Inspect The Service Brake - Taylor-Dunn SS-025-34 Operation, Maintenance, 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. 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 auto adjust brakes cannot be manualy
adjusted.
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 brakes are asbestos free.
®
However, there is the 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.
Inspecting the
Mechanism
1. Make sure the start switch is in the "OFF"
position, then remove the key.
2. Place the forward-reverse switch in the center
"OFF" position.
3. Set the park brake.
4. Place blocks under the front wheels to prevent
vehicle movement.
5. Disconnect the battery.
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
Auto-Adjust Brake
Brake Service
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