Basic Settings And Service Procedures; Setting The Maximum Working Pressure; Setting The Minimum Working Pressure; Adjusting The Full Load Speed (Pe Model Only) - Kärcher HD 9/50-4 Cage Service Manual

5

Basic settings and service procedures

5.1

Setting the maximum working pressure

1 Adjustment screw, high pressure
2 Lock nut, adjustment screw, high pressure
3 Spindle of the pressure/quantity regulation
4 Adjustment screw, low pressure
5 Lock nut, adjustment screw, low pressure
6 Housing of the overflow valve
Fasten the test manometer to the high-pressure connection
(Pmax = 100 MPa).
Connect the high-pressure hose with the hand spray gun and
the spray lance to the test manometer.
Turn in the rotary handle of the pressure/quantity regulation un-
til it stops (max. working pressure).
Pull off the rotary handle.
Fastening the test nozzle:
HD 9/50, 400 l/h at 40 MPa (400 bar)
HD 13/35, 300 l/h at 58 MPa (580 bar)
Warning
Strong heating up.
Turning on the appliance.
Press the lever on the hand spray gun.
Loosen the locknut for high pressure.
Turn the adjustment screw high pressure so that the pressure
display on the test manometer equals the maximum working
pressure in the Chapter "Specifications".
Note
Turn in clock-wise direction to increase the working pressure.
Turn in counterclockwise direction to decrease the working pres-
sure.
Secure the adjustment screw for high pressure by tightening
the locknut.
Install a new high pressure nozzle and check whether the work-
ing pressure is reached.
Check the feed volume and switch points of the pressure
switch.
Seal the adjustment screw for high pressure and the lock nut
with locking paint.
34
English 5.906-441.0 Rev. 01 (06/10)
5.2

Setting the minimum working pressure

Fasten the test manometer to the high-pressure connection.
Connect the high-pressure hose with the hand spray gun and
the spray lance to the test manometer.
Install thenew high pressure nozzle.
Turning on the appliance.
Press the lever on the hand spray gun.
Turn in the rotary handle of the pressure/quantity regulation
counter-clockwise until it stops (min. working pressure).
Pull off the rotary handle.
Loosen the locknut for low pressure.
Turn the adjustment screw low pressure and the spindle for
pressure/quantity regulation at the same time, so that the pres-
sure display on the test manometer equals the minimum work-
ing pressure in the Chapter "Specifications".
Note
Turn in clock-wise direction to increase the working pressure.
Turn in counterclockwise direction to decrease the working pres-
sure.
Secure the adjustment screw for low pressure by tightening the
locknut.
Check the feed volume and switch points of the pressure
switch.
Seal the adjustment screw for low pressure and the lock nut
with locking paint.
5.3

Adjusting the full load speed (PE model only)

Fit the spray lance with the new nozzle.
Start the engine
Press the lever on the hand spray gun.
Loosen locknut on the speed adjustment.
Adjust the operating speed (see "Specifications") on the set
screw for the motor speed.
1 Locknut on the speed adjustment
Tighten the locknut of the speed adjustment.