Removing L-868 Base Water; Lifting Optical Unit Out Of Base - ADB F-Range L-850C Manual

F-Range Type L-850C Style 3 Inset Lights

Removing L-868 Base Water

Lifting Optical Unit Out of
Base
 2006 ADB Airfield Solutions, Incorporated
All rights reserved
Turn off the circuit when checking water level.
Check the water level in the L-868 base on a regular schedule. If
more than six inches (152.4 mm) of water in the light base is found,
pump the water from the base and remove and inspect the entire
light assembly for water damage. Cover the L-868 base with the
appropriate steel cover plate after removing the light assembly.
Water entering the L-868 base can become a serious problem,
since freezing water can rupture the base.
To lift the optical unit from the light base, perform the following
procedure:
1. Remove the six fixing screws and washers or self locking nuts.
2. Fit the appropriate lifting tool into both holes located (180°
apart) in the cover, lift the optical unit out of the base and place
the optical unit next to the base.
3. Disconnect the light fixture wires from the power wires coming
from the transformer(s).
4. Mount a serviced or new light fixture as described in Installation
on L-868 Base in the Installation section.
NOTE: Torque the six screws to 20.902  0.565 Nt-m (185 5
inch-pounds).
5. Take the inset fixture unit back to the maintenance base where it
can be serviced entirely.
Never hold the light fixture by the wires. This may damage
the insulation, break the waterproof seal, and cause insulation
faults and water leakage.
96A0285D
Issued 04/13
Maintenance
Page 4-4