TM 9-1240 400-34&P
MAINTENANCE OF EXTENSION LIGHT ASSEMBLY (CONT).
Extension light can be disassembled while installed on M137 telescope mount upper assembly housing.
Remove optic cell assembly adapter (1) from light extension (2).
Remove light assembly (3) from light extension (2).
Clean all parts per TM 9-254.
Repair is by replacement of authorized parts as required. Refer to appendix B.
Install light assembly (3) in light extension (2).
Apply sealant adhesive (item 5, appx C) to base of optic cell assembly.
Install optic cell assembly (1) to light extension (2).