TM-9-2330-238-14

CHASSIS, SEMITRAILER: 6-TON, 4-WHEEL M295A1; SEMITRAILER, VAN: EXPANSIBLE, 6-TON, 4-WHEEL M313; SEMITRAILER, VAN: SHOP, FOLDING SIDES, 6-TON, 4-WHEEL M447 AND M447C; SEMITRAILER, VAN: REPAIR PARTS, SHOP EQUIPMENT, 6-TON, 4-WHEEL M749; SEMITRAILER, VAN: REPAIR PARTS STORAGE, 6-TON, 4-WHEEL M750

TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL

JULY 1992

TM-9-2330-238-14 - Page 128 of 462

TM 9-2330-238-14

4-22. DOOR-OPERATED BLACKOUT SWITCHES REPLACEMENT

This Task Covers:

a.

Removal

b.

Installation

lnitia/ Setup:

Equipment Conditions:

●

External power supply cable disconnected.

Tools/Test

Equipment:

●

General mechanic’s tool kit

Materials/Parts:

●

Marker tags (Item 15, Appendix E)

NOTE

Replacement of all model door-operated blackout switches is similar. M447, M447C,

M750, and early model M313 are illustrated.

I

a.

REMOVAL

NOTE

●

Ensure that 220-volt main switch located in junction box is in OFF position.

●

Mounting screws for switch cover may vary between two and four for M447, M447C,

M750, early model M313, and M749, serial numbers V001 through V356 vans. On

M749, serial numbers V549 through V628, there are eleven mounting screws.

1.

2.

3.

4.

Remove screws and disconnect electrical leads

(5) from terminal board. Tag electrical leads.

Disconnect electrical leads (5) from switch termi-

nals (6). Tag electrical leads.

Remove switch (4) from switch cover (2).

M447, M447C, M750, AND M313 (EARLY MODEL)

TA701945

4-30