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HC 920 • HC 940 • HC 960 43
GB
Spraying technique Cleaning the unit (shutting down)
5. Move the hydraulic ball valve (6) on the material feed
pump to its vertical position (open). This will switch on the
hydraulic motor.
Hydraulic oil flows to the hydraulic motor of the material
feed pump.
6. Turn the pressure control knob (2) to the right (pressure
increase) until coating material exits the return hose.
7. Turn relief valve handle (3) fully clockwise (* spray).
8. Pull the trigger of the spray gun, then set the desired
operating pressure by means of the pressure control knob
(2).
9. The unit is ready to spray.
5. Spraying technique
Move the spray gun evenly during the spraying process.
Otherwise the spray pattern will be uneven. Carry out the spray
movement with the arm, not with the wrist. Observe a parallel
distance of approx. 30 cm between the spray gun and the object
of spraying. The lateral edge of the spray jet should not be too
distinct. The spray edge should be gradual in order to facilitate
overlapping of the next coat. Always move the spray gun parallel
and at an angle of 90° to the surface to be coated in order to
minimize the paint mist.
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If very sharp edges result or if there are streaks
in the spray jet – increase the operating pressure
or dilute the coating material.
6. Handling the high-pressure hose
Avoid sharp bending or kinking of the high-pressure hose. The
smallest bending radius amounts to about 20 cm.
Do not drive over the high-pressure hose. Protect against sharp
objects and edges.
Danger
Danger of injury through leaking high-pressure
hose. Replace any damaged high-pressure hose
immediately.
Never repair defective high-pressure hoses
yourself!
6.1 High-pressure hose
The unit is equipped with a high-pressure hose specially suited
for piston pumps.
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Use only WAGNER original-high-pressure hoses
in order to ensure functionality, safety and
durability.
7. Interruption of work
1. Move the hydraulic ball valve on the material feed pump to
its horzontal position (closed).
Flow of hydraulic oil to hydraulic motor of material feed
pump is interrupted.
2. Turn the relief valve handle (3) fully counterclockwise (&
Circulation).
3. Turn off the gasoline engine or electric motor.
4. Pull the trigger of the spray gun in order to release the
pressure from the high-pressure hose and spray gun.
5. Secure the spray gun, refer to the operating manual of the
spray gun.
6. If a standard tip is to be cleaned, see page 57, point 13.2.
If a non-standard tip is installed, proceed according to the
relevant operating manual.
7. Leave the suction tube immersed in the coating material or
immerse it in the corresponding cleaning agent.
Attention
If fast-drying or two-component coating material
is used, ensure that the unit is rinsed with a
suitable cleaning agent within the processing
time.
8. Cleaning the unit (shutting down)
A clean state is the best method of ensuring operation without
problems. After you have finished spraying, clean the unit. Under
no circumstances may any remaining coating material dry and
harden in the unit.
The cleaning agent used for cleaning (only with an ignition point
above 21 °C) must be suitable for the coating material used.
• Secure the spray gun, refer to the operating manual of the
spray gun.
Clean and remove tip.
For a standard tip, refer to page 57, point 13.2.
If a non-standard tip is installed, proceed according to the
relevant operating manual.
1. Push locking pin and swivel material feed pump out of
coating material.
2. Pull the trigger of the spray gun in order to pump the
remaining coating material from the suction tube, high-
pressure hose and the spray gun into an open container.
Attention
The container must be earthed in case of coating
materials which contain solvents.
Danger
Caution! Do not pump or spray into a container
with a small opening (bunghole)!
Refer to the safety regulations.
3. Push locking pin and swivel material feed pump to a
container with suitable cleaning agent.
4. Turn the relief valve handle (3) fully counterclockwise (&
Circulation).
5. Pump a suitable cleaning agent in the circuit for a few
minutes.
6. Turn relief valve handle (3) fully clockwise (* spray).
7. Pump the remaining cleaning agent into an open container
until the unit is empty.
8. Turn the relief valve handle (3) fully counterclockwise (&
Circulation).