Milwaukee M4910-10 Operator's Manual page 14

 Unlock the sprayer trigger and point to inside wall of
paint container releasing unused paint or stain back into
container. This releases pressure in the hose and pistol-
grip sprayer.
 Lock the sprayer trigger.
 Leave prime/spray lever in the PRIME position until ready
to spray again.
FLUSHING THE AIRLESS PAINT SPRAYER
Before using the paint sprayer for the first time or before
beginning a new project or changing colors, it is important
to thoroughly flush the paint sprayer of any storage fluid,
previous cleaning fluid, or material left in the system. Follow
instructions for Cleaning the Airless Paint Sprayer before
beginning any project.
SET UP AND PRIMING
See Figures 6 - 7.
User must prime the unit before operating the sprayer. The
high pressure fluid, intake, and return hoses should already
be attached as described in the Assembly section of this
manual.
 Lock the sprayer trigger.
 Remove nozzle tip guard and spray tip from pistol-grip
sprayer.
 Place intake tube in paint container.
 Set return tube into a waste container.
 Turn prime/spray lever to PRIME.
 Turn variable pressure control to PRIME.
 Plug in the paint sprayer.
 Press and release the Rapid Valve Release button to make
sure the check valve is clear.
 Turn on/off switch to ON.
 When clean paint or stain begins to flow through return
tube, turn on/off switch OFF. Set return tube into paint
container and clip to intake tube; turn on/off switch to
ON.
 Point pistol-grip sprayer (without guard and spray tip in
place) into waste container.
 Turn prime/spray lever to SPRAY.
 Unlock sprayer trigger.
 Spray into waste container until all air, water, and cleaning
fluid is expelled and only paint or stain comes out.
NOTE: When the motor stops, this indicates that the
pump and hoses are under pressure. If the motor con-
tinues to run, re-prime by turning the prime/spray lever
to PRIME.
 Lock the sprayer trigger.
 Turn on/off switch OFF.
 Replace nozzle tip guard and reversible spray tip onto
pistol-grip sprayer.
 Unit is ready to spray.
OPERATION
SELECTING A SPRAY TIP
See Figure 8.
Spray tips come in a variety of hole sizes and fan widths.
Your unit includes a reversible spray tip with a hole size of
.015 that will work for a wide variety of applications. The
spray tip has a fan width of 10-12 in.
Hole SIZe: Spray tip hole size determines the flow rate,
which is the amount of paint that is discharged from sprayer.
A larger hole size is best for thicker materials. A smaller hole
size is best for thinner materials.
FAN SIZe: Fan width determines the size of the spray pattern
when sprayer is held approximately 12 in. from surface to
be painted.
A narrow fan width will provide thicker coverage of material
and is better suited for small, tight areas. A wide fan width
will give thinner coverage of material and provide better
coverage on large, broad areas.
SPRAY TIP NUMBERS: When selecting a spray tip, the last
three numbers of the spray tip number contain information
on hole size and fan width.
For example, if the spray tip number is 515, the first 5, when
doubled, is the approximate fan width of paint when applied
12 inches from surface. The last two numbers, 15, refer to
the hole size in inches. In this case .015 in.
Tip
hole
size
0.011
0.013
0.015
0.017
0.019
0.021
SPRAY TIP WEAR: It is important to replace spray tips
when they become worn. A worn spray tip will cause uneven
application and finish of material. Over time the spray tip hole
size increases and the width of the fan spray decreases.
When using latex paint, spray tips need to be replaced
between 25 and 40 gallons of use. For oil-based materials,
replace spray tips after 35 to 60 gallons of use.
To increase the life of your spray tips, use the lowest pressure
setting needed to apply an even coating of material.
10 — English
Coatings
Light Medium
Stains enamels Primers
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Heavy
Interior
Exterior
Paints
Paints
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