The unloader valve kit includes the o ring and all parts needed for the repair.
Excell pressure washer unloader valve location.
The system pressure depends on the setting of the unloader.
Many videos write ups show that you can try to free a stuck pin to repair it.
That s not necessarily true.
The unloader only relieves the pressure once it reaches a certain p s i.
Usually this pressure setting is higher than the system pressure while you are spraying.
One of them is a sticking unloader valve.
For example if your washer produces 1000 psi while you are spraying the unloader should not unload until the pressure exceeds the 1000psi.
Conversely if the unloader valve won t close water pressure to the spray nozzle decreases drastically.
On the other hand when you release the trigger the unloader valve redirects the flow of water towards the inlet valve.
If the pressure washer unloader valve isn t working replace it using the manufacturer approved replacement part.
Troubleshooting shows that it s likely the unloader valve.
When your pressure washer has its pressure gun depressed the unloader valve ensures the flow of water towards the nozzle.
If the unloader valve clogs or won t open the thermal release valve opens and sprays steamy water from the pump.
Only a mild pour would come out when engaged and engine and all runs fine.