Introduction
Prerequisite guide only! Pump rebuild steps before removing the pump from the motor housing. Written for the Karcher Pressure Washers 15209900 2018.
Tools
Parts
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            Use a pair of pliers to grasp the blue tab on the excess current valve. 
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            Pull firmly to extract the excess current valve from the pump assembly. 
 
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            Lubricate the replacement valve's O-rings with the grease included in the rebuild kit. 
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            Press the replacement valve back into the pump. 
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            Replace the cover plate with a new one from the rebuild kit. 
 
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            Use pliers to grasp the tip of the fine filter in the water intake connector. 
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            Pull the fine filter out of the intake. 
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            Replace the fine filter with a new one from the rebuild kit. 
 
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            Use a hammer and pin punch to tap the cylinder head plate out of its groove. 
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            Remove the cylinder head plate. 
 
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To reassemble your device, follow these instructions in reverse order.