Toro GroundsmasterR 4300-D Service Manual page 207

6. Remove return spring and clevis pin that secure
brake cable to brake actuator lever. Position brake cable
end away from lever.
7. Remove brake drum.
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.
8. Make sure that lock nut on wheel motor shaft is loos-
ened at least two (2) turns. Use hub puller (see Special
Tools) to loosen wheel hub from wheel motor.
9. Remove lock nut and wheel hub from motor shaft.
Discard lock nut. Locate and retrieve square key.
NOTE: If desired, the complete brake assembly can be
removed from the machine for disassembly (see step
12).
10.Remove upper and lower shoe springs from brake
shoes.
11. Remove shoe hold down cups and hold down
springs. Remove brake shoes and hold down pins from
backing plate.
12.If necessary, remove brake backing plate from ma-
chine by loosening and removing four (4) cap screws
(item 26) and lock nuts (item 27).
Installation (Fig. 6)
1. Remove rust and debris from all brake parts with a
wire brush prior to installation. Clean all parts. Inspect
brake shoe contact surfaces of the brake drum for ex-
cessive wear. Replace any worn or damaged parts.
2. If brake backing plate was removed from machine,
secure backing plate to brake bracket with four (4) cap
screws (item 26) and lock nuts (item 27).
3. Lightly lubricate brake shoe pivot points with general
purpose grease.
4. Position one brake shoe to the backing plate. Install
brake hold down pin and secure with hold down spring
and cup. Repeat for second brake shoe.
5. Install upper and lower shoe springs to brake shoes.
Make sure that brake shoes are properly positioned to
pivot and actuator points.
IMPORTANT: Before wheel hub is installed, thor-
oughly clean tapers of wheel hub and wheel motor
shaft. Make sure that tapers are free of grease, oil
and dirt. Do not use antiseize lubricant when instal-
ling wheel hub.
Groundsmaster 4300--D
6. Mount square key in the wheel motor shaft, then
install the wheel hub onto the wheel motor shaft.
IMPORTANT: Do not reuse lock nut that secures
wheel hub to wheel motor after it has been removed.
7. Install new lock nut (item 17) onto the wheel motor
shaft to secure wheel hub to motor shaft.
8. Install brake drum.
9. Position brake cable end to brake actuator lever. Se-
cure cable to actuator lever with clevis pin and return
spring.
10.Install front wheel assembly (see Wheel Installation
in this section).
11. Check and adjust brakes.
12.Lower machine to ground.
13.Torque lug nuts evenly in a crossing pattern from 70
to 90 ft- -lb (95 to 122 N- -m). Torque lock nut (item 17)
that secures wheel hub from 315 to 385 ft- -lb (427 to
521 N- -m).
After servicing the brakes, always check the
brakes in a wide open, level area that is free of
other persons and obstructions.
10
5
9
6
7
8
1. Backing plate
2. Rivet (4 used)
3. Clevis pin
4. Retaining ring
5. Brake shoe
6. Lower shoe spring
7. Hold down spring
Page 6 - - 9
CAUTION
13
12
11
2
3
4
5
Figure 7
8. Hold down cup
9. Upper shoe spring
10. Brake actuator
11. Actuator lever
12. Back- -up plate
13. Boot
14. Hold down pin
Chassis
14
14
1