Brake Service - Toro Workman 3000 Series Service Manual

Brake Service

6
1. Upper spring
2. Adjuster spring
3. Lower spring
4. Hold down washer
5. Hold down spring
Worn or misadjusted brakes may result in
personal injury. If brake pedal travels to with-
� (38 mm) of the vehicle floor board, the
1
in 1 /
2
brakes must be adjusted or repaired.
1. Partially loosen wheel lug nuts then jack up and sup-
port vehicle. Remove lug nuts then remove wheel.
NOTE: It may be necessary to back off adjuster to re-
move brake drum. To back off adjuster, rotate brake
drum until access hole lines up with star wheel (Fig. 10).
Use a hooked piece of wire to pull pawl away from star
wheel, then turn star wheel.
2. Remove brake drum.
3. If servicing front brakes, remove wheel hub (see
Front Wheel Bearing Service). If servicing rear brakes,
remove stub axle (See Chapter 6 – Drive Train).
Steering, Brakes and Suspension
7
6. Hold down pin
7. Brake shoe and lining
8. Pawl
9. Brake shoe and lining
10. Adjuster assembly
CAUTION
13
11
12
10
Star wheel
8
2
5
4
Figure 9
Brake Drum Inspection
1. Any time brake drums are removed for brake service,
braking surface diameter should be checked with a suit-
able micrometer at several points to determine if they
are within the safe oversize limit cast into the brake drum
outer surface. If braking surface diameter exceeds
specifications, the drum must be replaced. If braking
surface diameter is within specifications, drums should
be cleaned and inspected for cracks, scores, deep
grooves, taper, out of round and head spotting. If drums
are cracked or heat spotted, they must be replaced.
2. Remove minor scores with sandpaper. Grooves and
large scores can only be removed by machining with
special equipment, as long as the braking surface is
within specifications, stamped on brake drum outer sur-
face. Any brake drum sufficiently out of round to cause
vehicle vibration or noise while braking, or showing ta-
per should also be machined, removing only enough
stock to true up the brake drum.
Page 7 – 12
9
1
3
11. Parking brake lever
12. Wheel cylinder
13. Backing plate
Workman 3000 Series