TM 9-1375-213-12
b. Securing an M81 Igniter to the relay cap's shock tube:
NOTE
For shock tube relay connections such as
(1) Turn the M81 end cap 1/2 turn counterclockwise
those in this procedure, "J" hook/detonating
so that the shipping plug may be easily removed and pull
tube on the free end of the M11, M16 caps
the smaller shipping plug out of the igniter. Dispose of the
may be slid down the shock tube out of the
plug in accordance with applicable regulations.
way to facilitate the connections. The "J"
hook/detonating tube is used primarily for
(2) Cut off the crimped/sealed end of the relay cap's
connection of the M11, M16 to detonating
shock tube and push it into the hole in the M81's end cap
cord.
as far as it will go. Twist the shock tube a little to assure it
goes into the smaller of the igniter's internal clutching de-
For detonating cord relay connections such as
vices. Once the shock tube has seated, turn the igniter's
those in this procedure, "J" hook/detonating
end cap clockwise finger-tight to secure it in the device.
cord on the free end of the M151 and M152
Hold the igniter securely and pull lightly on the shock tube
boosters may be slid down the shock tube out
to assure the shock tube is secure.
of the way to facilitate the connection.
(3) Assure that all friendly personnel are at a safe
(5) Unreel the relay cap's shock tube to or toward
distance or under cover appropriate to their distance from
the site from which the detonation will be initiated.
(6) If another relay cap is being used, secure the free
(4) Squeeze the spread legs of the safety cotter pin
end of the first cap's shock tube in the plastic holder on the
together. Use the safety pin's cord to remove it from the
detonator of the second as in step 4. above. If only one
igniter's body.
shock tube is being inserted in the holder, loop the free end
of the shock tube around so it passes through the holder
twice. This will hold it in better contact with the detonator.
WARNING
WARNING
TURE ON FUNCTIONING.
WEAR
LEATHER GLOVE ON HAND HOLD-
ALL FRIENDLY PERSONNEL WILL
ING IGNITER AND AVERT EYES
MOVE TO A SAFE DISTANCE OR
WHILE ITEM FUNCTIONS.
TAKE APPROPRIATE COVER.
WEAR HEARING PROTECTION AP-
PROPRIATE TO CHARGE BEING
(5) Put a leather or leather-palmed glove on the hand
USED.
that will hold the igniter during its actuation and grasp the
igniter body firmly with the pull ring fully accessible to
your other hand.
NOTE
Leftover sections of shock tube may be cut off
WARNING
and spliced to other caps' shock tube. The
NEVER GRASP IGNITER OVER CON-
NECTION END.
IF SHOCK TUBE
followed.
BLOWS OUT OF M81 HOUSING, POS-
Expended shock tube must be removed from
SIBLE SKIN BURNS CAN OCCUR.
spool to turn in to ASP.
(6) To fire the charge(s), sharply pull the igniter's
(7) After the relay cap(s) has(have) been laid out all
pull ring to actuate the igniter. The pop of the igniter's
the way to the site from where the detonation is to be initi-
primer should be heard.
ated, assure all friendly personnel are moved to a safe dis-
tance from the charge(s) at this time. Secure the initiating
element to the shock tube of the relay cap at the site (or near
it if other than an M81 Igniter is used) as described.
2-4.2
Change 21