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Figure 32 - Remove And Clean Screen
SPRAYING
Continued from page 17
Cleaning The Spray Gun Filter
The spray gun includes a filter to catch particles before
they reach the spray tip. If this filter becomes clogged or
obstructed it will reduce the flow of paint, changing the
spray pattern and possibly damaging the filter.
This filter must be cleaned at least daily and perhaps
even every four hours with certain types of latex
materials.
If the filter is not cleaned at the proper time, it will plug from
the top down. When there is about 1 inch of filter that isn't
plugged, the heavy flow of paint will blow pin holes in the
filter. See Figure 30. This in turn will allow unwanted
particles to get into the spray tip, causing spray tip to clog.
Pin Hole
Figure 30 - Gun Filter Cleaning.
To clean the filter during the painting process:
1. Turn spray PRESSURE CONTROL KNOB to mini-
mum setting and turn PRIMING KNOB to PRIME A .
This will bleed off the pressure in the paint hose and
filter. Trigger gun to be sure pressure is gone. Refer
to Pressure Relief Procedure.
2. Remove spray gun from hose using two adjustable
wrenches. See Figure 10
3. Unscrew filter housing, using adjustable wrench on
the nut at the bottom of the housing.
4. Remove filter being sure not to lose the spring and
sealing washer which is located in the bottom of the
filter housing.
5. Clean filter thoroughly (or put in a new filter). To clean
the filter, swish it in water or the type of solvent
appropriate to the paint you are using. If this isn’t
sufficient, use a natural or nylon bristle brush dipped
in the appropriate solvent or water. Do not use a wire
brush or any sharp instrument.
Figure 31 - Gun Filter Cleaning.
Filter
6. Insert the top of the filter (Figure 30) into the gun body
fitting under the tip of the spray gun. See Figure 31.
Suction Set Screen
The screen at the bottom of the suction set may also need
cleaning periodically. Check it every time you change
paint buckets. Remove screen by pulling it out of the
retainer with a pliers. Clean the screen with water or
solvent and a soft-bristle brush, if needed.
7. Replace the spring and sealing washer into the base
of the filter housing.
8. Slide the filter housing over the filter and tighten it
securely to the gun, using a wrench.
9. Reattach the hose, tightening it securely with two
wrenches.
10. Turn PRIMING KNOB to SPRAY B , (Figure 10)
increase pressure to its previous setting and resume
spraying.
Top of Filter
Filter Housing
Sealing Washer
Spring
Gun Body Fitting