Operation; Maintenance - Husky HDS420 Operating Instructions Manual

Multi-Purpose Spray Gun
Preparation
(Continued)
If the spray is too fine (excessive
overspray), caused by too much air for
the amount of paint being sprayed,
reduce the air pressure or open the
fluid control to spray more material.
If the spray is too coarse (spitting
globs), reduce the amount of material
with the fluid control knob or thin the
material.
DISTANCE ADJUSTMENTS
Start 6" away from work surface. If
pattern begins to run, move back an
inch and try again. The pattern will be
dry and thin and may feel rough if
sprayed from too far away.
SPEED OF STROKE ADJUSTMENTS
If speed of stroke is too slow, paint will
be wet on work surface and may run. If
speed of stroke is too fast, paint will be
dry and uneven on work surface.

Operation

1. Begin spraying.
Always keep the
gun at right angles
to the work by
flexing your wrist
while making the
paint stroke. (See
Figure 6).
NOTE: Do not keep
the wrist stiff during
the stroke and do
not "fan" the gun
WATER/OIL IN COMPRESSED AIR
All compressor pumps discharge
some condensed water, oil or
contaminates with the
compressed air.
IMPORTANT: This condensation
will cause "fish eyes" to appear in
the paint job. Install appropriate
water/oil removal equipment (such
as filters and dryers) and controls as
necessary for the intended
application.
Failure to
NOTICE
install
appropriate water/oil removal
equipment may result in damage
to machinery or workpiece.
from side to side in an arc while
spraying. This type of motion brings the
gun close to the surface and deposits a
heavy concentration of material in the
center of each stroke and applies an
insufficient concentration of material at
the end of the stroke. This will make a
very poor, irregular paint job (See
Figure 7).
Thin Coat
Figure 7
Keep the nozzle about 6 to 9 inches
from the work surface throughout the
stroke and always keep the gun in
motion while spraying. Stopping gun
movement in mid-stroke will cause a
build up of material and result in
"runs."
2. "Trigger" the gun properly. Start the
6 - 9"
gun moving at the beginning of the
stroke BEFORE SQUEEZING THE
TRIGGER and release the trigger
BEFORE STOPPING GUN MOVEMENT
at the end of the stroke. This
procedure will "feather" (blend)
each stroke with the next without
showing overlap or unevenness (See
Figure 8).
6 - 9"
Figure 6
Pull
Trigger
Start
Stroke
Figure 8
3. The amount of material being
applied can be varied by the speed of
the stroke, distance from the surface
and adjustment of the fluid control
knob.
4. Overlap strokes just enough to
obtain an even coat (See Figure 9).
Heavy Coat
Thin Coat
Release
Trigger
End
Stroke
4
Figure 9
5. Use a piece of cardboard as a shield
to catch overspray at the edges of
the work to protect other surfaces.
Use masking tape to cover other
areas if needed.
NOTE: Two thin coats of material will
yield better results and have less chance
of runs than one heavy layer.

Maintenance

DAILY CLEAN-UP
Local codes may require specific
cleaning methods and equipment.
Follow local codes and manufacturer's
recommendations for the use and
disposal of spray materials and solvent.
Clean spray gun
NOTICE
immediately after
use. Paint and other materials dry
quickly in the small passages rendering
gun useless due to the difficulty of
removing hardened materials from the
passages inside the gun.
NOTE: In the instructions below,
"solvent" refers to the specific solvent
for the material used (eg: lacquer
thinner for lacquer, etc ).
1. Spray guns with canister—Remove
and empty the canister; then rinse
with a solvent recommended for the
paint or other material used.
2. Refill canister with clean solvent and
attach to the gun. Spray solvent
through the gun while shaking the
gun vigorously. Wipe the gun
exterior with a solvent soaked rag.
Repeat until the gun is clean.
3. Remove the air cap and soak in
solvent until clean. Use a small brush
for stubborn stains if necessary.
Toothpicks or small brushes may be
used to clean air passages; however,
NEVER USE METAL OBJECTS TO
CLEAN PRECISELY DRILLED
PASSAGES. DAMAGED PASSAGES
WILL CAUSE IMPROPER
SPRAYING.