Troubleshooting; Brake Adjustment; Brake Test - Taylor-Dunn TT-316-36 Service And Replacement Parts Manual

TT-316-36

Troubleshooting

WARNING
This section is one section of a complete service
manual. Before starting any procedure, read all
warnings and instructions that are located in the
Service Guidelines chapter.
Not Releasing:
• Voltage at brake too low
• Air gap too large
• Friction disc worn
• Faulty magnet coil
• Faulty wiring
Not Holding:
• Faulty brake switch
• Faulty controller
• Contaminated brake
Braking while driving:
• Faulty wiring to the brake coil
• Faulty brake coil

Brake Adjustment

Measure the air gap between the magnet coil and the
pressure plate. The air gap should be approximately 0.010 - 0.012 inches (0.25 - 0.30 mm).
1: Remove the brake assembly from the motor.
2: Loosen the assembly screws.
3: Turn each adjusting screw in or out as required. Each screw must be turned the same amount.
4: Tighten the assembly screws and check the air gap in several places around the brake.
5: Repeat as needed until within specification.
6: Tighten assembly screws to torque listed in the Hardware Torque table at the end of this section.
7: Reinstall the brake on the motor. Brake mounted on end of motor

Brake Test

1: Unplug the motor brake from the vehicle harness.
2: Connect a 24 volt, 5 Amp DC power supply to the brake and measure the current to the brake coil.
3: The brake should release and the current to the coil should be about 1.8 Amps.
Test Results:
Result
Brake Releases, Normal Current
Brake Releases, High Current
Brake does not release, high current
Brake does not release, normal current
Brake does not release, low or zero current
MT-316-06
Possible Cause
• Brake is good
• Brake coil shorted
• Brake coil shorted
• Needs adjusting
• Friction disc worn out
• Mechanical fault
•Brake coil open
Brakes
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