SERVICE
Air and Fluid Fitting Replacement
When replacing the fluid fitting (4a),
BE SURE to reinstall
the gasket and washer included with the fitting (gasket
and washer are not sold separately). Apply Loctite
242
sealant or equivalent on the fluid fitting threads and
torque the fitting to 20 ft-lb (27 N
m).
When replacing the cylinder (CYL) air fitting (4b), apply
Loctite
PST pipe sealant or equivalent on the threads
before installing the new fitting. DO NOT remove the
atomizing air fitting as it is press fit.
Piston Service
1.
Follow the Pressure Relief Procedure Warning on
page 6 to relieve fluid pressure.
2.
Unscrew and remove the fluid needle guide (8).
3.
Carefully pull the fluid needle (1) out of the piston
(12).
4.
Clean and inspect the fluid needle (1), spring (7), pis-
ton (12), and piston packings (13, 15) for damage or
wear. Replace if needed.
5.
Apply a few drops of light-weight machine oil to the
fluid needle and reassemble the parts.
Fluid Packing Replacement
If fluid leakage cannot be stopped by tightening the pack-
ing nuts (9), replace the fluid packings (10, 16). Service
as instructed below; refer to Fig 3.
1.
Follow the Pressure Relief Procedure Warning on
page 6 to relieve fluid pressure.
2.
Unscrew and remove the fluid needle guide (8).
3.
Carefully pull the fluid needle (1) out of the piston
(12).
4.
Unscrew the packing nuts (9) and remove the pack-
ings (10, 16); use a pick if needed.
5.
Clean and inspect the fluid needle (1); replace the
needle if damaged or worn.
6.
Reinstall the fluid needle (1) through the piston (12)
and the rear packing cavity.
7.
Slide the rear packings (16) onto the fluid needle;
orientate them as shown in Packing Detail 16.
8.
Slide the packing nuts (9), threads facing oppositely,
onto the fluid needle.
9.
Slide the remaining four packings (10) onto the fluid
needle in the order shown in Packing Detail 10.
10. Slide the fluid needle (1) into the front fluid packing
cavity.
11. Push the fluid needle (1) and piston (12) fully forward.
12. Screw in both packing nuts (9) until the packings (10,
16) are fully compressed, then back off the nuts until
the fluid needle moves freely.
NOTE: For the best packing life, lubricate the fluid
needle daily as explained in MAINTENANCE,
step 5.
IMPORTANT PHONE NUMBERS
TO PLACE AN ORDER, contact your Graco distributor,
or call this number to identify the distributor closest to
you:
1–800–328–0211 Toll Free
FOR TECHNICAL ASSISTANCE, service repair infor-
mation or assistance regarding the application of Graco
equipment:
1–800–543–0339 Toll Free
