WORM SHAFT ASSEMBLY MAINTENANCE -820360369

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)

WORM SHAFT ASSEMBLY MAINTENANCE

REMOVAL, CLEANING, REPAIR OR REPLACEMENT, INSTALLATION

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)

Torque wrench adapter (item 18, WP 0149 00)

Materials/Parts

Grease (item 15, WP 0152 00)

Lock wire (item 21, WP 0152 00)

Sealing compound (item 13, WP 0152 00)

Solvent cleaning compound (item 12, WP 0152 00)

Wiping rag (item 18, WP 0152 00)

References

WP 0123 00

Equipment Conditions

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

REMOVAL

WARNING

RADIATION

TRITIUM

GAS (H3)

When maintaining radioactively illuminated fire control equipment, follow radiation

hazard procedures in warning summary.

WARNING

When maintaining battery illuminated fire control equipment follow battery

warnings in warning summary.

NOTE

The following procedures are applicable to both the elevating and cross level worm

shafts.

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