Saturday, August 8, 2015
How to repair / fix the Karcher K620m Pressure Washer
Karcher K620m Pressure Washer
The Karcher K620m Domestic use pressure washer was available from the mid 1990's until around 2005. It featured a robust induction motor with plenty of power. The jet cleaner being part of Karcher 6 Series was part of their premium range of machines and came with a longer 9 mtr hose, the trigger gun featured a pressure gauge.Faults :
Pressure switch sticking
Cause: Lack of use - the machine power light illuminates but the machine seems dead.Remedy Strip and clean or replace the karcher spool valve a.k.a. unloader, dump valve, t-stop, pressure relief, blow off valve
YouTube repair video:
Pump head distortion.
Cause: Failure of the pressure switch to stop the machine when the user releases the trigger.
Remedy: As above but you may also need to replace the karcher k620m pump head manifoldCapacitor start up buzzing
Cause: The user extending the electrical cable with a light duty extension cable. The extension cable restricts the flow of electricity and this caused the capacitor to overheat and sometimes burst
Remedy: Upgrade your extension cable or buy a karcher extension hose instead of the cable you will also need to replace the capacitor.
Remedy: Upgrade your extension cable or buy a karcher extension hose instead of the cable you will also need to replace the capacitor.
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