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6 Repair
6.1 Cover Lenses
Cover lenses are replaced as follows:
1. Locate the four metal clips located at the edges of the lens.
2. Remove the screw from each of the four clips.
3. Lift the lens out of the head cover.
4. Install the new lens in the head cover.
5. Install the four metal clips at the edges of the lens.
6.2 Fuses
The HBM 150/2 has a lamp fuse, and a motor fuse. The fuses are located on the
Control Panel, directly inside the door of the chassis.
6.3 Timing Belt
To replace the timing belt:
1. Disconnect and lock out power to the beacon.
2. Disconnect the two lamp wires from the control panel. Refer to Section 7
for the wiring diagram.
3. Loosen the four screws on the motor, with a 5/32" Allen wrench and 3/8"
wrench.
4. Slide the motor to the right and remove the old belt.
5. Install the new belt.
6. Tighten the belt by sliding the motor to the left. The belt should have 1/8"
deflection. Do not over tighten the belt.
7. Reconnect the two lamp wires to the control panel.
8. Reconnect power to the beacon.
6.4 Mercotac rotary electrical connector
Perform the following steps to replace the mercotac rotary electrical
connector:
1. Disconnect and lock out power to the beacon.
2. Disconnect the two lamp wires from the control panel. Refer to Section 7
for the wiring diagram.
3. Remove the two wires from the bottom of the coupling.
4. Loosen the cap screw in torque arm, and remove the torque arm.
5. Loosen the setscrew in the bottom of the main shaft, and remove the
mercotac rotary electrical connector.
14
HBM 150/2 Installation and Maintenance Manual
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