Gear Pump Service - Toro Groundsmaster
4000?D Service Manual

PRELIMINARY – For Toro Distributor and Toro Company use only.

Gear Pump Service

9
6
5
4
3
2
1
1. Dust seal
2. Retaining ring
3. Flange washer
4. Shaft seal
5. Front cover
6. Dowel pin (16 used)
7. Pressure seal
8. Back−up gasket
9. Thrust plate (8 used)
Disassembly (Fig. 38)
NOTE: The gear pump must be replaced as a complete
assembly. Individual gears, housings and thrust plates
are not available separately. Disassemble gear pump
for cleaning, inspection and seal replacement only.
IMPORTANT: Keep bodies, gears, flanges and
thrust plates for each pump section together; do not
mix parts between pump sections.
1. Plug pump ports and thoroughly clean exterior of
pump with cleaning solvent. Make sure work area is
clean.
2. Use a marker to make a diagonal line across the
gear pump for assembly purposes (Fig. 39).
Hydraulic System
16
15
14
13
12
10
9
11
21
8
7
20
10. Seal (8 used)
11. Idler gear
12. Drive shaft
13. Back−up gasket
14. Pressure seal
15. Front body
16. Splined connecting shaft (3 used)
17. Flange
18. Drive gear
18
17
21
22
Figure 38
DIAGONAL LINE
Page 4 − 56
19
24
11
23
22
33 ft−lb
(45 N−m)
19. Body
20. Body
21. Drive gear
22. Idler gear
23. Rear body
24. Rear cover
25. Cap screw (4 used)
26. Washer (4 used)
Figure 39
Groundsmaster 4000−D
26
25