FIXED FIRE EXTINGUISHER CONTROL VALVE REPLACEMENT

TM 5-5420-202-20-4

FIXED FIRE EXTINGUISHER CONTROL VALVE REPLACEMENT (Sheet 3 of 14)

Using adjustable wrench, remove elbow

(D) from pressure head (E).

CAUTION

Immediately after removing each dis-

charge line, install protective cap to

cover exposed part. Use protective

caps stowed on dummy plugs at neck

of cylinder.

NOTE

Pressure head (E) must be removed

as one part even though it can be

disassembled.

Using 1-1/2 inch wrench, remove pressure

head (E) and washer (F) from port (G)

on cylinder (H).

CAUTION

6. Using slip joint pliers if necessary,

Make sure bottle does not turn and

pull on discharge cable. Fire extin-

remove protective cap (J) from dummy

guisher will discharge.

plug (K). Using hands only, install and

tighten protective cap (J) on port (G).

Using 1-1/2 inch wrench, remove control

valve (L) and washer (M) from port (N)

on cylinder (P).

Using slip joint pliers if necessary, remove

protective cap (Q) from dummy plug

(R). Using hands only, install and tighten

protective cap (Q) on port (N).

Remove control valve (C) and washer

(S) from cylinder (T) using the same

procedure as step 7.

Using slip joint pliers if necessary,

remove protective cap (U) from dummy

plug (V). Using hands only, install and

tighten protective cap (U) on port (W).

TA248662

Go on to Sheet 4

20-4