TM-9-2350-275-BD

M113 FAMILY CARRIER, PERSONNEL SELF-PROPELLED FULL-TRACKED

TECHNICAL MANUAL; OPERATORS, ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; BATTLEFIELD DAMAGE ASSESSMENT AND REPAIR

TM-9-2350-275-BD - Page 135 of 223

TM 9-2350-275-BD

COMMUNICATIONS SYSTEM

Personnel/Time Required

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1 soldier

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1 hour

Materials/Tools

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Wire, 4-conductor, 18-gauge 5-foot length or cable, telephone, WD-1/TT, 5-foot

length, (two required) (cut back three steel strands of the two sections)

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Connector, UG-273

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Handset, H-189/GR, or standard CVC helmet

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Plate, Soviet chest

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Transceiver, Soviet, R-123M (with power supply)

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Wire, 2-conductor, 12-gauge (minimum size), 3-foot length

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Rope, lo-foot length

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Gun, soldering

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Solder, rosin-core

Other Options

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Substitute radio with

1. Foreign Allied equipment (Refer to para. 11-27).

2. Foreign AN/VRC-12 series equipment. (Refer to para. 11-25.)

Procedural Steps:

NOTE

The AN/VIC-1 intercom should not have the R-123M wired

through it. For proper operation of the intercom while the

R-123M is being used, set the INSTALLATION SWITCH on

the AM-1780 to INT ONLY position.

1. Locate the power cable that runs from the turret wall to connection J-21 on the

bottom of MT-1029. Remove the cable from the J-21 connection. Without removing

the connector from the cable, strip back and remove approximate y four inches of the

outer insulation.

Stagger the splices, and scrape approximate y 1/4 to l/2-inch of the

inner insulation off each of the four wires in the cable.

2. Use a jumper cable of at least 12-gauge wire, and attach troth the red and the white

wires in this power cable to the positive side of the Soviet power supply.

(Point A.)

3. Use another jumper cable of at least 12-gauge wire, and attach both the black and

the green wires in this power cable to the negative side of the power supply. (Point B.)

11-29