Setting The Minimum Working Pressure - Kärcher HDS 7/12 M Service Manual

7.50.2 Setting the minimum working pressure

8 Care and maintenance
Service group does not contain any maintenance and in-
spection points.
116
English 5.906-432.0 Rev. 00 (06/15)
1 Adjustment screw, high pressure
2 Lock nut, adjustment screw, high pressure
3 Spindle, pressure and quantity regulation
4 Adjustment screw, low pressure
5 Lock nut, adjustment screw, low pressure
6 Housing, overflow valve
 Fasten the test manometer to the high-pressure con-
nection.
 Connect high-pressure hose with standard gun to the
test pressure gauge.
 Install the new high pressure nozzle.
 Open standard gun.
 Turning on the appliance.
 Rotate the rotating handle of the pressure regulator on
the pump anti-clockwise (direction "-") all the way to the
stop.
 Pull off the rotary handle.
 Loosen the locknut of the adjustment screw for low
pressure.
 Turn the adjustment screw low pressure and the spin-
dle until the minimum working pressure is reached.
Note
If this screw is turned clockwise, the pressure is increased;
and if it is turned counter-clockwise, the pressure is de-
creased.
 Secure the adjustment screw for low pressure by tight-
ening the locknut.
 Check the working pressure, feed volume and switch
points of the pressure switches.
 Then seal this setting.
Note
With minimum pressure and volume adjustments and
when using the supplied steam nozzle, the pressure must
not exceed 32 bar.