DISASSEMBLY - Continued
Remove and discard gasket (24) from electrical bracket (23) (M137A2/M137A3 only).
Remove two machine screws (25) from electrical bracket (23) and remove electrical bracket from elbow
of panoramic telescope (4) (M137A2/M137A3 only).
Clean all parts per TM 9-254.
REPAIR OR REPLACEMENT
Repair is by replacement of authorized parts that do not meet inspection criteria. Refer to WP 0132 00
and WP 0133 00.
Stamp M137/M137A2/M137A3 panoramic telescope serial number on new identification plate.
When maintaining radioactively illuminated fire control equipment, follow radiation
hazard procedures in warning summary (M137 only).
Support azimuth knob assembly in V block on solid surface to prevent damage to
Install knob assembly (1) on panoramic telescope (2) and secure with headless straight pin (3).
Install optical eyeshield (4) on panoramic telescope (2).
Use sealing compound in well-ventilated area away from open flame. Sealing
compound is harmful to skin and clothing and may give off harmful vapor. Exercise
care whenever sealing compound is used.
If removed, apply sealing compound (item 13, WP 0152 00) to threads of two machine screws (5) (M137
If removed, install identification plate (6) on side of counter box of panoramic telescope (2) and secure
with two new lockwashers (7) (item 11, WP 0133 00) and two machine screws (5) (M137 only).