adapter booster contains a 2.0-inch diameter
tail fuze. The T46 (series) contains a fuze
adapter sleeve for use with 1.5-inch diameter
MECHANICAL NOSE FUZING.When you
use mechanical nose fuzing, an M148 adapter booster is
installed as follows:
Unpack the adapter booster and remove the
Inspect the adapter booster internally and
externally to ensure all parts, including threads,
are clean and undamaged.
Inspect the bomb nose fuze cavity.
Loosen the setscrew in the bomb body.
Screw the adapter booster into the bomb, and
tighten it with a spanner wrench until it is
Tighten the setscrew in the bomb body against
the adapter-booster threads.
Installation of Electric and Electronic Tail Fuzes
The Mk 376/FMU-139 series electric and elec-
tronic tail fuzes are currently being used in the Navy.
The following are general procedures you should
follow when working with these fuzes. Refer to figure
13-5 for arming wire installation.
MK 376 ELECTRIC TAIL FUZE.Prepare,
inspect, and install the fuze as follows:
Ensure that the safety pin is installed in the
Remove shipping cap.
Ensure moisture or foreign material is not
present in the electrical connector at base of
With thumb, push in on pop-out pin; remove
safety pin from pop-out pin.
Ascertain if resistance from pop-out pin
against thumb is present.
Reinstall safety pin into pop-out pin.
Loosely install fuze-restraining clip on the
flange of the fuze.
Install fuze into tail fuze well, and tighten with
spanner wrench until flange is seated.
Align pop-out vertical with bomb lugs; tighten
Prepare, inspect, and install the fuze as follows:
Ensure that gag rod is secured by safety pin.
Verify that red and black striping is not visible
on gag rod sleeve.
SAFETY COTTER PIN
FUZE RESTRAINING CLIP
MUST BE INSTALLED, BUT
MAY NOT BE EXACTLY IN
Figure 13-5.Mk 376 and FMU-139 series electric/electronic fuze arming wire installation.