Milwaukee M4910-20 Operator's Manual page 15

 Turn PRIME/SPRAY lever to PRIME. This releases pump
pressure.
 Push the lock-off lever up to unlock the sprayer trig-
ger 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.
 Push the lock-off lever down to 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 8 - 10.
User must prime the unit before operating the sprayer. The
high pressure fluid hose should already be attached as
described in the Assembly section of this manual.
 Place desired paint container onto the paint tray.
 Secure container with elastic strap. Place 5 gallon
container lid on container.
NOTE: This unit will hold a 5 gallon or 1 gallon paint
container.
 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.
 Turn HI/OFF/FINISH switch to HI.
 When clean paint or stain begins to flow through return
tube, turn HI/OFF/FINISH switch OFF. set return tube
into paint container and clip to intake tube; Turn HI/OFF/
FINISH switch to HI.
 Point DUAL-ACTION
™
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 HI/OFF/FINISH switch OFF.
OPERATION
pistol-grip sprayer (without guard
 Replace nozzle tip guard and reversible spray tip onto
pistol-grip sprayer.
 Unit is ready to spray.
SELECTING A SPRAY TIP
See Figure 11.
Spray tips come in a variety of hole sizes and fan widths.
Your unit includes two reversible spray tips with a hole size
of .010 in. and .019 in. that will work for a wide variety of
applications. The 310 spray tip has a fan width of 6-8 in. and
is best for fine finish applications. The 619 spray tip has a fan
width of 12-14 in. and is best for airless applications.
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 1415, the 4, 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
Light
hole
size
Stains
•
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 15 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
Medium
Interior
Enamels Primers
Paints
•
• • •
• •
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Heavy
Exterior
Paints
•
•
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