Installation Guide

Troubleshooting
12 3A3373C
Troubleshooting
1. Follow , page 6, before checking or
repairing.
2. Check all possible problems and causes
before disassembling the unit.
Problem
What to Check
If check is OK, go to next
check
What to Do
When check is not OK,
refer to this column
Material will not flow out of
gun
Material too thick Thin material. Increase pres-
sure at pump.
Not enough air Open gun air control valve
(A) more (counter-clockwise)
Trigger adjustment set too
low
Rotate trigger nut clockwise
to increase (adjust) trigger
travel
Nozzle too small Increase nozzle size
Gun is plugged Clean gun
Pattern too fine Material too thin Add more dry material to mix
to thicken
Air pressure too high Close gun air control valve
(A) partially (clockwise)
Gun needle travel too low Rotate trigger nut clockwise
to increase (adjust) trigger
travel
Nozzle too small Replace nozzle with larger
size
Pattern too coarse Material too thick Add water to mix to thin
material
Air pressure too low Open gun air control valve
(A) more (counter-clockwise)
Nozzle too large Replace nozzle with smaller
size
Gun will not shut off Worn nozzle and/or needle Replace worn parts
Nozzle retaining ring not on
all the way
Tighten completely.
Debris in gun passages Clean gun.
Fluid leaking at flow needle
nut (8)
Damaged seal Replace seal (3).