Holman 185 CFM pressure valve open - blowing air
(Washington, MI, USA)
Holman 185 Compressor
During a recent job the machine began to run full blast. Found a burst hydraulic line and a pressure valve blowing air. The machine was quickly turned off and it did not run out of hydraulic fluid and didn't overheat. Replaced the line.
The compressor started fine except the valve is still blowing air and causing lower air pressure.
Have attached pictures of the compressor and the valve.
My questions are: Does this valve need to be replaced and what is it called? Or is this valve good and something else is wrong causing it to stay open and blow air? Need advice...
Holman 185 CFM Air Compressor
Compressor # RO175 P / 6190 NS ("RO175" could be ROA75 or RO275)
Ford 4 Cylinder Diesel Engine
Engine # 2701 E / S668848