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E. maintenance – Karcher HD 6000 C User Manual

Page 21

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HD 4000 C / HD 6000 C

English

5.956-648 A10369 (06/98)

E. Maintenance

E4

Interval

Procedure

Subject Assembly

Activity

By whom

monthly, or
after 200
operating
hrs.

Check
overflow valve

Overflow valve

Dependent on the number of
high-pressure handguns used, the
pressure reading fluctuates between
the preset value and approx. 15 bar
below the same. On closing all
handguns, the gauge will read
approx. 0 bar. In the event of
malfunction, call customer service.

Operator

Customer
service

Check
low-water
sensor

Float switch in float
reservoir

For about 5 seconds press down the
float of the low water protection
facility and check the fault indication
on the printed circuit board. If
necessary remove any deposits.

Trained
operator
authorised
to open
control
cabinet

Clean
strainers

Dirt trap upstream of float
reservoir,
Pressure controller

Switch OFF unit, turn OFF water,
release pressure. Disassemble and
clean strainers.

Operator

Check float
valve

Float reservoir

Water level must stand 40 mm
below the overflow weir. With float
valve closed, no water may exit. For
adjustment information, refer to the
Service Manual.

Operator

Check
pressure relief
valve

Pressure relief valve on
pump

When functioning correctly, the
motor must reach full RPM within
2 seconds. If required, clean the
strainer upstream of the pressure
release valve. Prior to cleaning:
Shut OFF water, set Emergency-
STOP master switch to OFF.

Operator

Check run-on
interval

System control

Close utiliser (e.g. handgun).
After the after running time (approx.
15 sec) the pump must switch off.

Operator

Check
automatic
switching on

Pressure switch

The pump is stationary as no water
is being drawn. Open the handgun.
When the pressure in the
high-pressure network drops below
25 bar, the pump must switch on.

Operator

Tighten hose
clamps

All hose clamps in/on the
unit

Tighten hose clamps with torque
wrench.
Torque:
28 mm nominal diameter: 2 Nm
29 mm nominal diameter: 6 Nm

Operator

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