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 TM 5-1940-277-20
TM 1940-20/2
REMOVE:
1.
Open control console access hatch (refer to paragraph 3-154).
2.
Fit 1/8 inch screwdriver into slot (1) in alarm body (2).
3.
Gently pry cap (3) off body.
All wires are still connected. Do not pull element out with jerk. It will break wires.
4.
Using fingers, lift alarm element (4) out of body (2).
Using 1/8 inch screwdriver, loosen three screws (5) holding element lead wires to terminal block (6).
5.
Pull wires out of terminal block and set element aside.
6.
Using 1/4 inch screwdriver and wrench, remove the two screws (7) and nuts (6) that hold body to console.
7.
Retain screws and nuts for use with new alarm.
8.
Dispose of old body, element and cap.
9.
INSTALL:
Fit 1/8 inch screwdriver into slot (1) of new alarm body (2).
1.
2.
Gently pry cap (3) off body.
Using fingers, lift alarm element (4) out of body (2).
3.
Cut alarm element (4) lead wires to 4 inches (100 mm) length.
4.
Strip about 1/4 inch of insulation from each lead wire.
5.
Feed terminal block (6) and connected wires through bottom of new alarm body (2).
6.
Connect alarm element (4) lead wires to terminal block (6).
7.
Red to Red.
Black to Black
Yellow to Center.
Using 1/8 inch screwdriver, tighten three screws (5) to hold alarm element lead wires to terminal block (6).
8.
NOTE
Alarm element is out of body for next step.
Put two screws (7) into holes in bottom of alarm body (2).
9.
10. Position alarm body (2) in console with screws through holes available.
11. Using 1/4 inch screwdriver, hold screws and put nuts (8) on with fingers. Do not tighten.
12. Position alarm feed wires in one of the gaps in alarm body bottom.
NOTE
Do not allow alarm element to hang up during next step. Element lead wires will be pulled
loose or broken
Pull alarm feed wires until terminal block (6) is at bottom of alarm body (2).
13.
Using 1/4 inch screwdriver and wrench, tighten two screws (7) and nuts (8).
14.
Carefully fit alarm element (4) into alarm body (2).
15.
16.
Fit cap (3) onto body.
Press cap (3) until it snaps in place.
17.
Check alarm function (refer to TM 5-1940-277-10).
18.
Close console access hatch (refer to paragraph 3-154).
19.
3-128
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