of
this chapter.
IMPORTANT: If a piston pump failure occurred, re-
fer to Traction Circuit (Closed Loop) Component
Failure in the General Information section for infor-
mation regarding the importance of removing con-
tamination from the traction circuit.
Hydraulic System (Rev. G)
42
40 41
39
38
37
10
29
8
30
31
32
17. O- ring
18. Plug
19. Spring
20. Seat
21. Bypass valve
22. Cap screw
23. Cap screw
24. Shaft seal
25. Cover plate
26. Washer (3 used per plate)
27. Relief valve
28. Coupler
29. Housing
30. Retaining ring
31. Thrust washer
32. Thrust bearing
43
18
17
16
13
15
12
11
9
8
48
6
7
24
Figure
107
Page 4 - 104
19
27
21
38
20
14
15
47
46
45
44
25
26
4
33. Washer
34. Shaft seal
35. Retaining ring
36. Retaining ring
37. Cam plate insert
38. Retaining ring
39. Washer
40. Charge relief spring
41. Charge relief poppet
42. Charge relief housing
43. O- ring
44. Cartridge
45. O- ring
46. Bleed- off spring
47. Bleed- off valve poppet
48. Bearing cup
Groundsmaster 3500- D
22
28
22
23
19
17
18