K21 - Overview

This OEM Grooved Ring is a 12 x 20 x 4/6 rubber ring which can be installed with a screwdriver and wrench set. Installation is rated as "Medium" difficulty. It attaches in the cylinder head and is used to keep the oil in the pump from mixing with the water. If broken it will leak and must be replaced.

This is a manufacturer sourced replacement part designed for use with Karcher pressure washers. This ring provides an air-tight seal for the cylinder head. Over time this ring will shrink, become brittle and crack allowing for air leaks. At that time it should be replaced. It is made out of rubber and it is sold individually. Replacing this item you would need hex key/allen wrench and pliers to replace this item.

This O-ring is a genuine part from original manufacturer. It is used with the cylinder head in Karcher pressure washers. An O-ring is a flexible circle which acts as a seal between rigid parts. It is a simple component but it is often essential for a machine to function correctly. Sold individually. Note that this ring is available with part # 9.001-104.0 Spare Parts Set.

This is an authentic OEM part made by Karcher for use in pressure washers. The connection fits next to the filter and the cover on one side and the hose coupling on the other. It is made of plastic and will need replacing if it breaks. A screwdriver might be needed during the installation process. This part is available as an individual replacement.

O-rings are flexible circles which are used to prevent leaks and maintain pressure. This part is an authentic OEM replacement ring used in Karcher pressure washers. These O-rings are used at the connection point between the machine and its hose. This set includes five (5) identical O-rings. Please note that the wand itself uses a separat...Read moree set of O-rings, part # 2.640-729.0 O-Ring Seal Set. Multiple other sizes of O-ring are used in various other spots on these machines; see manual for part numbers and placements.

This is a genuine OEM supplied part which is specially designed for use with Karcher pressure washers. The filter helps to remove dust and other contaminants from the water that goes through the pump. Over time it may wear out, get damaged or lost eventually requiring a replacement. To ensure the correct application, refer to the owners m...Read moreanual for your model. Keep in mind this high-quality filter is sold as an individual item.

This is an authentic Karcher replacement part manufactured for use with pressure washers. The special bush is used with the valve in the gun assembly. This bush is sold as an individual replacement part, please see model diagram for associative parts.

It is a genuine item that is supplied by the original equipment manufacturer for Karcher pressure washers. This is an identical replacement for a faulty or a missing metal fork that was installed on a new unit. To ensure the exact location and the correct replacement procedure, refer to the appropriate diagrams for your model. Note, this ...Read morehigh-quality fork is made of durable metal and is sold as an individual item. A screwdriver, a wrench set, and pliers might be needed to perform this repair.

This replacement soap diffuser hose is specially manufactured for use with Karcher pressure washers. It is the hose that the in-tank filter is attached to to deliver the soap needed for the unit. It is made from durable flexible rubber material and it is sold individually.

This manufacturer sourced replacement part designed for use with Karcher pressure washers. It is the essential part of the unit allowing to direct and control the spray. Please note the wand is sold separately. This pistol assembly is made out of plastic and it is sold individually.

This is an original Karcher replacement part. The gasket is designed by the manufacturer for use in pressure washers. This part is made of flexible rubber, and is generally used to seal the connection between components. It may be found in various locations in the machine. Please refer to the parts diagram to be sure of ordering the correct part. This product is sold individually.

These are authentic items that are supplied by the original equipment manufacturer for use with Karcher pressure washers. Generally, O-rings are utilized to provide a tight seal between connected components. Unfortunately, over time the material will wear out and it may begin to fail eventually requiring a replacement. Keep in mind this h...Read moreigh-quality kit includes three durable rubber O-rings. Check the diagrams for your model to ensure the correct repair procedure.