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6. Remove the two wires from the top of the mercotac rotary electrical
connector.
7. Place the black wire on the center tab of the new mercotac rotary
electrical connector, and place the white wire on the outer tab of the new
mercotac rotary electrical connector.
8. Reinsert the mercotac rotary electrical connector in the shaft, and tighten
the setscrew. (NOTE: Do not over tighten.)
9. Reinstall the torque arm, and tighten the cap screw. (NOTE: Do not over
tighten.)
10. Place the black wire on the center tab of the mercotac rotary electrical
connector, and the white wire on outer tab of the mercotac rotary electrical
connector.
11. Connect the two wires to the control panel. Make sure they are connected
to the original terminals. (NOTE: The black wire connects to the upper
terminal, and white wire connects to the lower terminal.)
12. Reconnect power to the beacon.
13. The Mercotac rotary electrical connector contains a small amount of
mercury. It should be returned to the manufacturer for recycling, using the
form located at the back of this manual.
6.5 Lamp Ballast
To replace a lamp ballast, perform the following steps:
1. Disconnect and lock out power to beacon.
2. Open the cabinet door.
3. Refer to the wiring diagrams in Section 7 to locate the connections.
Disconnect the ballast input power leads at the terminal block.
4. Remove the ballast output wires at the terminal block.
5. Remove the two ¼-20 bolts and nuts attaching the ballast assembly to the
main shaft, and remove the old ballast.
6. Place the new ballast into position on the main shaft.
7. Replace the two ¼-20 bolts to attach the ballast assembly to the main
shaft.
8. Reconnect the ballast input power wires to the terminal block. (NOTE:
Black wire on terminal labeled , and white wire on terminal labeled N.)
9. Reconnect the ballast output wires to the terminal block.
10. Reconnect the power to the beacon.
6.6 Motor and Gearhead
1. Disconnect and lock out power to the beacon.
2. Refer to the wiring diagrams in Section 7 for component connections.
3. Loosen the four cap screws that hold the motor in place, and slide the
motor to the right.
4. Remove the timing belt.
HBM 150/2 Installation and Maintenance Manual
15
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