OPTICAL INSTRUMENT ROCKER MAINTENANCE

TM 9-1240-375-34&P

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GENERAL SUPPORT

M171/M171A1 TELESCOPE AND QUADRANT MOUNT

(1240-01-039-7273/1240-01-515-8265)

OPTICAL INSTRUMENT ROCKER MAINTENANCE

DISASSEMBLY, REPAIR OR REPLACEMENT, ASSEMBLY

INITIAL SETUP:

Tools and Special Tools

Shop Set, Instrument and Fire Control: Field Maintenance, Basic Less Power (SC 4931-95-A07)

Tool Kit, Electronic System Maintenance (SC 5180-95-B29)

References

WP 0122 00

Equipment Conditions

M171/M171A1 mount removed from M198/M777 howitzer (TM 9-1025-211-34/TM 9-1025-215-25&P)

Cross level knob and worm shaft assembly removed (WP 0065 00)

DISASSEMBLY

WARNING

RADIATION

TRITIUM

GAS (H3)

When maintaining radioactively illuminated fire control equipment, follow radiation

hazard procedures in warning summary.

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