Removal (Fig. 75)
10.Label all hydraulic hoses for assembly purposes.
Remove hydraulic hoses from fittings on wheel motor.
Allow hoses to drain into a suitable container.
CAUTION
11.
Putclean plugs in disconnected hydraulic hoses and
fittings to prevent system contamination.
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.
12.Support
ing removal.
thewheelmotortopreventitfromfallingdur-
13.Remove four (4) cap screws and lock washers that
secure wheel motor to the steering spindle.
1.
Park themachine onalevelsurface, engage parking
brake, lower cutting decks and stop engine. Remove
key from the ignition switch.
14.Remove
wheel motor from frame.
15.If
necessary, remove hydraulic fittings from wheel
motor. Remove and discard O--rings from fittings.
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.
Installation (Fig. 75)
IMPORTANT: Because of internal differences in
rear wheel motors, DO NOT interchange rear wheel
motors on machine (i.e. do not put right side motor
on left side of machine). The left side wheel motor
has a yellow identification mark on the motor hous-
ing. If necessary, use parts catalog and part number
on wheel motor to identify RH and LH motors.
3.
Chock frontwheelstopreventmachine fromshifting.
4.
and lock nut (item 14) that secures wheel hub to wheel
motor.
Loosen, but do not remove, five (5) wheel lug nuts
WARNING
1.
If fittings were removed from wheel motor, lubricate
and install new O--rings to hydraulic fittings. Install fit-
tingsintowheelmotorports(seeHydraulicFittingInstal-
lationintheGeneralInformation sectionofthischapter).
Beforejackingupthemachine,reviewandfollow
Jacking Instructions in Chapter 1 -- Safety.
2.
sure that ports in wheel motor are facing toward the rear
of the machine.
Position rear wheel motor to steering spindle. Make
5.
rear wheel. Support machine with jack stands.
Jack up machine enough to allow the removal of the
6.
RearWheelRemovalintheServiceandRepairssection
of Chapter 6 -- Chassis).
Removerearwheelassemblyfromthemachine(see
3.
screws and lock washers.
Secure wheel motor to spindle with four (4) cap
4.
hoses and wheel motor fittings that were placed during
wheel motor removal to prevent contamination.
Remove caps or plugs from disconnected hydraulic
IMPORTANT: DO NOT hit wheel hub, wheel hub
puller or wheel motor with a hammer during wheel
motor removal or installation. Hammering may
cause damage to the wheel motor.
5.
Using labels placed during the removal process,
properly connect hydraulic hoses to wheel motor fittings
(see Hydraulic Hose and Tube Installation in the Gener-
al Information section of this chapter).
7.
Make sure that lock nut (item 14) that secures wheel
hub to wheel motor is loosened at least two (2) turns.
Usehubpuller(seeSpecialToolsinthischapter)toloos-
en wheel hub from wheel motor.
6.
Make sure that tapers of wheel motor shaft and
wheel hub are thoroughly clean.
8.
Remove loosened lock nut and wheel hub from mo-
tor shaft. Discard lock nut. Locate and retrieve woodruff
key from wheel motor shaft.
7.
Positionwoodruffkeytokeyslotinwheelmotorshaft.
IMPORTANT: Do not reuse lock nut that secures
wheelhubtowheelmotorafterithasbeenremoved.
9.
rear wheel motor to prevent hydraulic system contami-
nation.
Thoroughlycleanhydraulichoseendsandfittingson
Groundsmaster 4300--D
Page 4 -- 81
Hydraulic System
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