Installation Guide

Troubleshooting
3A3373C 13
Needle nut won’t adjust Dirty threads Clean threads.
Nozzle not on gun Put nozzle on gun.
Needle triggered Adjust when trigger is not
pulled.
Air won’t shut off when gun
trigger is released
Debris in gun air passages Clean gun.
Loose air fittings Tighten air fittings on gun
Worn air seals Replace air shutoff needle
u-cup (4) and/or air valve
seal (18)
Prime valve is leaking. Remove and clean prime
valve.
Prime valve is plugged. Remove and clean prime
valve.
Problem
What to Check
If check is OK, go to next
check
What to Do
When check is not OK,
refer to this column