Toro Workman 3000 Series, Service Manual

Page: 218 / 306

Rev. D Workman 3000/4000 Series Page 9 -- 28 Hydraulic System
Gear Pump Service (Barnes Gear Pump)
1. Retaining ring
2. Shaft seal
3. Spacer
4. Crescent ring
5. Square key
6. Drive shaft
7. Shear pin
8. Stator
9. Seal plate
10. Wear plate
11. Gear
12. Bearing
13. Pressure plate
14. Back--up seal
15. Pressure plate seal
16. Dowel pin
17. Gear end housing
18. Socket head cap screw
19. Plug
20. Idler shaft
21. Wear plate seal
22. Bearing
23. Ball key
Figure 23
1
2
3
4
5
6
7
8
9
10
16
17
18
19
20
21
22
23
11
1213
14
15
12
11
4
4
12
9.5 to 12.5 ft--lb
(13 to 17 N--m)
16
Before disassembling gear pump, plug ports, wash exte-
rior of pump with cleaning solvent and dry pump thor-
oughly.
Shaft Seal Replacement (Fig. 23)
1. Remove retaining ring (Item 1).
2. Punch two (2) holes in face of seal, 180
o
apart, and
install metal screws. Remove shaft seal from gear pump
by grasping and pulling on screws.
IMPORTANT: Do not try to pry seal out of housing.
This can damage the shaft seal bore so oil will leak
past the seal.
3. Discard shaft seal (Item 2). Remove spacer (Item 3).
4. Clean any foreign material from seal bore and drive
shaft of pump.
5. Install spacer (Item 3) on driveshaft.
6. Put a seal protector tool on driveshaft or apply thin
plastic or tape on shaft to protect new seal from damage.
7. Apply grease or petroleum jelly to inside diameter of
new seal.
8. Use a seal installation tool to install new shaft seal
(Item 2). Make sure seal is installed square with seal
bore.
9. Install retaining ring (Item 1).