Maintenance; Daily Care And Cleaning; Clean The Air Cap And Fluid Nozzle - Graco A Series Instructions-Parts List Manual

Daily Care and Cleaning

For Y our Safety , always follow the Pressure Relief Pro-
cedure on page 9 when shutting off the system, when
you stop spraying and before checking, servicing, install-
ing, cleaning or changing any part in the system.
1. Clean the fluid and air line filters daily.
2. Clean the outside of the gun daily with a soft cloth,
dampened in a compatible solvent.
3. Clean the air cap and fluid nozzle daily, minimum.
Some applications require more frequent cleaning.
Replace the fluid nozzle and air cap if they are
damaged. See Clean the Air Cap and Fluid
Nozzle, below.
4. Check the electrode (56). Straighten it if bent, and re-
place it if broken or damaged. See page 16 for re-
placing the electrode.
5. Check all of the work hangers for build–up of
material; clean them, if necessary.
CAUTION
Do not use metal tools to clean the air cap holes as
this may scratch them, and make sure the elec-
trode wire is not damaged. Scratches in the air cap
holes or a damaged electrode wire can distort the
spray pattern.
Do not use any cleaning method which may al-
low solvent into the gun air passages. Clogged
air passages cause poor atomization and exces-
sive current demands. Point the gun down while
cleaning to prevent dirty solvent from running back
into the air passages. NEVER IMMERSE THE
GUN IN SOLVENT.
Clean all parts with a non–conductive solvent,
compatible with the
Conductive solvents can cause the gun to
malfunction.

Clean the Air Cap and Fluid Nozzle

Equipment needed:
Soft bristle brush (supplied).
Fluid nozzle wrench (supplied).
Solvent compatible with fluid being sprayed.
Procedure:
1. Turn off the Power Supply. Follow the Pressure
Relief Procedure Warning on page 9.
2. Remove the retaining nut (47) and air cap (17). See
Fig 4.
3. Squeeze the gun trigger and remove the fluid nozzle
(19) with the fluid nozzle wrench (77b) supplied.
Make sure the front of the gun is held down. See Fig
4.

MAINTENANCE

fluid being sprayed.
4. Use the soft bristle brush (77a), supplied, and sol-
vent to clean the air cap, fluid nozzle, and front part of
the gun.
5. Squeeze the gun trigger and screw the fluid nozzle
back into the gun finger tight. Torque the fluid nozzle
to 10–12 in–lb (1.1–1.4 N.m) (about 1/4 of a turn) with
the wrench (77b) supplied.
6. Replace the retaining nut and air cap carefully to
avoid bending the electrode wire (56). Tighten the
retaining nut so it is snug, allowing the air cap to turn
with resistance. If it is too tight, the spray pattern will
be distorted.
KEY
17 Air Cap
19 Fluid Nozzle
47 Retaining Nut
56 Electrode
77b Wrench
19
56
17
47
Fig 4
77b