Piston (Traction) Pump - Toro Groundsmaster 4700-D Service Manual

Piston (Traction) Pump

3
11
8
12
8
5
RIGHT
FRONT
1. Flat washer (2 used)
2. Cap screw (2 used)
o
3. 90 hydraulic fitting
4. Hydraulic tee fitting
5. O- -ring
6. Gear pump assembly
7. Piston pump assembly
o
8. 90 hydraulic fitting
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. To prevent contamination of hydraulic 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).
Hydraulic System
77 to 93 ft- -lb
(105 to 126 N- -m)
18
13
18
11
17
16
1
2
19
20
11
10
9. Coupler
o
10. 90 hydraulic fitting
11. O- -ring
12. O- -ring
o
13. 45 hydraulic fitting
14. Cap screw
15. Washer
16. O- -ring
Page 4 - - 76
14
7
9
16
22
6
103 to 118 ft- -lb
(140 to 160 N- -m)
Figure 60
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).
15
5
4
12
23
21
17. Spacer
18. O- -ring
19. O- -ring
20. Straight hose fitting
21. O- -ring
22. Straight hydraulic fitting
23. O- -ring
Groundsmaster 4500--D/4700--D