DeVilbiss JGA - Preventative Maintenance; Replacement of Parts; Accessories

MAINTENANCE & TROUBLESHOOTING PAGE 6
MAINTENANCE & TROUBLESHOOTING PAGE 6
GUN FAULTS
Condition Cause Correction
B
Paint build-up on fluid tip Fluid tip not fitted correctly in gun head
Fluid tip/needle leakage
Tighten to correct torque
Check for damage or blockage
B
Paint build-up on Air cap Damaged air cap holes
Gradual build-up of bounce-back on gun
head
Replace with new Air cap
Thorougly clean
C
Slow fluid leak from needle packing Fluid needle packing worn or loose Tighten or replace as necessary
D
Air valve sluggish or slow to turn
on/off when trigger is
pulled/released
Air valve stem bent
Contamination on air valve stem
Replace damaged component
Remove and clean
D
Air leak from around air valve stem Air valve seal damaged or missing Replace
D
Air valve will not operate (air valve
stem will not fully slide into valve
body) when trigger is pulled
Air valve stem bent
Contamination on air valve stem
Remove air valve and replace damaged air
valve stem
Remove air valve and thoroughly clean
E
Stiff trigger action Air valve stem bent
Contamination on air valve stem
Contamination on trigger bearing screw
Contamination on fluid needle shaft
Fluid needle packing too tight
Replace damaged component
Remove and clean
Remove and clean
Remove and clean
Loosen packing nut
F
Air leak from fluid needle exit point
in top of handle
Seal damaged or missing Replace
G
Air cap retaining ring will not rotate Contamination on retaining threads
Deformed or damaged retaining ring
Soak gun head in solvent to soften paint
Cut retaining ring off of gun (probably
replace retaining ring and baffle)
H
Unable to turn fan control knob on
top rear of gun
Internal O ring swollen or broken
Paint contamination on threads
Replace O ring
Remove and thoroughly clean
H
Unable to get round spray Fluid tip or air baffle incorrectly fitted
Air baffle chinmey damaged
Remove, check components for damage
and refit correctly
Replace air baffle
I
Air leak from baffle seal Baffle seal swollen or damaged Replace
J
Unable to turn air control valve on
handle of gun
Internal O ring swollen or broken
Paint contamination on threads
Replace O ring
Remove and thoroughly clean