TM 5-3740-214-14
Table 4-3. Troubleshooting Chart (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOZZLE PRESSURE BELOW 90 PSI (Continued)
Figure 4-65. Nozzle Air Leaks
Step 2.
Check nozzle assembly parts listed below for air leaks.
Knurled ring
Fluid nozzle
Teflon gasket
Nozzle body
Adjusting nuts and nipples
O-rings
Pipe joint at the pulsation tank
NOTE
The engine must be running to check for leaks around the nozzle assembly.
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.
a. Disconnect black power wire from solenoid valve switch to prevent insecticide flow during
maintenance.
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