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DISASSEMBLY - continued -820360507
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TM-9-1240-375-34-P Quadrant Fire Control: M17 (1290-01-037-3883) and M17A1 (1290-01-515-8260); Mount Telescope and Quadrant: M171 (1240-01-039-7273) Manual
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ASSEMBLY -820360509
TM 9-1240-375-34&P
0084 00
DISASSEMBLY - Continued
9.
Remove and discard gasket (24) from electrical bracket (23) (M137A2/M137A3 only).
10.
Remove two machine screws (25) from electrical bracket (23) and remove electrical bracket from elbow
of panoramic telescope (4) (M137A2/M137A3 only).
CLEANING
Clean all parts per TM 9-254.
REPAIR OR REPLACEMENT
1.
Repair is by replacement of authorized parts that do not meet inspection criteria. Refer to WP 0132 00
2.
Stamp M137/M137A2/M137A3 panoramic telescope serial number on new identification plate.
ASSEMBLY
WARNING
TRITIUM
GAS (H3)
When maintaining radioactively illuminated fire control equipment, follow radiation
hazard procedures in warning summary (M137 only).
CAUTION
Support azimuth knob assembly in V block on solid surface to prevent damage to
worm shaft.
1.
Install knob assembly (1) on panoramic telescope (2) and secure with headless straight pin (3).
2.
Install optical eyeshield (4) on panoramic telescope (2).
WARNING
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.
3.
If removed, apply sealing compound (item 13, WP 0152 00) to threads of two machine screws (5) (M137
only).
4.
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).
0084 00-4

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