Toro Greens Aerator, Service Manual

Page: 50 / 130

Hydraulic Pump Service
35 ft–lb
(47 N–m)
1
2
6
3
7
4
11
10
5
16
8
15
9
14
12
13
18
17
20
21
23
25 ft–lb
(34 N–m)
22
19
Figure 17
1. Mounting stud (2 used) 9. Pressure plate 17. Seal (2 used)
2. Reservoir cap/dipstick 10. Pump ring 18. Control valve
3. Hydraulic fitting 11. Rotor 19. Control valve spring
4. O–ring 12. Rotor vane (10 used) 20. Pump housing
5. Pump reservoir 13. Thrust plate
6. Retaining ring 14. O–ring
7. End plate 15. O–ring
8. Pressure plate spring 16. Dowel pin (2 used)
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).
21. Retaining ring
22. Seal
23. Drive shaft
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.
Hydraulic System Page 4 – 20 Greens Aerator