DeVilbiss AG361 Service Manual page 15

TROUBLESHOOTING MECHANICAL PERFORMANCE
GENERAL FAULTS
Will not spray.
Gun spits paint when triggering on
and off.
Gun spits paint when triggering on
due to paint build-up inside air cap
between spraying operations.
Paint build-up on fluid tip.
Paint build-up on air cap.
Unable to get round spray
When removing air cap from retaining ring, do not remove the ring seat from the retaining ring. Damage to the
parts may occur. Simply wipe parts clean and reassemble with new or clean air cap.
SB-E-2-642 R3.1
CAUSE
No air pressure at gun.
Fluid needle adjustment knob not
open enough.
Incorrect needle fitted to gun.
Excessive needle wear.
Excessive fluid tip wear.
Fluid tip not fitted correctly in gun
head.
Fluid tip/needle leakage.
Fluid tip not fitted correctly in gun
head.
Fluid tip/needle leakage.
Damaged air cap holes.
Gradual build-up of bounce-back on
gun head.
Fluid tip or sprayhead incorrectly
fitted.
15/24
CORRECTION
Check air supply and air line.
Open fluid needle adjustment knob.
Check fluid tip/needle selection
chart and fit correct item.
Replace with new needle.
Replace with new fluid tip.
Tighten.
Check for damage or blockage.
Tighten.
Check for damage or blockage.
Replace with new air cap.
Thoroughly clean.
Remove, check components for
damage and refit correctly.
EN