Table 4-3. Troubleshooting Chart (Continued)
TEST OR INSPECTION
NOZZLE PRESSURE BELOW 90 PSI (Continued)
Figure 4-65. Nozzle Air Leaks
Check nozzle assembly parts listed below for air leaks.
Adjusting nuts and nipples
Pipe joint at the pulsation tank
The engine must be running to check for leaks around the nozzle assembly.
DO NOT turn the solenoid valve switch ON while checking the nozzle assembly for air leaks.
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
a. Disconnect black power wire from solenoid valve switch to prevent insecticide flow during