COUNTER BOX ASSEMBLY MAINTENANCE

TM 9-1240-375-34&P

0090 00

DIRECT SUPPORT

M137/M137A2/M137A3 PANORAMIC TELESCOPE

(1240-01-038-0531/1240-01-483-6103/1240-01-483-6100)

COUNTER BOX ASSEMBLY MAINTENANCE

DISASSEMBLY, CLEANING, 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)

Materials/Parts

Adhesive (item 2, WP 0152 00)

Lockwasher (4) (item 15, WP 0141 00)

Lockwasher (2) (item 33, WP 0141 00)

Lockwasher (2) (item 36, WP 0141 00)

Lockwasher (5) (item 42, WP 0141 00)

Sealing compound (item 13, WP 0152 00)

Soap (item 19, WP 0152 00)

References

TM 9-254

Equipment Conditions

Counter box assembly partially disassembled (WP 0084 00)

DISASSEMBLY

WARNING

RADIATION

TRITIUM

GAS (H3)

When maintaining radioactively illuminated fire control equipment, follow radiation

hazard procedures in warning summary (M137 only).

NOTE

Charge nitrogen pressure to 7 psi (0.49 kg/cm2). Remove hose. Put soap suds (item

19, WP 0152 00) on valve opening to check for leakage. If valve leaks, replace valve

stem and/or valve core.

0090 00-1