12.Thoroughly
wheelmotortopreventhydraulicsystemcontamination.
clean hydraulic line ends and fittings on
CAUTION
13.Label
hydraulic connections at wheel motor for as-
sembly purposes.
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.
14.Disconnect
hydraulic linesfromfittingsonwheelmo-
tor. Allow lines to drain into a suitable container.
15.Put
caps or plugs on disconnected lines and fittings
to prevent contamination.
Removal (Fig. 74)
16.Support
move four (4) lock nuts from cap screws thatsecure mo-
tor and brake bracket to frame.
wheel motor to prevent it from falling. Re-
1.
brake, lower cutting decks and stop engine. Remove
key from the ignition switch.
Park themachine onalevelsurface, engage parking
17.Remove
four (4) cap screws, brake assembly with
brake bracket (item 14) and brake spring bracket (item
from wheel motor and frame.
2.
3.
Chock rear wheels to prevent machine from shifting.
Loosen, but do not remove, five (5) wheel lug nuts
30)
and lock nut (item 17) that secures wheel hub to wheel
motor.
18.Remove
wheel motor from machine.
19.If
tor, mark fitting orientation to allow correct assembly.
Remove fittings from motor and discard O--rings.
hydraulicfittingsaretoberemovedfromwheelmo-
4.
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
Read the General Precautions for Removing and
Installation (Fig. 74)
WARNING
IMPORTANT: Because of internal differences in
front wheel motors, DO NOT interchange front
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
housing. If necessary, use parts catalog and part
number on wheel motor to identify RH and LH mo-
tors.
Beforejackingupthemachine,reviewandfollow
Jacking Instructions in Chapter 1 -- Safety.
5.
Jack up machine enough to allow the removal of the
front wheel. Support machine with jack stands.
6.
Removal in the Service and Repairs section of Chapter
6
Remove front wheel from machine (see Front Wheel
1.
If fittings were removed from wheel motor, lubricate
and place new O--rings to fittings. Install fittings into mo-
tor ports using marks made during the removal process
toproperly orientatefittings(seeHydraulic FittingInstal-
lationintheGeneralInformation sectionofthischapter).
-- Chassis).
7.
brake cable clevis to brake actuator lever. Position
brake cable clevis away from actuator lever.
Remove return spring and clevis pin that secure
2.
Position wheelmotor toframe.Slidebrakeassembly
with brake bracket (item 14), brake spring bracket (item
8.
9.
Remove brake drum.
30)
andfour(4)capscrewsontowheelmotorandframe.
Install and tighten four (4) lock nuts onto cap screws
Make sure wheel hub lock nut (item 17) is loosened
3.
at least two (2) turns.
tosecuremotorandbrakecomponentstoframe.Torque
cap screws from 80 to 100 ft--lb (109 to 135 N--m).
IMPORTANT: DO NOT hit wheel hub, puller or wheel
motor with a hammer during wheel hub removal or
installation. Hammering may cause damage to the
wheel motor.
4.
Thoroughly clean motor shaft and wheel hub taper.
5.
Install square key into the wheel motor shaft keyslot.
Alignwheelhubwithkeyandslidewheelhubontomotor
shaft.
10.Use
loosen wheel hub from wheel motor.
hub puller (see Special Tools in this chapter) to
IMPORTANT: Do not reuse lock nut that secures
wheelhubtowheelmotorafterithasbeenremoved.
11.
Discard lock nut. Locate and retrieve square key.
Remove lock nut and wheel hub from motor shaft.
Groundsmaster 4300--D
Page 4 -- 77
Hydraulic System
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