Gear Pump Service - Toro Groundsmaster 7200 Service Manual

Gear Pump Service

3
2
1
18
17
1. Shaft seal
2. Front pressure seal
3. Front back–up ring
4. Drive gear
5. Rear back–up ring
6. Rear pressure seal
Disassembly (Fig. 96)
1. Install clean plugs in pump ports and clean the out-
side of the pump thoroughly. After cleaning, remove
plugs and drain any oil out of the pump.
2. Use a marker to make a "V" across the front plate,
body and back plate for assembly purposes (Fig. 97).
IMPORTANT: When clamping the pump in a vise,
clamp only on mounting flange. DO NOT clamp
pump body in a vise.
3. Clamp mounting flange of pump in a vise with the
shaft end down.
4. Loosen four (4) socket head screws that secure the
back plate.
5. Remove pump from the vise. Remove socket head
screws and lock washers.
Hydraulic System
6
5
4
14
15
16
Figure 96
7. O–ring
8. Implement relief valve
9. Socket head screw (4 used)
10. Lock washer (4 used)
11. Back plate
12. Body
Page 4 – 80
220 in–lb
(25 N–m)
7
12
13
13. Dowel pin
14. Rear bearing block
15. Idler gear
16. Front bearing block
17. Front plate
18. Retaining ring
MARKER LINES
8
10
11
7
220 in–lb
(25 N–m)
Figure 97
Groundsmaster 7200/7210
9