Kärcher HD 20/15-4 Service Manual

Also see for HD 16/15-4: Manual

Kärcher HD 20/15-4 Service Manual Manual pdf 21 page image

English 5.906-494.0 Rev. 01 (04/11) 21The removed piston with springs and seal set Adhere to the sequence of the seal set and thesprings when assembling. The seal set includes an O-ring 14x1,5-NBR 70. Open the screw connection. Replace the support ring and the O-ring. During the assembly, ensure the correct installa-tion sequence of the O-ring and the support ring.NoteGrease all O-rings with Ontropeen (part number:6.288-088.0 5 grams, 6.288-079.0 100 grams). Fillthe hollow spaces with grease. Reassemble the hand spray gun in the reverse se-quence.1 Ceramic disc on spray pipe side2 Ceramic disc on gun sideThe ceramic disc on the gun side is rigidly connectedto the gun connection. The ceramic disc on the spraypipe side is connected to the regulator and thereforeadjustable.Offset holes in the ceramic discs can adjust the flowvolume when rotating the discs. This illustrationshows the two overlapping ceramic discs and the wa-ter flow (blue) with different opening angles (from 0°to 90°).With the minimal setting, the water flows through asmall hose in the middle of the ceramic discs.Cross section of the power press regulator (gun side)1 Ceramic disc on gun side2 Casing of rotating regulator3 Connecting pin4 Handle of rotary regulator5.6.2 Adjustments on the power press regulator2 12134