TM 5-5420-226-20-1
Symptom-53
DETAILED TROUBLESHOOTING
PROCEDURE
SUPPORT SYSTEM - FIRE EXTINGUISHERS
FIXED
FIRE EXTINGUISHER
FAILS TO OPERATE
WHEN
EXTERIOR
FIRST
SHOT
OR SECOND SHOT HANDLES
ARE PULLED.
This procedure is to be performed by
two
persons.
The
lead
person
is
referred to as the first technician and
shall direct the activity of the second
person called the second technician.
-’% \
\
L:ln
Two
different
control
valves have
been used on the fire extinguisher
Although
different
in appearance
‘Check if second shot handle was pulled.
Second
Technician
(Front
of Vehicle)
.
Visually
check
second
shot
handle
for broken
safety
seal.
Was second shot handle pulled?
‘Check first shot exterior handle for operation.
First Technician (Front of Crew Compartment)
l Disconnect first shot control valve (page 20-2).
l Hold control
valve away
from
and above
first shot
cylinder.
Second
Technician
(Front
of Vehicle)
l Pull first shot exterior
handle.
l Check if first shot handle operates
freely.
Dld first shot exterior handle operate freely?
r
m—
Replace cable between first
4shot exterior handle and first
shot control valve (page 20-17).
—
4-560
TA107249
