TM 5-3740-214-14
Table 3-2. Operator Troubleshooting (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOZZLE PRESSURE BELOW 90 PSI (Continued)
WARNING
DO NOT turn the solenoid valve switch ON while checking the nozzle assembly for air leaks.
CAUTION
DO NOT use tools to tighten the knurled ring. Tighten it by hand. Too much force will damage the
nozzle assembly.
DO NOT use too much force to tighten the fluid nozzle. Too much force will damage the teflon
gasket.
NOTE
The engine must be running to check for leaks around the nozzle assembly.
a. If the nozzle assembly parts listed above do not leak, notify your supervisor of
problem.
b. If any of the nozzle assembly parts listed above are loose, tighten them. If they
still leak, go to step 2d.
c. Shut the engine OFF before replacing any nozzle assembly parts.
d. If any of the nozzle assembly parts listed above still leak, remove them and
inspect them.
(1) If any of the machined surfaces are nicked or scratched, replace that part and
go to step 2e.
(2) If the teflon gasket is broken or squeezed out of shape, replace it and go to
step 2e.
(3) If the O-rings are cut or cracked, replace them and go to step 2e.
e. After replacing any parts above, start the engine and check pressure again.
(1) If the pressure is 90-100 psi, the problem is solved.
(2) If the pressure is still less than 90 psi, notify your supervisor.
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