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 TM 3-1040-214-12
Table 4-2. Troubleshooting-Continued
Item
No.
Malfunction
Probable cause
Corrective action
8
Range too short or range
a. Pressure tank valve closed -------------
Fully open pressure tank valve.
drops rapidly.
b . Clog hose group ----------------------------
Clean hose by using jet of clean water.
c. Insufficient pressure in pressure
Replace pressure tank with a fully
tank.
charged pressure tank (para 4-10).
Section VII. GUN GROUP
(1) Purge the air in the pressure system
4-23. M9 Gun
Organizational maintenance personnel are authorized to
(2) Rotate
the
ball
depressing
ring
replace the M9 gun.
(step C, Fig. 2-2) on the quick-disconnect coupling half
a. Removal.
until the slot in the ring is in line with lock pin.
(1) Purge the air in the pressure system
(3) Pull the depressing ring back and remove
the hose assembly from the agent delivery coupling.
(2) Rotate
the
ball
depressing
ring
(4) Remove the coupling cap (step B) from
(step C, Fig. 2-2) on the quick-disconnect coupling half
the holder. Install coupling cap on the agent delivery
until the slot in the ring is in line with the lock pin.
pipe coupling.
(3) Pull the depressing ring back and remove
(5) Using a wrench, disconnect the hose
the hose assembly from the agent delivery coupling.
assembly coupling (Fig. 1-3) from the M9 gun.
(4) Remove the coupling cap (step B) from
(6) Loosen the collar setscrews (step C, fig 4-3).
the holder. Install the coupling cap on the agent delivery
(7) Remove and retain the collar.
pipe coupling.
(8) Remove and retain sleeve.
(5) Using a wrench, disconnect the hose
(9) Depress
trigger
safety
and
squeeze
assembly coupling (Fig. 1-3) from the M9 gun.
trigger.
b. Installation.
(10) Remove connector with rubber tube.
(1) Apply anti-seize compound of tape on the
(11) Loosen locknut completely and disconnect
hose assembly coupling threads (fig 1-3).
the valve section from barrel section.
(2) Slide the hose assembly coupling over the
b. Assembly and Installation.
connector on the M9 gun.
(1) Moisten and insert the connector into the
(3) Using a wrench, tighten the coupling to
the M9 gun valve section. Do not overtighten.
rubber tube (step A, Fig. 4-3). The end of the rubber
tube should meet the shoulder on the connector.
(4) Remove the coupling cap (step A, fig. 2-2)
(2) With the right hand depress the trigger
and stow it on the cap holder.
safety and squeeze the trigger (step B).
(5) Connect the quick-disconnect coupling
(3) Slide the rubber tube into the valve
half on the hose assembly to the agent delivery pipe
section until the connector is seated in the valve body.
coupling.
(4) With the trigger depressed, pull and
(6) Rotate the ball depressing ring until the
slot in the ring is not in line with pin.
stretch the hose to remove the slack in the hose. While
the hose is under tension, release the trigger. Release
4-24. M9 Gun Connector, Rubber Tube, Sleeve,
the rubber tube.
Collar, and Setscrews
(5) Slide the barrel section (step C) on the
Organizational maintenance personnel are authorized to
loose end of the rubber tube. Engage the key on the
replace the M9 gun barrel connector, rubber tube,
barrel with the slot in the threaded portion of the valve
sleeve, collar, and setscrews.
section.
a. Disassembly and Removal.
4-17
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