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Interruption of work
The container must be earthed in case
of coating materials which contain sol-
vents.
Attention
Caution! Do not pump or spray into a
container with a small opening (bung-
hole)!
Danger
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
(k Circulation).
5. Pump a suitable cleaning agent in the circuit for a few
minutes.
6. Turn relief valve handle (3) fully clockwise (p spray).
7. Pump the remaining cleaning agent into an open con-
tainer until the unit is empty.
8. Turn the relief valve handle (3) 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 gaso-
line engine and let it cool down.
Electric units — Unplug the mains
Danger
plug from the socket.
Danger of short-circuits through penetrat-
ing water.
Never spray down the unit with high-pres-
Danger
sure or high-pressure steam cleaners.
Wipe the unit off with a cloth soaked in a suitable clean-
ing agent.
44
GB
8.2 Suction filter on HC 920
A clean suction filter always guarantees
i
maximum feed quantity, constant spray-
ing pressure and problem-free function-
ing of the unit.
– Screw off the filter (fig. 15)
from suction pipe.
– Clean or replace the filter.
Carry out cleaning with a
hard brush and an appro-
priate cleaning agent.
8.3 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 (3) fully counterclockwise
(k Circulation).
3. Turn off the gasoline engine or electric motor.
4. Unscrew the housing cover (fig. 16, 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, are-
move 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.
Cleaning the unit (shutting down)
HC 920 • HC 940 • HC 960
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