6308-188
MAINTENANCE
Daily Care and Cleaning
WARNING
Pressure
Relief Procedure
To
reduce the risk
of serious bodily injury
, including
splashing in the eyes or on the skin or injury from
moving parts, always follow this procedure when
shutting
of
f the system, when
checking or servicing
any part of the spray system, when installing,
cleaning or changing fluid nozzles, and whenever
you
stop spraying.
1. T
urn of
f the air and fluid supply to the gun.
2. Trigger the gun into a grounded metal waste
container
to relieve fluid pressure.
CAUTION
Clean all parts with a solvent compatible with the
fluid
being sprayed and compatible with gun wetted
parts.
See TECHNICAL DA
T
A
on the back page.
To avoid getting solvent in the gun air passages,
NEVER
immerse the gun in solvent
.
To avoid scratches that can distort the spray pat-
tern,
NEVER use metal instruments
to clean holes
in the air cap or fluid nozzle .
1.
After operation, flush the gun with a compatible sol
-
vent
until all traces of paint are removed from the gun
passages. Follow the Pressure Relief Procedure
Warning,
at left, before proceeding.
2. Wipe the outside of the gun clean with a solvent
dampened
cloth.
3. Remove the air cap and fluid nozzle from the gun.
Soak them in solvent and scrub them with a fine,
bristled
brush (provided with the gun).
4. To
clean out air
cap holes, use a soft implement, such
as a toothpick, to avoid damaging critical surfaces.
Clean the air cap and fluid nozzle daily, minimum.
(Some
applications require more frequent cleaning.)
5. Lubricate
the exposed portion of the fluid needle (1)
daily
with Graco TSL or light oil. Periodically lubricate
the needle spring (7) and cylinder with light-weight
grease
or petroleum jelly
. See Fig 3, page 9.
NOTE: The shield (24) helps to minimize over-spray
buildup on the fluid needle (1). Refer to the
PARTS
DRA
WING.
GUN OPERA
TION TROUBLESHOOTING CHART
WARNING
To
reduce the risk of serious bodily injury
, including
splashing
fluid or solvent in the eyes or on the
skin,
always follow the Pressure Relief Procedure
Warning,
above, before checking, adjusting, clean
-
ing or repairing the gun or any part of the system.
Disconnect
the fluid hose from the gun.
NOTE:
Check all possible remedies in the T
roubleshoot-
ing
Charts before disassembling the gun.
PROBLEM CAUSE SOLUTION
Loose needle packing nut(s) (9).
T
ighten packing nut(s).
W
orn needle packings (10, 16).
Replace packing assemblies.
See page 8.
Fluid leakage from
front of gun.
Fluid needle (1) worn or damaged.
Replace fluid needle. See page 8.
W
orn fluid needle and fluid nozzle seat
Replace fluid nozzle (2) and needle (1).
See page 8.
Fluid packing nuts (9) too tight.
Lubricate packings (10, 16) and adjust
packing nuts (9). See page 8.
Leakage from fluid pack
-
ing nut.
