Service And Repairs 5 - Toro GroundsmasterR 4300-D Service Manual

NOTE: Traction pump and gear pump should be re-
moved from machine as an assembly. Once removed
from machine, pumps can be separated for service.
Removal (Fig. 67)
1. Park the machine on a level surface, engage parking
brake, lower cutting decks and stop engine. Remove
key from the ignition switch.
2. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
CAUTION
Before opening hydraulic system, operate all hy-
draulic controls to relieve system pressure and
avoid injury from pressurized hydraulic oil. See
Relieving Hydraulic System Pressure in the Gen-
eral Information section of this chapter.
3. To prevent contamination of the hydraulic system,
thoroughly clean traction and gear pump assembly and
all hydraulic connections.
4. Label hydraulic hoses to assist in assembly. Discon-
nect all hydraulic hoses and tubes from fittings on the
traction and gear pump assembly. Allow hydraulic lines
to drain into a suitable container. Plug or cap openings
of pumps and lines to prevent contamination.
5. Remove hydraulic pump drive shaft (see Hydraulic
Pump Drive Shaft Removal in this section).
6. Separate traction cable assembly from traction
pump (Fig. 69):
A. Remove flange nut (item 4 in Fig. 69) that secures
lever damper (item 14 in Fig. 69) to traction cable
bracket.
B. Remove cap screws (items 7 and 13 in Fig. 69)
and lock nut (item 8 in Fig. 69) that secure traction le-
ver bracket (item 12 in Fig. 69) to pump lever.
C. Loosen jam nuts that secure traction cable to
traction cable bracket (item 6 in Fig. 69).
D. Position traction cable assembly away from
pump assembly.
7. Disconnect wire harness electrical connector from
traction neutral switch and position harness away from
transmission.
Groundsmaster 4300--D
2
1. Piston (traction) pump
2. Gear pump
4
8
13
14
1
1
2
3
1. Cap screw (2 used)
2. Flange nut (2 used)
3. Traction cable
4. Flange nut (2 used)
5. Flange screw (2 used)
6. Traction cable bracket
7. Cap screw (2 used)
Make sure lift or hoist can support the total
weight of the pump assembly before removing
the cap screws from the pump assembly and
frame. Pump assembly weighs approximately 67
pounds (30.5 kg).
8. Connect a lift or hoist to hole in traction cable bracket
on traction pump to support pump assembly and for
pump removal.
Page 4 - - 69
3
1
Figure 68
3. Traction cable bracket
7
12
2
11
10
9
8
7
4
5
6
Figure 69
8. Lock nut (2 used)
9. Flat washer
10. Flat washer
11. Ball joint
12. Traction lever bracket
13. Cap screw
14. Lever damper
CAUTION
Hydraulic System