Kärcher HD 6/16-4 M / MX Service Manual

Kärcher HD 6/16-4 M / MX Service Manual Manual pdf 19 page image

English 5.906-246.0 Rev. 01 (09/14) 19Upon closing the trigger gun, the pressure in the pressureroom rises abruptly. This pressure peak will affect the pis-ton rod and the pressure switch via the connecting boring.The ball is pressed out of its seat by the piston road andthe entire flow volume can flow to the suction room via theconnecting boring.The pressure switch switches off 2 of the 3 phases, thisway the motor is switched off.As soon as the trigger gun is closed, the pressure retainingvalve closes. This way the entire system pressure islocked between the trigger gun and the pressure retainingvalve.When the gun is opened again, the pressure in the systemdecreases rapidly, the overflow valve returns to its originalposition and the pressure switch switches the motor backon.1 Manometer2 Pressure holding valve3 Pressure room with pressure valves4 Pressure switch Q25 Connecting boring to overflow valve6 Overflow valve ball7 Connecting boring to suction room8 Piston rod9 Connecting boring from the overflow valveto the control pressure injector10 Detergent injector11 High pressure outlet12 Control pressure injector