TM 9-1375-213-12
tor) should be evacuated from the area prior
operation (fig. 2-42), the firing device functions when
to pulling the safety pin.
the tension of the tripwire is relieved when the trip-
(k) Using a lanyard (length of wire or cord) to re-
wire is cut. Setting instructions are as follows:
(a) Assure both round and squarehead pivot
move safety pin, take cover and pull the safety pin.
pins are in place, Check components to assure there
Leave the area.
are no obvious defects, Check safety pin for ease of re-
moval. Assure legs of safety pin are straight. If legs
are bent, straighten and press them together with pli-
ers.
screws.
(c) Secure blasting cap or time fuze into coup-
ling body as desired (c above),
(d) Assure safety pin is in place. Screw coupling
body into switch.
NOTE
Removal of the safety pin is the final step in
all operating modes. If the safety pin is inad-
vertently removed prior to step i, stop all
procedures and refer to disarming proce-
dures (e).
(e) Attach charge, etc. to coupling body as
desired.
(f) Layout tripwire. Direction should be perpen-
dicular to the longitudinal axis of the switch (i.e., pull-
ing up with respect to switch).
(g) Secure one end of tripwire to a tree, stake or
some other stationary object,
(h) Fit tension release attachment through trip-
wire hole (fig. 2-44) in sear plate.
WARNING
Assure tripwire is taut enough so as not to
accidently activate firing device.
e. Disarming Procedure, Resetting Procedure and
(i) Loop other end of tripwire through goose
Disposition of Material.
neck arm of tension release attachment, Adjust ten-
(1) Disarm procedure.
sion so that the goose neck arm of the tension release
attachment meets point X (fig. 2-44) and secure by
WARNING
twisting the free end of the tripwire around the taut
Disarming an armed firing device is con-
tripwire and the goose neck arm with pliers. This
sidered hazardous. All unnecessary person-
should make the round-head pin easy to move, DO
nel must leave the danger area during dis-
NOT REMOVE IT.
arming procedure. If in doubt as to condition
of firing device, leave danger area and ob-
WARNING
tain EOD personnel assistance.
If safety pin resists movement do not with-
The following is for disarming a firing device whit
draw. Firing pin may have been released re-
has not been actuated. If a device has been actuated or
check assembly. Disassemble and reset as ne-
is suspected to have been actuated, refer to misfire
cessary e(2).
procedure (f below).
(j) Assure safety pin is in place, but can easily
WARNING
be removed, DO NOT REMOVE SAFETY PIN. Re-
Do not disturb the firing device when per-
move round-head pin, Again check safety pin to assure
forming the following procedure.
firing pin was not released.
(a) If a time blasting fuse is being used, and
WARNING
accessible, carefully cut the fuse being certain not to
All personnel but the prime installer (opera-
disturb the firing device. Move the cut end of the fuse
Change 5
