English 5.906-494.0 Rev. 01 (04/11) 25The status of the attached circuit diagram representsthe creation date of the service manual. This circuitdiagram is not updated. When working on the device,please always use the current circuit diagram inKärcher-Inside.7.1 Technical DocumentationAppliance type Order number Circuit diagram operating instruc-tionsSpare parts listHD 25/15-4 Cage 1.367-121.0 0.089-091.0 5.963-304.0 5.971-040.0HD 20/15-4 Cage 1.367-131.0 0.089-091.0 5.963-304.0 5.971-077.0HD 16/15-4 Cage 1.367-105.0 0.089-091.0 5.963-304.0 5.971-077.08 Circuit diagram9 Special toolsSpecial tool HP 25/15-4 and 20/15-4, piston diameter 25 mm Order numberPliers to remove the rings and seats 4.901-062.0Inner driver, diameter 14.5 to 18.5 mm 6.815-013.0Installation mandrel, high and low pressure seal 6.815-211.0Installation sleeve, high pressure seal 6.815-214.0Installation mandrel, oil seal 6.815-223.0Insertion tool, crown wrench 6.815-209.0Special tool HP 20/15-4, piston diameter 25 mm Order numberPliers to remove the rings and seats 4.901-062.0Inner driver, diameter 14.5 to 18.5 mm 6.815-013.0Installation mandrel, high and low pressure seal 6.815-257.0Installation sleeve, high pressure seal 6.815-256.0Installation mandrel, oil seal 6.815-258.0Special tool HP 16/15-4, piston diameter 22mm Order numberPliers to remove the rings and seats 4.901-062.0Inner driver, diameter 14.5 to 18.5 mm 6.815-013.0Installation mandrel, high and low pressure seal 6.815-257.0Installation sleeve, high pressure seal 6.815-256.0Installation mandrel, oil seal 6.815-258.0