Inspect The Service Brake; Auto-Adjust Brake Mechanism Operation; Inspecting The Auto-Adjust Brake Mechanism - Taylor-Dunn SC-090-24 Operation, T Roubleshooting And Replacement Parts Manual

INSPECT THE SERVICE BRAKE

Auto-Adjust Brake Mechanism Operation

The auto-adjust mechanism is located on the bottom
of the brake assembly and accessible through the
oval slot in the brake drum. As the brake pad material
wears down, the distance the brake shoes travel
to engage the brake drum becomes longer. When
the travel becomes long enough, the brake lever
engages the auto-adjust lever and causes it to index
a tooth on the star wheel adjuster. This rotates the
adjuster, which decreases the travel needed for the
brake shoes to engage the brake drum.
Note: The only time the brakes should be manually
adjusted is when an internal component of the
braking system has been removed.
Note: The brakes will not require manual adjustment
if any part of the external mechanical linkages
or cables have been removed.
Note: The symptom of a low brake pedal may indicate
that the auto adjuster is not working or the brake
cable is not adjusted properly. Remove the
vehicle from service and repair the brakes.
Note: The brake adjustment is inside of the left
and right brake. Do not adjust the brake by
means of the brake cables as this will cause
misoperation of the brakes. If you hear a single
"clunking" noise while braking it may be due to
misadjustment of the brake cables or linkage.
Refer to Replace Brake linkages/Cables for
information regarding proper adjustment of the
cables and linkages.
Adjusting the brakes by means of the brake
cables could cause a hard brake pedal with
little or no braking power. This could cause
loss of control of the vehicle resulting
in severe bodily injury and /or property
damage.
Maintenance, Service, and Repair
Current Taylor-Dunn
®
possibility that the original brakes were replaced with aftermarket
parts containing asbestos. Since this possibility exists, all brake parts
should be handled as if they contain asbestos. Refer to appendix C
for recommended handling precautions.
brakes are asbestos free. However, there is the

Inspecting the Auto-Adjust Brake Mechanism

1. Make sure the key-switch is in the "OFF"
position, then remove the key.
2. Place the forward-reverse switch in the
center "OFF" position.
3. Confirm the electric park brake is set.
4. Place blocks under the front wheels to
prevent vehicle movement.
5. Disconnect the main positive and
negative cables at the batteries.
Always use a lifting strap, hoist, and jack
stands, of adequate capacity to lift and
support the vehicle. Failure to use lifting
and support devices of rated load capacity
may result in severe bodily injury.
6. Raise the rear of the vehicle and support with jack
stands.
7. Using the appropriate procedure, remove the brake
drum.
8. Release the park brake.
9. Back off the auto adjuster star wheel one or two
turns.
10. Reinstall the brake drum and depress the bake
pedal.
11. As the brake pedal is depressed, the auto adjuster
indexes the star wheel adjuster causing a click.
12. Lower the vehicle.
13. Reconnect the main positive and negative at the
batteries.
14. Remove the blocks from behind the wheels.
15. Test drive the vehicle
Brake Service
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