Pressure Washer Replacement Parts | Control Valve Piston | 4.553-268.0

This control valve piston is one of the pressure washer replacement parts used when a K 7.20MX, K 720MX or K 7.21MX loses pressure. It is made from brass with 304 stainless steel and matches reference 4.553-268.0. In use the piston acts as an extra safeguard against overpressure: it opens the internal water passages and so lowers the pressure at the outlet. Features and benefits: - Brass and 304 stainless steel construction, made to replace the original piston reference 4.553-268.0 - Lowers the outlet pressure by opening the internal water passages, giving an added guard against overpressure - Suits the K 7.20MX, K 720MX and K 7.21MX models - A worn piston shows up as weak operating pressure, a pump that cuts in and out with the gun switched on, or no pressure at all while the pump runs: a new piston is a straightforward fix for these faults - Choose 1 piece or a pack of 2 pieces, handy if you service more than one machine - Photos show the part from several angles, so you can compare it with the piston you remove Applications: - Repairing a pressure washer that has lost operating pressure - Fixing intermittent running when the gun is switched on - Pump repair and overhaul on K 7.20MX, K 720MX and K 7.21MX machines - Keeping spare pistons in the workshop for cleaning contractors In the box: One or two control valve pistons, depending on the option chosen. Note: Switch off, unplug the machine and release the pressure in the pump and hose before removing any internal parts. Check the old part against the photos and the reference number before fitting.