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symptoms are motor pulsing, low pressure, sounds like i need a cylinder head, but what else might cause same symptoms?
K 3.575, not very old but ran briefly without water supply when hose fitting blew
Answer this Question (2 Answers)
- If the seals look okay you may have a tiny crack in the cylider head or the control head, especially if you have ever let it freeze. Basically if there is no external water leak you have an internal pressure leak - a valve or crack is most likely. Cylinder head eliminates most things as it is a complete assembly and very inexpensive. Control head is next most likely for an invisible leak, but is not so inexpensive, and more individual to the models. You can run these for several seconds without water supply without damage, and as the topseals are in the cylinder head assembly this is well worth a try.
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Chris at eSpares says...
It is likely if the problem occurred immediately after running with no water that the seals of the pump have been damaged and this part should resolve your problem.
Genuine Pressure Washer Cylinder Head Stock Number: ES538413
Genuine spare part for select models of Karcher pressure washers
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