Setting The Working Pressure With Standard Gun Without Rotary Knob - Kärcher HDS 7/12 M Service Manual

7.50 Setting the working pressure with standard gun without rotary knob

7.50.1 Setting the maximum working pressure
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.
 Screw in the twist grip of the pressure and volume reg-
ulation on the pump all the way to the stop (towards
"+").
 Pull off the rotary handle.
 Loosen the locknut of the adjustment screw for high
pressure.
 Turn the adjustment screw high pressure in a way that
the opening pressure of the overflow valve is reached
on the test manometer.
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 high pressure by tight-
ening the locknut.
 Check the working pressure, feed volume and switch
points of the pressure switches.
 Then seal this setting.
Note
The maximum working pressure is set with the standard
gun without control knob.
English 5.906-432.0 Rev. 00 (06/15)
115