Kärcher HD 20/15-4 Service Manual

Also see for HD 16/15-4: Manual

Kärcher HD 20/15-4 Service Manual Manual pdf 16 page image

16 English 5.906-494.0 Rev. 01 (04/11) Loosen both hollow screws at the same time to re-move the overflow casing in order not to damagethe O-rings.1 Adjustment screw, high pressure2 Lock nut, adjustment screw, high pressure3 Spindle, pressure and quantity regulation4 Adjustment screw, low pressure5 Lock nut, adjustment screw, low pressure6 Housing, overflow valvePreparation Fasten the test manometer to the high-pressureconnection. Connect the high-pressure hose with the servopress hand spray gun to the test manometer.Setting the maximum working pressure: Rotate the servo press to the "MIN" position, openthe hand spray gun and let the device run. Turn in the rotary handle of the pressure andquantity regulation until it stops (MAX value). Pull off the rotary handle. Loosen the locknut for high pressure. Turn the adjustment screw high pressure so thatthe pressure display on the test manometerequals the maximum working pressure in theChapter "Specifications". Secure the adjustment screw for high pressure bytightening the locknut. Seal the adjustment screw for high pressure andthe lock nut with locking paint.Setting the minimum working pressure: Install thenew high pressure nozzle. Rotate the servo press to the "MAX" position,open the hand spray gun and let the device run. Pull off the rotary handle. Loosen the locknut for low pressure. Turn the adjustment screw low pressure and thespindle for pressure/quantity regulation at thesame time, so that the pressure display on the testmanometer equals the minimum working pressurein the Chapter "Specifications". Secure the adjustment screw for low pressure bytightening the locknut. Seal the adjustment screw for high pressure andthe lock nut with locking paint.5.4.5 Regulate the working pressure by means ofthe rotary know on the gun