(d) Secure blasting cap or time fuse into cou-
pling body as desire (c above).
(e) Assure safety pin is in place. Screw cou-
pling body into switch.
Removal of the safety pin is the final
step in all operating modes. If the
safety pin is inadvertently removed
prior to step (g) stop all procedures and
(f) Attach charge, etc. to coupling body as
The pressure plate must not be heavy
enough to activate switch by itself', The
maximum allowable weight is 9 pounds.
(g) Place pressure plate to rest on Sear Plate.
This should make the square-head pin easy to
move. DO NOT REMOVE IT.
removal. Assure legs of safety pin are straight.
If legs are bent, straighten and press them
ttogether with pliers.
The instruction sheet packed with the
(b) Obtain a piece of wood or some other suit-
M142 states that it can be -preloaded
able object to act as a pressure plate, max
with up to 25 pounds in the pressure
weight less than 9 pounds (see warning step (g)
mode. THIS IS AN ERROR. THE
MAXIMUM ALLOWABLE PRELOAD
(c) Secure switch
to a fixed object
IS 9 POUNDS.
Figure 2-38. Position
of firing device