WERKU WK500490, Original Instructions Manual

5

English

ENG

manuals and follow all warnings 

►

Set up the 

sprayer 

►

Refer to the instructions in the sprayer’s 

owner’s manual 

►

Attach a grounded hose to 

the material inlet on the airless gun 

►

Using two 

wrenches (one on the airless gun and one on 

the hose), tighten securely (4) 

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With the tip and 

tip guard off the airless gun, start the sprayer 

►

Flush and prepare the spray system according 

to the sprayer’s owner’s manual 

►

Inspect the 

spray system to make sure that all fittings are 

secure and that there are no leaks 

►

Perform 

the pressure relief procedure described in the 

sprayer’s owner’s manual 

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Using a pen or 

similar object, insert the tip seal and seal into 

the back of the tip guard (5) 

►

Press in for final 

adjustment 

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Insert the tip into the slot on the 

tip guard (6) 

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Thread the tip guard onto the 

airless gun 

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Position the tip guard in the desired 

spraying position, then tighten securely. 

OPERATION.

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Make sure the arrow on the tip handle is 

pointing in the forward direction for spraying 

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Start the sprayer 

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Refer to the instructions 

in the sprayer’s owner’s manual 

►

Adjust the 

fluid pressure on the sprayer until the spray is 

completely atomized 

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Always spray at the lowest 

pressure necessary to get the desired results 

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The spray tip determines the size of spray 

pattern and coverage 

►

When more coverage is 

needed, use a larger tip instead of increasing fluid 

pressure.

CLEAR CLOGGED TIP.

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Rotate the tip 180º so that the arrow on the tip 

handle is pointing opposite the spray direction 

(7) 

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Trigger the airless gun once so that the 

pressure can blow the clog out 

►

Never pull the 

trigger more than once at time with the tip in the 

reverse position 

►

Continue this procedure until 

the tip is clear of the clog.

CHANGING TIP.

►

Tips can be removed and replaced easily 

without disassembling the airless gun 

►

Never 

attempt to change or clean the tip or tip 

guard without first performing the pressure 

relief procedure 

►

Perform the pressure relief 

procedure described in the sprayer’s owner’s 

manual 

►

Remove the tip from the slot on the tip 

guard 

►

Insert the new tip into the slot on the tip 

guard 

►

The arrow on the tip handle should be 

pointing in the forward direction for spraying.

REMOVING SEAL AND TIP SEAL.

►

Remove the tip and tip guard from the airless 

gun 

►

Remove the seal and tip seal from the 

back of the tip guard (8).

IDENTIFYING TIP SIZES.

►

To identify tip sizes, use the following formula 

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A 517 tip size will be used in this example 

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The first digit multiplied by two represents the 

size of the spray pattern when spraying 12” (30 

cm) away from the work surface: 5 x 2 = 10” 

(25 cm) spray pattern 

►

The second two digits 

represent the diameter of the orifice on the tip: 

17 = 0.017” (0.43 mm) orifice 

►

Worn spray tips 

will adversely affect the spray pattern and result 

in reduced production, poor finish, and wasted 

material ►Replace worn tips immediately.

CLEANUP.

►

Maintaining a clean airless gun is important to 

ensure trouble-free operation 

►

Flush the airless 

gun after each use and store in a dry location 

►

Do not leave the airless gun or any of its parts 

in water or solvents.

CLEANUP INSTRUCTIONS FOR USE WITH 

FLAMMABLE SOLVENTS.

►

Always flush airless gun preferably outside 

and at least one hose length from spray pump 

►

If collecting flushed solvents in a 4 liter 

metal container, place it into an empty 20 liter 

container, then flush solvents 

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Area must be 

free of flammable vapors 

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Follow all cleanup 

instructions 

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The sprayer, hose and airless 

gun should be cleaned thoroughly after daily 

use 

►

Failure to do so permits material to cake, 

seriously affecting the performance of the unit 

►

Always spray at minimum pressure with the 

tip and tip guard removed when using mineral 

spirits or any other solvent to clean the sprayer, 

hose or airless gun 

►

Static electricity buildup 

may result in a fire or explosion in the presence 

of flammable vapors 

►

Hold the airless gun firmly 

against a metal container while flushing.