Gear Pump
15
14
77
(105
to 93 ft--lb
to 126 N--m)
18
13
18
7
3
11
9
16
11
17
16
8
1
2
12
5
8
4
5
12
22
23
6
19
21
RIGHT
103 to 118 ft--lb
(140
to 160 N--m)
11
10
20
FRONT
Figure 56
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. 56)
Park machine on a level surface, lower cutting
decks, stop engine, engage parking brake and remove
key from the ignition switch.
4. To prevent contamination of hydraulic system during
removal, thoroughly clean exterior of pump and fittings.
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.
Raise seat and secure it with prop rod to gain access
to gear pump.
6. Disconnect hydraulic lines from gear pump and put
caps or plugs on open hydraulic lines and fittings. Label
disconnected hydraulic lines for proper assembly (Fig.
57).
3.
Drain the hydraulic reservoir into a suitable contain-
er.
Hydraulic System
Page 4 -- 72
Groundsmaster 4500--D/4700--D
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