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Groundsmaster 4500--D/4700--DHydraulic System Page 4 -- 76
Piston (Traction) Pump
1. Flat washer (2 used)
2. Cap screw (2 used)
3. 90
o
hydraulic fitting
4. Hydraulic tee fitting
5. O--ring
6. Gear pump assembly
7. Piston pump assembly
8. 90
o
hydraulic fitting
9. Coupler
10. 90
o
hydraulic fitting
11. O--ring
12. O--ring
13. 45
o
hydraulic fitting
14. Cap screw
15. Washer
16. O--ring
17. Spacer
18. O--ring
19. O--ring
20. Straight hose fitting
21. O--ring
22. Straight hydraulic fitting
23. O--ring
Figure 60
FRONT
RIGHT
1
2
3
4
23
16
6
12
8
9
10
5
21
11
17
20
19
14
15
22
7
5
11
12
8
16
18
13
18
11
77 to 93 ft--lb
(105 to 126 N--m)
103 to 118 ft--lb
(140 to 160 N--m)
Removal (Fig. 60)
1. Park machine on a level surface, lower cutting
decks, stop engine, engage parking brake and remove
key from the ignition switch.
2. Toprevent contamination ofhydraulic system during
removal, thoroughly clean exterior of pump assembly.
3. Remove traction rod from control arm on piston
pump by removing lock nut and flange head screw (Fig.
61).
4. Disconnect wire harness connector from neutral
switch on traction pump (Fig. 61).
5. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
6. Put a drain pan below the pump assembly. Remove
hydraulic hoses connected to piston and gear pumps.
Put plugs or caps on disconnected hydraulic hoses and
fittings to prevent contamination of the system (Fig. 62).