Maintenance – Graco Inc. 218-745 User Manual
Page 12
12
307-712
MAINTENANCE
To Clean or Change Air Cap and Fluid Nozzle
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.
Equipment needed:
Soft bristle brush (supplied).
Fluid nozzle wrench (supplied).
Solvent compatible with fluid being sprayed.
Procedure:
1.
Follow the Pressure Relief Procedure Warning on
page 9.
2.
Remove the air cap assembly (BB). See Fig 6.
3.
Turn the locking pin (81) to the unlocked position.
4.
Squeeze the gun trigger and remove the fluid nozzle
(15) with the fluid nozzle wrench (66g) supplied.
Make sure the front of the gun is pointed down. See
Fig 6.
5.
Use the soft bristle brush (66a) supplied and solvent
to clean the air cap, fluid nozzle, and front part of the
gun.
6.
Squeeze the gun trigger and screw the fluid nozzle
back into the gun. Tighten the nozzle securely with
the wrench (66g) supplied. Torque the fluid nozzle to
1.1–1.4 N
S
m (10–12 in–lb). See Fig 6. Turn the lock-
ing pin to the locked position.
7.
Carefully reinstall the air cap assembly. Avoid bend-
ing the electrode (CC).
8.
Tighten the retaining nut so it is snug. If the nut is tight
enough, you will feel resistance when turning the air
cap. If too tight, the spray pattern will be distorted.
Fig 5
KEY
15
Fluid Nozzle
BB
Air Cap Assembly
81
Locking Pin
BB
15
Locked
Position
Unlocked
Position
DETAIL
DETAIL
81
81
Fig 6
KEY
CC
Electrode
15
Fluid Nozzle
16
Air Cap Assembly
66g
Wrench
CC
15
16
Torque to
1.1–1.4 N
S
m
(10–12 in–lb)
66g