PRESSURE WASHER TROUBLE SHOOTER
       Tech Tips and Troubleshooting
 

       Listed below is the problem you selected with causes, solutions and discussion

NO UNLOADER / BYPASS VALVE

Install correct components

If this is a new machine or you just purchased it used. there is a remote possibility the pump has no bypass (unloader) valve.  

Generally a pump will only work once if the trigger gun is shut when there is no unloader or bypass valve on the pump.  

Pressure washer pumps are positive displacement, meaning that if the pump turns it has to pump.  If there is no place for the water to go something has to give. 

Click here for more discussion on pumps.  

If there is no unloader valve and you release the trigger on the gun your in for a potential catastrophic failure.  Best case scenario is that your motor or engine will stall.  Worst case is you will see parts flying out of the side of the pump, hopefully not at your head.    

It is absolutely critical that an unloader valve is installed, unless you are working with an open system with no shut-off devices downstream from the pump.    

Click here for more discussion on unloader valve.  

Click here for further discussion on protecting your pump.

 SOME OF THESE OPERATIONS CAN BE EXTREMELY DANGEROUS.  IF YOU DO NOT HAVE SUFFICIENT TRAINING IN THESE PROCEDURES, WE RECOMMEND YOU SEEK ASSISTANCE FROM A 
QUALIFIED TECHNICIAN



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