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.
3
Removal (Fig. 67)
1.
brake, lower cutting decks and stop engine. Remove
key from the ignition switch.
Park themachine onalevelsurface, engage parking
2
1
2.
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
Read the General Precautions for Removing and
Figure 68
1.
2.
Piston (traction) pump
Gear pump
3.
Traction cable bracket
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.
4
7
12
2
11
10
9
8
8
13
14
3.
thoroughly clean traction and gear pump assembly and
all hydraulic connections.
To prevent contamination of the hydraulic system,
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.
1
1
2
7
5.
Pump Drive Shaft Removal in this section).
Remove hydraulic pump drive shaft (see Hydraulic
4
5
6
3
6.
Separate traction cable assembly from traction
Figure 69
pump (Fig. 69):
1.
2.
3.
4.
5.
6.
7.
Cap screw (2 used)
Flange nut (2 used)
Traction cable
Flange nut (2 used)
Flange screw (2 used)
Traction cable bracket
Cap screw (2 used)
8.
9.
Lock nut (2 used)
Flat washer
A. Removeflangenut(item4inFig.69)thatsecures
lever damper (item 14 in Fig. 69) to traction cable
bracket.
10. Flat washer
11. Ball joint
12. Traction lever bracket
13. Cap screw
14. Lever damper
B. Remove cap screws (items 7 and 13 in Fig. 69)
and lock nut(item 8in Fig. 69) that secure traction le-
ver bracket (item 12 in Fig. 69) to pump lever.
CAUTION
C. Loosen jam nuts that secure traction cable to
traction cable bracket (item 6 in Fig. 69).
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).
D. Position traction cable assembly away from
pump assembly.
7.
traction neutral switch and position harness away from
transmission.
Disconnect wire harness electrical connector from
8.
Connect alift or hoist to hole intraction cable bracket
on traction pump to support pump assembly and for
pump removal.
Groundsmaster 4300--D
Page 4 -- 69
Hydraulic System
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