Hydraulic Pump Service - Toro Greens Aerator Service Manual

Hydraulic Pump Service

20
21
23
1. Mounting stud (2 used)
2. Reservoir cap/dipstick
3. Hydraulic fitting
4. O–ring
5. Pump reservoir
6. Retaining ring
7. End plate
8. Pressure plate spring
Disassembly (Fig. 17)
1. Empty any oil remaining in reservoir into a drain pan.
Thoroughly clean the outside of the pump assembly.
2. Using suitable puller, remove pulley from pump
shaft. Clean pump shaft with crocus cloth if any corro-
sion on shaft exists.
3. Remove the pump mounting studs (item 1).
4. Remove the hydraulic fitting (item 3) and o–ring (item
4). Discard o–ring.
5. Turn the pump so the shaft faces up. Remove the
control valve (item 18) and control valve spring (item
19).
Hydraulic System
13
14
15
19
22
9. Pressure plate
10. Pump ring
11. Rotor
12. Rotor vane (10 used)
13. Thrust plate
14. O–ring
15. O–ring
16. Dowel pin (2 used)
8
9
11
12
10
16
17
18
Figure 17
IMPORTANT: Prevent damage when clamping the
pump in a vise. Do not close vise enough to distort
pump housing.
6. Mount pump assembly in a vise clamping on the
housing around the shaft seal.
7. Using a soft face hammer, tap on pump reservoir
(item 5) to remove it from pump housing. Take care not
to damage reservoir during removal.
8. Remove o–ring (item 15) and seals (item 17). Retain
seals (item 17) to help identify correct replacement
seals from seal kit as different thicknesses of seals have
been used.
Page 4 – 20
35 ft–lb
(47 N–m)
2
6
5
7
17. Seal (2 used)
18. Control valve
19. Control valve spring
20. Pump housing
21. Retaining ring
22. Seal
23. Drive shaft
Greens Aerator
1
3
4
25 ft–lb
(34 N–m)