COUNTER ASSEMBLY MAINTENANCE REMOVAL, DISASSEMBLY, CLEANING, REPAIR OR REPLACEMENT, ASSEMBLY, INSTALLATION

TM 9-1240-375-34&P

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GENERAL SUPPORT

M17/M18 AND M17A1/M18A1 FIRE CONTROL QUADRANT

(1290-01-037-3883/1290-01-037-7289 AND 1290-01-515-8260/1290-01-515-8262)

COUNTER ASSEMBLY MAINTENANCE

REMOVAL, DISASSEMBLY, CLEANING, REPAIR OR REPLACEMENT, ASSEMBLY, 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 15, WP 0149 00)

Materials/Parts

Grease (item 16, WP 0152 00)

Lockwasher (3) (item 19, WP 0112 00)

Lockwasher (4) (item 19, WP 0115 00)

Sealing compound (item 13, WP 0152 00)

Solvent cleaning compound (item 12, WP 0152 00)

Spring pin (item 8, WP 0115 00)

Wiping rag (item 18, WP 0152 00)

References

WP 0049 00

Equipment Conditions

Cover assembly removed (WP 0049 00, WP 0050 00)

Correction knob assembly removed (WP 0049 00, WP 0050 00)

REMOVAL

WARNING

RADIATION

TRITIUM

GAS (H3)

When maintaining radioactively illuminated fire control equipment, follow radiation

hazard procedures in warning summary.

NOTE

General support maintenance instructions for the M18/M18A1 quadrant counter

assembly are identical to those for the M17/M17A1 quadrant counter assembly.

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