Troubleshooting - Graco SHARPE RAZOR A Serie Manual Del Usuario

Troubleshooting

Troubleshooting
Problem
Right
Wrong
Heavy top
or bottom
pattern
Wrong
Split pattern
Wrong
Gun spitting
Will not spray
Excessive air blowing
back
Gun fluid pressure is too
high with gun triggered
(cannot achieve desired
flow rate).
10
Cause
Normal pattern.
Dirty or damaged air cap
or fluid nozzle.
Pressure too high for vis-
cosity of material being
sprayed.
Dirty or distorted air horn
holes.
Air getting into paint
stream.
Cup is empty.
Fluid control valve (8)
turned too far clockwise.
Loose fluid nozzle (11).
Damaged fluid
nozzle seal (21).
Using needle/nozzle kit
with too small orifice.
Solution
No action necessary.
Rotate air cap 180°.
If pattern follows air cap, problem is in air cap
(13). Clean and inspect. If pattern is not
corrected, replace air cap.
If pattern does not follow the air cap, the
problem is with the fluid nozzle. Clean and
inspect the nozzle. If the pattern is not
corrected, replace nozzle.
Reduce air pressure and increase material
viscosity.
Correct pattern by narrowing fan size with
the- fluid control valve (8).
Clean and inspect air cap. If pattern is not
corrected, replace air cap.
Check if cup is empty and fill.
Tighten fluid nozzle (11).
Check and tighten needle packing nut (17).
Check fluid nozzle (11) for damage.
Fill cup.
Adjust fluid control valve (8) counterclockwise.
Tighten fluid nozzle (11).
Replace seal (21).
Use needle/nozzle kit with larger orifice.
312412B