TM 5-5420-202-20-4
FIXED FIRE EXTINGUISHER CONTROL VALVE REPLACEMENT (Sheet 14 of 14)
Using hands, remove protective cap (M)
7.
from port (N) of cylinder (P) and stow
on dummy plug (Q).
Using two adjustable wrenches, install
8.
elbow (R) on pressure head (S).
Using hands, install pressure head(s) and
9.
washer (T) on Port (N)
●
Using 9/16-inch wench, install tube (U)
10.
on elbow (R) and valve adapter (A).
Using 3/8 inch drive torque wrench and
11.
9/16-inch crow foot wrench, tighten
tube (U) to 135-150 lb-in (13.5 -17
N-m).
Using 1-1/2 inch wrench, tighten
12.
pressure head (S) and valves (B) and (K).
Using 1/2-inch drive torque wrench,
13.
tighten pressure head(s) and valves (B)
and (K) to 105-130 lb-ft (142-176 N-m).
Do semi-annual check (page 3-52).
14.
Install personnel heater air duct (page
15.
TA248673
End of Task
20-15