CHAPTER 2 DIRECT SUPPORT MAINTENANCE INSTRUCTIONS

CHAPTER 2

DIRECT SUPPORT MAINTENANCE INSTRUCTIONS

Section I. GUN GROUP

b. Assembly and Installation.

2-1.

M9 Gun

(1) If removed, install the trigger and associated

Direct support maintenance personnel are authorized to

parts (para 2-2b and c).

replace the valve body of the gun group.

(2) Moisten and install the small tapered end of the

WARNING

connector (A, fig. 2-3) into the end of the tubber tube.

Purge the air in the air pressure sys-

(3) With the right hand, depress the trigger safety.

tem

before

attempting

any

Squeeze and hold the trigger (B, fig. 2- 3).

maintenance or modification to the

pressure system.

(4) Slide the rubber tube into the valve section until

the connector is seated in the valve body.

a. Disassembly and Removal.

(5) With the trigger depressed, pull and stretch the

(1) Close the pressure tank valve by turning the

hose to remove the slack in the hose.

valve handle (B, fig. 2-1) clockwise.

While the hose is under tension, release the trigger.

Release the rubber tube.

(2) Open the shutoff valve by turning the handle

(fig. 1-1) counterclockwise.

(6) Slide the loose end of the rubber tube into the

barrel section (C, fig. 2-3). Engage the key on the barrel

(3) Rotate the ball depressing ring (C, fig. 2-1) on

with the slot in the threaded portion of the valve section.

the quick-disconnect coupling half until the slot in the ring

is in line with the lock pin.

CAUTION

(4) Pull the ring back and remove the hose

Do not use a wrench to tighten the

assembly from the agent delivery coupling.

locknut.

(5) Remove the coupling cap (B, fig. 2-1) from the

(7) Hand tighten the locknut to the valve section

holder. Install the coupling cap on the agent delivery

(C, fig. 2-3).

pipe coupling (A).

(8) Moisten and install the small tapered end of the

(6) Using a wrench, disconnect the hose assembly

sleeve into the open end of the rubber tube at the barrel

coupling (fig. 2-2) from the M9 gun.

end. The sleeve should wedge the end of the rubber

tube against the gun barrel's inner wall.

(7) Loosen the collar setscrews (C, fig. 2-3).

(9) Slide the collar over the sleeve and the end of

(8) Remove and retain the collar.

the gun barrel. Tighten setscrews.

(9) Remove and retain the sleeve.

(10) Apply antiseize compound or tape on the hose

assembly coupling threads (fig. 2-2).

(10) Depress the trigger safety and squeeze and

hold the trigger.

(11) Slide the hose assembly coupling over the

connector.

(11) Remove and retain connector with rubber

tube. Release the trigger.

(12) Using a wrench, tighten the coupling to the

valve section. Do not overtighten.

(12) Loosen the locknut completely and disconnect

the valve section from barrel section.

(13) Remove the trigger and associated parts, if

serviceable (para 2-2a).

(14)

Replace

the

damaged

valve

section.

2-1