Special Tools 6 - Toro GroundsmasterR 4300-D Service Manual

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.
Removal (Fig. 74)
1. Park the machine on a level surface, engage parking
brake, lower cutting decks and stop engine. Remove
key from the ignition switch.
2. Chock rear wheels to prevent machine from shifting.
3. Loosen, but do not remove, five (5) wheel lug nuts
and lock nut (item 17) that secures wheel hub to wheel
motor.
4. Read the General Precautions for Removing and
Installing Hydraulic System Components at the begin-
ning of the Service and Repairs section of this chapter.
WARNING
Before jacking up the machine, review and follow
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. Remove front wheel from machine (see Front Wheel
Removal in the Service and Repairs section of Chapter
6 -- Chassis).
7. Remove return spring and clevis pin that secure
brake cable clevis to brake actuator lever. Position
brake cable clevis away from actuator lever.
8. Remove brake drum.
9. Make sure wheel hub lock nut (item 17) is loosened
at least two (2) turns.
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.
10.Use hub puller (see Special Tools in this chapter) to
loosen wheel hub from wheel motor.
11. Remove lock nut and wheel hub from motor shaft.
Discard lock nut. Locate and retrieve square key.
Groundsmaster 4300--D
12.Thoroughly clean hydraulic line ends and fittings on
wheel motor to prevent hydraulic system contamination.
13.Label hydraulic connections at wheel motor for as-
sembly purposes.
14.Disconnect hydraulic lines from fittings on wheel mo-
tor. Allow lines to drain into a suitable container.
15.Put caps or plugs on disconnected lines and fittings
to prevent contamination.
16.Support wheel motor to prevent it from falling. Re-
move four (4) lock nuts from cap screws that secure mo-
tor and brake bracket to frame.
17.Remove four (4) cap screws, brake assembly with
brake bracket (item 14) and brake spring bracket (item
30) from wheel motor and frame.
18.Remove wheel motor from machine.
19.If hydraulic fittings are to be removed from wheel mo-
tor, mark fitting orientation to allow correct assembly.
Remove fittings from motor and discard O--rings.
Installation (Fig. 74)
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.
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
to properly orientate fittings (see Hydraulic Fitting Instal-
lation in the General Information section of this chapter).
2. Position wheel motor to frame. Slide brake assembly
with brake bracket (item 14), brake spring bracket (item
30) and four (4) cap screws onto wheel motor and frame.
3. Install and tighten four (4) lock nuts onto cap screws
to secure motor and brake components to frame. Torque
cap screws from 80 to 100 ft- -lb (109 to 135 N- -m).
4. Thoroughly clean motor shaft and wheel hub taper.
5. Install square key into the wheel motor shaft keyslot.
Align wheel hub with key and slide wheel hub onto motor
shaft.
IMPORTANT: Do not reuse lock nut that secures
wheel hub to wheel motor after it has been removed.
Page 4 - - 77 Hydraulic System