WERKU WK401210, Original Instructions Manual

English

5

from dust, dirt and grease.

Make sure that the paint 

being used is correctly mixed and free from lumps 

and other particles.

A large number of liquids can 

be sprayed using the paint spray gun, but always 

check the manufacturer’s instructions on these pro-

ducts before using them. 

PAINT VISCOSITY LEVEL.

Remember that most paints are supplied ready for 

application using brushes or rollers, and are not 

suitable for use with the paint spray gun if they are 

not previously diluted.

The viscometer will help to 

decide the correct degree of viscosity of the paint 

to be used (2).

First,  fill  the  paint  viscometer  to 

the top.

Calculate the time the viscometer takes 

to empty completely.

In general, the viscosity of a 

normal product is determined by emptying times 

from 15 to 30 sec.

In general, emptying times for 

the viscometer for different types of material are 

as follows:
Plastic and latex paints:     

  24-28  sec

Water-based 

paints: 

   20-25 sec

Varnishes: 

20-25 

sec

Oil-based paints:    

  18-20  sec

Enamel 

paints:   

 18-22 sec

Paints with aluminium: 

  20-25  sec

Wood sealants:  

  28-35  sec

If the paint takes an excessive amount of time to emp-

ty out of the viscometer, it means it has to be diluted 

further.

To avoid wasting paint, use small amounts of 

the product for viscosity testing, and use the visco-

meter once you have obtained the correct degree of 

viscosity for the paint.

Remember that some paints 

may contain solid particles, and will have to be filte

-

red before filling the cup with paint to prevent dama

-

ging the paint spray gun.

IMPORTANT - FLASH POINT

Do not use this paint spray gun for paints or liquids 

with a flash point above 55ºC.

CLEANING AND ASSEMBLING THE CUP. 

Fill the paint spray gun’s cup by unscrewing it from 

its position (3).

Fill the cup with paint of a suitable 

viscosity and screw it back into the paint spray gun.

Make sure that the cup is firmly screwed back in pla

-

ce.

Make sure that the cup is filled before it empties 

completely, to prevent the gun from operating empty, 

as this may cause damage to it.

START.

Insert firmly the air hose coupling into the connec

-

tion at the rear of the paint spray gun and into the 

base (4).

Press the On/Off switch (5).

SPRAY ADJUSTMENT.

The amount of product sprayed by the paint spray 

gun  can  be  regulated  using  the  fluid  adjuster  (6).

Before starting up the paint spray gun, make sure 

that the nozzle and its retaining nut are firmly ad

-

justed.

Fill the paint cup with a product with the co-

rrect viscosity that has been correctly filtered.

Point 

the paint spray gun at a test section and press the 

switch until the paint starts to be pulverized by the 

nozzle (7).

Change the spray diameter using the 

fluid adjuster until it pulverizes the product perfectly.

By turning the adjuster to the right, less product is 

sprayed (8).

By turning the adjuster to the left, more 

product is sprayed (9).

SPRAYING TECHNIQUES.

For best results keep the paint spray gun level and 

parallel to the surface being painted at all times.

Hold 

the paint spray gun 25-30 cm from the working sur-

face and spray evenly from left to right and up and 

down with slow movements.

Do not spray at an an-

gle, as this will cause the paint to form droplets on the 

surface.

When spraying large areas, use a correct 

working plan (10).

Spray moving the arms and not 

the wrist.

Control the speed of the paint spray gun 

to achieve a smooth, regular movement.

Moving too 

quickly will cause the paint layer to be too thin.

Si-

milarly, moving too slowly will cause the paint layer 

to be too thick.

Apply the coats of paint one by one, 

leaving them to dry for the times indicated by the ma-

nufacturer.

MAINTENANCE.

The paint spray gun has been designed for a long 

working life with minimum maintenance.

Optimum 

use depends on correct care of the paint spray gun 

and regular cleaning.

To prevent accidents, always 

unplug the paint spray gun from the power source 

before cleaning or performing any maintenance.

The 

paint  spray  gun  may  be  cleaned  effectively  using 

compressed air after each use.

If compressed air is 

not available, use a brush to remove dust from the 

paint spray gun.

Motor ventilation vents and switch 

levers must be dept clean and free of foreign matter.

Do not attempt to clean by inserting pointed objects 

through openings.

Cetain cleaning agents and solvents 

damage plastic parts, among them are gasoline, carbon 

tetrachloride, chlorinated cleaning solvents, ammonia