# Adjustment of Pressure Relief Valve

The pressure relief valve is factory set to vent air if a too high air pressure is set, thus preventing the pump from generating more hydraulic pressure. Adjustment is not necessary.

Do not adjust the pressure relief valve. A plastic cover has been placed over the valve to prevent any adjustment.

If the pressure relief valve has been triggered by excessive compressed pneumatic air pressure, reduce the air pressure by rotating the adjustment cap on the filter regulator in an anticlockwise direction. This will allow the spring and ball bearing assembly in the pressure relief valve to reset. When reset, increase air pressure to 5 bar. Any questions, please contact Atlas Copco.