Toro Greensmaster TriFlex 3320/3420 Service Manual page 121

Rear Wheel Motor (Optional 3WD) Removal (Fig. 47)
1. Park machine on a level surface, engage the parking
brake, lower the cutting units and stop the engine. Re-
move key from the ignition switch.
CAUTION
Before continuing further, read and become fa-
miliar with General Precautions for Removing
and Installing Hydraulic System Components in
this section.
2. Loosen, but do not remove, rear wheel lug nuts (item
5) and lock nut (item 4). Loosen lock nut at least two (2)
turns.
3. Chock both front wheels to prevent the machine from
moving. Lift rear wheel off the ground using a jack and
place appropriate jack stands beneath the frame to sup-
port the machine.
4. Remove lug nuts and rear wheel assembly.
IMPORTANT: DO NOT hit wheel hub, wheel hub
puller or wheel motor with a hammer during wheel
hub removal or installation. Hammering may cause
damage to the wheel motor.
5. Use wheel hub puller (see Special Tools in this chap-
ter) to loosen wheel hub from rear wheel motor.
6. Remove lock nut and wheel hub from rear wheel mo-
tor. Locate and retrieve woodruff key (item 23).
7. Thoroughly clean hydraulic tube ends and fittings on
rear wheel motor to prevent hydraulic system contami-
nation.
8. Label hydraulic connections at rear wheel motor for
assembly purposes.
9. Disconnect hydraulic tubes from fittings on wheel
motor. Allow lines to drain into a suitable container.
10.Put clean caps or plugs on disconnected tubes and
fittings to prevent contamination.
11. Support wheel motor to prevent it from falling. Re-
move two (2) cap screws (item 7), two (2) socket head
screws (item 6) and two (2) flange nuts (item 8) that se-
cure wheel motor to rear fork. Remove rear wheel motor
and motor plate (item 2) from machine.
12.If fitting removal from wheel motor is necessary,
mark fitting orientation to allow correct assembly. Re-
move hydraulic fittings and O--rings from motor. Discard
removed O--rings.
Greensmaster 3320/3420
Rear Wheel Motor (Optional 3WD) Installation (Fig.
47)
1. If fittings were removed from rear wheel motor, lubri-
cate and place new O--rings onto motor fittings. Install
fittings into motor openings making sure that fitting ori-
entation is as noted during removal. Tighten fittings (see
Hydraulic Fitting Installation in the General Information
section of this chapter).
2. Place motor plate (item 2) on rear wheel motor and
position motor to rear fork. Secure wheel motor to rear
fork with two (2) cap screws (item 7), two (2) socket head
screws (item 6) and two (2) flange nuts (item 8). Torque
fasteners to 75 ft- -lb (101 N- -m).
3. Remove caps from disconnected hydraulic tubes.
4. Lubricate and position new O--rings to fittings on rear
wheel motor. Use labels placed during the removal pro-
cess to properly install hydraulic tubes to wheel motor fit-
tings (see Hydraulic Hose and Tube Installation in the
General Information section of this chapter).
5. Thoroughly clean wheel motor shaft and wheel hub
taper.
6. Install woodruff key into the wheel motor shaft key-
slot. Align wheel hub with woodruff key and slide wheel
hub onto motor shaft. Secure hub with lock nut.
7. Install rear wheel to machine and secure with four (4)
lug nuts.
Failure to maintain proper wheel lug nut and
wheel hub lock nut torque could result in failure
or loss of wheel and may result in personal injury.
8. Lower machine to ground. Torque lock nut from 250
to 400 ft- -lb (339 to 540 N- -m) and wheel lug nuts from
65 to 85 ft- -lb (89 to 115 N- -m).
9. Check oil level in hydraulic reservoir and add correct
oil if necessary.
10.Follow Hydraulic System Start--up procedures (see
Hydraulic System Start--up in this section).
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WARNING
Hydraulic System