TM 3-1040-220-12&P
charged with air pressure.
4-12. Troubleshooting Table
WARNING
probable cause, and corrective action information useful
in diagnosing and correcting unsatisfactory operation or
failure. The troubleshooting procedures presented in
Release pressure from disperser before
disassembling the disperser to service
with T1 technical talc and the compressed gas cylinders
or repair any part causing trouble.
Table 4-2. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
AGENT LEAKS FROM M9 GUN.
Step 1.
Check for missing connector.
Replace connector.
Step 2.
Split rubber tube
Replace rubber tube in M9 gun.
2.
AGENT LEAKS BETWEEN DELIVERY HOSE AND M9 GUN.
Step 1.
Check for loose connections.
Tighten or remake connections.
3.
AGENT LEAKS BETWEEN DELIVERY HOSE AND BALL VALVE.
Step 1.
Loose connection.
Tighten or remake connection.
Step 2.
Faulty coupling.
Replace quick disconnect coupling half.
4.
INCORRECT DISCHARGE (LOW) PRESSURE
Step 1.
Low pressure in compressed gas cylinders.
Charge compressed gas cylinders.
Step 2.
Globe valve not fully open.
Open globe valve (turn knob counterclockwise).
Step 3.
Level plug valve not fully open.
Open Level plug valve (turn handle clockwise 90).
Step 4.
Pressure regulator defective.
Notify direct support maintenance personnel.
Step 5.
Safety head assembly rupture disk blown.
Replace rupture disk in safety head assembly. Recharge compressed gas cylinders.
If rupture disk continued to blow, notify direct support maintenance p ersonnel.
5.
NO AGENT PRESENT AT HELICOPTER DELIVERY HOSE OR M9 GUN.
Step 1.
Agent container empty.
Fill agent container with agent.
Step 2.
Obstruction at agent container neck, nozzle, or ball valve.
Remove the obstruction.
6.
M9 GUN TRIGGER OR TRIGGER' SAFETY INOPERATIVE
Step 1.
Dirt or foreign matter under trigger safety.
Clean.
Step 2.
Trigger safety catch broken.
Notify direct support maintenance personnel.
Step 3.
Trigger safety catch loose.
Adjust then tighten screws.
Step 4.
Trigger spring broken.
Notify direct support maintenance personnel.
Step 5.
Trigger binds.
Notify direct support maintenance personnel.
7.
RANGE TOO SHORT OR RANGE DROPS RAPIDLY.
Step 1.
Low pressure in compressed air cylinders.
Charge compressed-air cylinders.
Step 2.
Globe valve not fully open.
Open globe valve (turn knob counterclockwise).
Step 3.
Lever plug valve not fully open.
Open lever plug valve (turn handle clockwise 900).
Step 4.
Helicopter delivery hose assembly blocked.
Check the hose assembly. Clean as required.
Step 5.
M9 Gun rubber tube or nonmetallic hose blocked.
Check the rubber tube and hose. Clean as required.
4-6
