Replacing A Light Bar Base - Federal Signal Corporation Legend LGD Installation, Operation And Service Manual

Maintaining and Servicing the Legend
Reinstalling the Domes
To reinstall a dome:
1. Place the dome over the ROC panel, ensuring that it is properly seated in the
lip seal.
DO NOT OVERTIGHTEN: To prevent damage to the light bar, do not
overtighten the screws or nuts.
2. To prevent cross-threading, turn the barrel nuts counterclockwise until you hear
a click, then tighten them.

Replacing a Light Bar Base

The light bar's bases secure and protect the LED circuit boards and controller.
Regularly inspect them for loose hardware, cracks and weather-tightness. For
replacement parts, see Table 15 on page 51.
To replace a base:
1. Remove the domes and ground connection.
a. Remove the light bar's domes as described in "Removing and Inspecting the
b. Invert the PCB and remove the 5/16-inch hex bolt and ground wire from the
c. Note and record the connections, and then disconnect the wires and harnesses.
d. Remove the base retainer screw and the cable clamp on the cable entry side.
2. Remove the base.
• If the light bar is on the vehicle: Slide the base from the aluminum extrusion,
catching the carriage bolts as they are freed from the channels.
• If the light bar is off the vehicle: Invert the light bar on soft rags or
cardboard to protect the domes, then slide the base from the aluminum
extrusion. The carriage bolts can then be removed from base
40
Domes" on page 39.
aluminum extrusion.
Legend LGD and Legend LPX Light Bars
Federal Signal www.fedsig.com