TM 5-5420-202-20-4
UPPER DISCHARGE VALVE, TUBES, AND RELATED PARTS REPLACEMENT
(FIXED FIRE EXTINGUISHER) (Sheet 4 of 6)
1.
Install valve (A) in vise.
2.
Using pipe wrench, install elbow (B) into valve (A), making sure that arrow on valve (A)
is pointed towards elbow (B).
Using 1 inch wrench, install self-sealing socket (C) into elbow (B).
3.
Using pipe wrench, install elbow (D) into valve (A).
4.
5.
Using pipe wrench, install elbow (E) into elbow (D).
6.
Remove valve (A) and connecting parts from vise.
7.
Using 7/8 inch wrench, install tube (F) into
elbow (E). Using pipe wrench to hold elbow
(E), use torque wrench and crow foot wrench
to tighten tube (F) to 40-50 lb-ft
(54-75 N m).
8.
Using 1 inch wrench to hold tube (F) and
1-1/8 inch wrench on bushing (G), install
bushing (G) into tube (F). Using 1 inch
wrench to hold tube (F), use torque wrench
and 1-1/8 inch socket to tighten bushing
(G) to 40-50 lb-ft (54-75 N m).
TA248726
Go on to Sheet 5
20-68