TM 9-1240-380-34
HEAD ASSEMBLY PURGING AND CHARGING
TEST EQUIPMENT: Fire control purging kit
TOOLS: 1/4" flat tip screw driver
3/8'' open end wrench
SUPPLIES: Soap
PERSONNEL: One
REFERENCES: JPG 41C for purging and charging setup
EQUlPMENT CONDITION: Head assembly on work bench
PRELIMINARY PROCEDURES: Do purging and charging setup (JPG)
NITROGEN GAS UNDER PRESSURE
DEATH
or severe injury may result if personnel fail to observe safety
precautions listed in Job Performance Guide 113-091-9000R.
Procedure
Turn valve (1) fully counterclockwise.
Turn tank valve (2) counterclockwise until reading on high pressure gage (3) is greater
than 100 psi (JPG).
Using screwdriver, remove machine thread plug and gasket (4) from head assembly (5).
Using wrench, remove cap (6) from purge valve (7).
Connect free end of hose assembly (8) to purge valve (7) of head assembly (5).
Turn valve (1) slowly clockwise until reading on low pressure gage (9) is 5 psi.
Wait 5 minutes. Turn valve (1) slowly counterclockwise until reading on low pressure gage
(9) is 1 psi.
Using screwdriver, install machine thread plug and gasket (4) into head assembly (5).
.
Check head assembly (5) for leaks (JPG). If leaks are found, fault isolate leaks (Vol I,
Wait two minutes. Turn tank valve (2) fully clockwise.
Turn valve (1) fully counterclockwise.
Vol II
