General Maintenance and Troubleshooting
3-6 SM 6495, Rev. 7, December 2008
The hold clear device (J070205-0438) is mounted on the left end of the gear motor (See Figure 3-1) in
the lower left corner of the gate mechanism. Before removing the hold clear device, secure the gate
arm and remove power from the gate mechanism. To remove the hold clear device, follow these steps.
1. Remove the white brake wires from terminals 1B and 4B on the circuit controller on 12-volt
systems and from terminals 2B and 4B on 24-volt systems.
2. Loosen two (2) Allen head screws on the armature. Slide the armature off of the output shaft of the
gear motor. Keep the key in place.
3. Remove four (4) Allen head screws securing the hold clear device to the gearmotor.
To replace the hold clear device, perform the removal procedure in reverse order. The air gap should
be measured and adjusted (if necessary) according to the following procedure.
1. Loosen the two (2) armature Allen head screws, using the Allen wrench (J052980-0014) included
in the Model 95 Tool Kit, so that the armature slides freely on the motor shaft (taking care not to
bend the armature springs when sliding).
2. Insert a 0.020” feeler gauge between the armature and the coil unit (preferably use two gauges and
insert one on each side of the shaft to assure that the armature does not cock sideways).
3. Tighten the two (2) Allen head screws.
4. Ensure the brake is operational.
The electrical test is as follows:
1. Open the gold nut on terminal 5B to lower gate arm.
2. Remove the white wire from terminal 1B on the 12-volt system and 2B on the 24-volt system.
3. Add a positive system voltage to this white wire from terminal 1B for 12-volt systems or from
terminal 2B for 24-volt systems.
4. Add a negative system voltage to terminal 4B.
5. Energize the brake armature with 12 Volts DC.
6. Reduce the voltage until 3 volts is reached. Continue reducing the voltage slowly until the brake
releases. Any partial disengagement of the brake is considered the release voltage (the motor shaft
must turn freely by hand for the brake to be released, the minimum release voltage is 1 VDC).
7. Reduce the voltage to 0 VDC. Open the circuit for 1 second. Gradually increase the voltage until
the armature picks up (armature must be fully engaged). The maximum pick-up voltage is 9 VDC.
8. Reconnect the brake wire to its terminal and tighten the gold nut.
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