38
HC 950 • HC 970
GB
Cleaning the unit (shutting down)
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 43, point 11.2.
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.
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 fully counterclockwise (
k
Circulation).
5. Pump a suitable cleaning agent in the circuit for a few
minutes.
6. Turn relief valve handle fully clockwise (
p
spray).
7. Pump the remaining cleaning agent into an open container
until the unit is empty.
8. Turn the relief valve handle fully counterclockwise (
k
Circulation).
9. Move the hydraulic ball valve on the material feed pump to its
horzontal position (closed).
10. Turn off the gasoline engine or electric motor.
8.1
Cleaning the unit from the outside
Gasoline units — Switch off the gasoline engine and
let it cool down.
Electric units — Unplug the mains plug from the
socket.
Danger of short-circuits through penetrating water.
Never spray down the unit with high-pressure or
high-pressure steam cleaners.
Attention
Do not put the high-pressure hose into solvents.
Use only a wet cloth to wipe down the outside of the
hose.
Wipe the unit off with a cloth soaked in a suitable cleaning agent.
8.2
Cleaning the high-pressure filter
Clean the filter cartridge regularly.
A soiled or clogged high-pressure filter can cause a poor spray
pattern or a clogged tip.
Disassembly
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 fully counterclockwise (
k
Circulation).
3. Turn off the gasoline engine or electric motor.
4. Unscrew the housing cover (fig. 15, item 1).
5. Pull filter cartridge (3) out of housing (8).
6. Clean the pressure spring (2) and filter cartridge (3) with an
appropriate cleaning agent, clean the inside of the housing (8)
and housing cover (1).
7. Check ball in the filter cartridge (3) for wear and replace filter
cartridge, if necessary.
8. If ball in filter cartridge (3) is thoroughly worn, aremove O-ring
(6) and valve seat (7). Replace worn valve seat, if necessary.
9. Always replace O-ring (6) after removal.
10. Pull off pressure spring (2) from housing cover (1).
Measure length of pressure spring, and replace if shorter than
19 mm.
Assembly
1. Insert valve seat (7) with the ball seat surface facing up into
the housing (8).
2. Insert O-ring (6) into the housing (8).
3. Insert filter cartridge (3).
4. Place thin seal (5) on threaded section of housing (8).
5. Place thick seal (4) on top of thin seal (5).
6. Slide pressure spring (2) onto housing cover pin (2).
7. Screw on housing cover (1) and tighten by hand.
Summary of Contents for HC950
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