ADB F-Range L-850C Manual page 51

F-Range Type L-850C Style 3 Inset Lights
8. Closing Optical Unit
(contd.)
 2006 ADB Airfield Solutions, Incorporated
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2. Make sure that the contact surfaces with the O-ring (1) are clean
and apply a light coat of high quality neutral silicone grease.
3. Install a new greased O-ring (1) in the groove located in the top
cover.
NOTE: Use a synthetic grease such as MOLYKOTE (67A0095)
BG87 INERTA or MOLYKOTE (67A0095) BG88 INERTA.
4. See Figure 6-1. Remove the pressure release screw (E11).
5. See Figure 6-13. Install the inner cover (8) on top of the
cover (2).
NOTE: Align the inner pan mounting holes on the top cover
holes.
6. Make sure the lampholder (6) and lamp (5) are correctly
positioned and that the wires of the lamps do not get damaged
between both parts (cover and inner cover).
7. Press the inner cover of the inner pan assembly on the top cover
and secure with the countersunk screws (9). Apply a droplet of
Loctite 222 to the last threads. Torque screws to 22 4 inch-
pounds (2.5 0.5 Nt-m).
8. Check the watertightness of the assembly by replacing the
pressure release screw with a pressure test fixture. The leak path
can then be located by submerging the assembly in a tank of
water while pressurizing using shop air pressure to a maximum
of 20 psi. Refer to Testing for Leaks in the Maintenance section.
9. Make sure the O-ring seal for the pressure release screw is in
good condition and reinstall the pressure release screw.
96A0285D
Issued 04/13
Repair
Page 6-18