UNLOADER OVER ADJUSTED

Unloader valves can be adjusted up to the pressure they are designed for, providing you have the pump and horsepower to reach that pressure.  If your unloader is sized to your machine then it's likely you do not have your unloader over-adjusted.  

Unfortunately many manufacturers simply do not care what unloader the put on their machines so you could have an unloader that can be over-adjusted.  When you see the over adjustment is when the pump is on bypass and you have a trapped pressure (hard), unloader.  This is not an issue with a flow (soft) unloader.  For more discussion on various unloaders click here. 

With a hard unloader you should set the pressure with the trigger pulled and machine running at operating speed.  Turn the unloader valve counterclockwise all the way.  This will reduce the pressure to almost zero.  Then turn it clockwise to the desired pressure.  When you release the trigger the pressure should spike to approximately 300 PSI more than what you set it for.  If the pressure spikes beyond that then the unloader is set too high,  for the unloader.  You will need a pressure gauge do this.  

For more discussion on pressure gauges click here.  

To see prices click here.