Piston (Traction) Pump
15
14
77
(105
to 93 ft--lb
to 126 N--m)
18
13
7
18
3
11
9
16
11
17
16
8
1
2
12
5
8
4
5
12
22
6
23
19
1
(140
03 to 118 ft--lb
to 160 N--m)
21
RIGHT
11
10
20
FRONT
Figure 60
1.
2.
3.
4.
5.
6.
7.
8.
Flat washer (2 used)
Cap screw (2 used)
90o hydraulic fitting
9.
Coupler
17. Spacer
18. O--ring
19. O--ring
20. Straight hose fitting
21. O--ring
22. Straight hydraulic fitting
23. O--ring
10. 90o hydraulic fitting
11. O--ring
Hydraulic tee fitting
O--ring
12. O--ring
13. 45o hydraulic fitting
14. Cap screw
15. Washer
16. O--ring
Gear pump assembly
Piston pump assembly
90o hydraulic fitting
Removal (Fig. 60)
Park machine on a level surface, lower cutting
decks, stop engine, engage parking brake and remove
key from the ignition switch.
4. Disconnect wire harness connector from neutral
switch on traction pump (Fig. 61).
1.
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.
2.
To prevent contamination of hydraulic system during
removal, thoroughly clean exterior of pump assembly.
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).
3.
Remove traction rod from control arm on piston
pump by removing lock nut and flange head screw (Fig.
61).
Hydraulic System
Page 4 -- 76
Groundsmaster 4500--D/4700--D
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