Smith & Sons
New member
Got a 4000 PSI 3.5 GPM Cat Pump that when I fire up after refueling you can feel the pressure is low. I can shut down then restart and have all of my pressure back. This has happened more then once. I have left the machine running for a time with lower pressure but it never come back until I shut down and restarted What can be causing this? Is my unloader going bad?