Service Checks - DeVilbiss AGN-502 Operation Manual

SERVICE CHECKS

CONDITION
NORMAL SPRAY PATTERN
A
Will not spray
CONDITION CAUSE
A 1. No pressure at the gun.
2. Gun passages blocked.
B & C 1. Coating material build-up on air
cap or nozzle.
D 1. Coating material too thick or too much.
E 1. Not enough coating material.
F 1. Insufficient material in tank, cup or
an obstruction in the hose.
2. Gun material passage blocked.
3. Worn seal (4).
4. Loose or damaged nozzle.
G 1. Incorrect air pressure on diaphragm
2. Seat (5) dirty or worn.
3. Damaged or worn diaphragm (6).
4. Air leak from valve (13).
SB-E-2 -660 – © ITW LTD 1994
B C
D
E
CORRECTION
1. Check air and coating material lines.
2. Clean.
1. Clean air cap or nozzle.
1. Thin or reduce coating material flow.
1. Reduce atomising air pressure or
increase coating material flow.
1. Fill tank/cup, or clear obstruction.
2. Clean.
3. Replace.
4. Tighten or replace.
1. Increase air pressure to at leased
0.5 bar (8 lbf/in
material pressure.
2. Clean or replace.
3. Replace.
1. Replace '0' ring (12).
F
Fluttering Spray
G
Dripping from nozzle (2)
2
) above coating
7