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Pressure Feed: Adjust fluid pressure to
deliver the desired paint volume, based
upon the spray pattern required and ap-
plication speed. Adjust the fan air knob
(37) to change pattern size. Regulate the
fluid volume at the source, rather than by
closing off the fluid adjusting screw (32).
Restricting needle travel will cause accel-
erated wear to the fluid tip and needle in
pressure feed guns.
Suction Feed: Fill suction cup (not pro-
vided with gun) with material and attach
to lid. Adjust air pressure at source or
adjusting valve (27). The amount of fluid
delivery can be controlled with the adjust-
ing screw (32). In suction feed, the amount
of air pressure and material viscosity have
an effect on the amount of fluid output.
Gravity Feed: Fill cup with material and
close lid. Adjust air pressure at source or
air adjusting valve (27). The amount of
fluid output can be controlled by the ad-
justing screw (32) on the gun.
CLEANING - PREVENTIVE MAINTENANCE
To clean air cap and fluid tip, brush exte-
rior with a stiff bristle brush. If necessary
to clean cap holes, use a broom straw or
toothpick. Never use a wire or hard in-
strument. This may scratch or burr holes
causing a distorted spray pattern.
Pressure Feed: Material in the fluid hose
can be backflushed to the pressure tank.
(1) relieve tank pressure, (2) open the lid
and tip to the side, (3) loosen air cap 2 or
3 turns, then place a cloth over cap, and
pull trigger.
Flush fluid hose and gun fluid passages
with appropriate cleaning solvent. Wipe
exterior of spray gun with a wet solvent
cloth.
Suction Feed:
Empty excess material
from cup. Clean fluid tube exterior and
cup. Fill cup with appropriate cleaning
solvent. Attach cup to lid and spray sol-
vent through gun to clean passages. Wipe
exterior of spray gun with a wet solvent
cloth.
Gravity Feed: Empty excess material from
cup. Fill cup with appropriate cleaning
solvent. Shake cup to wash down inside
surfaces of cup. Spray solvent to flush out
passages. Pour out solvent, adding more
clean solvent. Shake cup and spray again.
SPRAY GUN LUBRICATION
Daily, apply a drop of *SSL-10 spray gun
lube at trigger bearing stud (A) and the
stem of the air valve (E) where it enters the
air valve assembly. The shank of the fluid
needle where it enters the packing nut (B)
should also be lubricated. The fluid needle
packing should be lubricated periodically.
Make sure the baffle and retaining ring (D)
threads are clean and free of foreign mat-
ter. Before assembling retaining ring to
baffle, add two drops of spray gun lube to
threads. The fluid needle spring (34) and
air valve spring (19) should be coated with
a very light grease, making sure that any
excess grease will not clog the air pas-
sages. For best results, lubricate the points
indicated, daily.
* A "Material Safety Data Sheet" for SSL-
10 gun lube is available from Devilbiss
upon request.
A. Trigger points
B. Packing
C. Adjusting valves
D. Baffle threads
E. Air valve
cartridge
D
B
E
Figure 4
PARTS REPLACEMENT
When replacing the fluid tip (3A) or
fluid needle (3B), replace both at the
same time with a lapped set. Using
worn parts can cause fluid leakage.
To prevent damage to the fluid tip (3A)
or fluid needle (3B), remove the knob
(32) to relieve spring pressure when
removing or assembling the fluid tip.
Failure to relieve spring pressure can
damage the seating surfaces. Pulling
the trigger is an alternate to removing
the knob.
Fluid Inlet Gasket (8) Replacement:
1. Remove fluid inlet adapter with appro-
priate wrench.
2. Clean Loctite from gun body inlet threads
and inlet fitting.
3. Place gasket (8) squarely on the fluid
inlet fitting (10) or (29) and push down
until flat against boss.
4. Place couple drops of medium strength
blue No. 242 Loctite on threads before
installing fluid inlet adapter.
5. Torque fluid inlet adapter to 25-30 ft. lbs.
6. Tighten locknut (model TGHV-535).
A
C
SB-2-192-F
Page 5
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