Handcarry and Backpack Systems

TM 3-6665-225-12

(7) Pull cargo shelf into horizontal position.

(10) Press in one binding post (3) of M43

(8) Perform procedures of para 2-9 a through

detector unit and, disregarding polarity, insert

one wire of each telephone cable into binding post

(9) Place rucksack in an upright position.

slot. Release binding post.

(10) Position M43 detector unit (1, fig. 3-5)

(11 ) Repeat (10) above for other binding post

with attached BA3517/U battery (2) on cargo

and remaining wires.

shelf (3) so that AIR FILTER plug (4, fig. 2-4) is

(12) Perform startup and operation proce-

facing away from frame of rucksack (5, fig. 3-5).

dures (para 2-9).

CAUTION

3-3. Handcarry and Backpack Systems

Do not block AIR OUTLET.

a. Handy carrying the M43 Detector Unit. T'he

(11) Tie long web strap (4) to right end of

M43 detector unit when handcarried on an opera-

middle bar of rucksack (5). Pass strap across M43

tional mission uses a BA3517/U battery for a

detector unit and attached battery. Turn strap

power source. The BA3517/U battery is secured

fastener loop (6) upward on left side of M43

to the M43 detector unit allowing both units to be

detector unit. Insert long web strap through loop.

transported by the handle of the M43 detector

Pull it until tight.

unit. The M42 alarm unit supplied with the hand-

(12) Pass free end of long web strap around

carry configuration permits the system to be used

top bar, through slot, and pull it tight. Tie free

as a fixed emplacement installation with one

end in overhand knot while maintaining tension.

remotely-located M42 alarm unit.

CAUTION

(1) Perform procedures of paragraph

Do not block AIR OUTLET.

3-2a (1) through (3).

(13) Pass long web strap (4) which is tied to

(2) If M42 alarm unit is to be used, perform

left end of middle bar of rucksack across M43

procedures of paragraph 3-2 d (3) through (6) and

detector unit and battery. Insert this long web

(8) through (10).

strap through strap fastener loop (6) on right side

(3) Perform startup and operation proce-

of M43 detector unit. Keep the long web strap flat

dures (para 2-9).

and pull it downward until tight. Then pass its

b. Backpacking the M43 Detector Unit. T h e

free end around itself and pull it tight.

M43 detector when operated in the backpack

(14) Tighten straps to insure that M43

configuration uses a BA3517/U battery for a

detector unit and BA3517/U battery are securely

power source. The M43 detector unit and

fastened to rucksack.

BA3517/U battery are secured to a rucksack with

(15) Perform the procedures of paragraph

a cargo shelf. The M42 alarm unit supplied with

2-9 r through x.

the backpack configuration permits the system to

be used as a fixed emplacement installation with

3-4. Vehicular System Installations

one remote-located M42 alarm unit.

Vehicular system installations provide accom-

(1) Perform applicable preoperation pro-

modations for an M43 detector unit, and M42

cedures (para 2-6) and pre-startup procedure

alarm unit, and a BA3517/U battery. Primary

(para 2-7).

power to operate the equipment is supplied by the

(2) Position cargo shelf (4, fig. 3-4) on the

vehicle's electrical system. T h e B A 3 5 1 7 / U

rucksack (2).

battery provides power when the M43 detector

(3) Pass short web strap (1) around top and

unit is removed from the vehicle and handcarried.

middle bars of rucksack so that strap is centered

a. General.

between right and left sides of rucksack. The

(1) The M11 alarm system is installed on a

buckle of short web strap must be on load side of

one-quarter-ton utility truck (fig. 3-6). The M43

rucksack and not more than 4 inches from middle

detector unit is installed and connected to a high

bar. Insert plain end of short web strap through

profile mount on the right-front fender of the

buckle. Tighten short web strap as taut as possi-

vehicle. The M42 alarm unit is installed on the

ble.

dash panel.

(4) Tie one end of a long web strap (3) to

(2) The M12 alarm system is installed on a

right end of middle bar of rucksack using a non-

three-quarter-ton truck (fig. 3-7). The M43

slip knot.

detector unit is installed and connected to a high

(5) Tie one end of other long web strap to left

profile mount on the right-front fender of the

end of middle bar of rucksack using a non-slip

vehicle. The M42 alarm unit is installed on the

knot.

right scuff plate in the cab, and a drawer of refill

(6) Pass free ends of long web straps through

kit components is secured to the upright below

adjacent outer slots of cargo shelf (4).

3-5