51 54122 0011 Safety Valve for MAN HOCL D2676 Engines

What does a compressor safety valve do?

This safety valve serves as a critical pressure relief component within the pneumatic brake system. It functions by maintaining the air pressure generated by the compressor within safe operational limits, protecting both the compressor housing and the downstream pneumatic lines from overpressure conditions. Built with high-strength components, it provides reliable protection during intensive service cycles.

Compatible vehicles and engines

This component is specifically designed for MAN HOCL engines, including models such as the 24.480 HOCLN, 18.310 HOCL-NL, 18.400 HOCL, and 18.430 HOCL. It is also compatible with various other MAN HOCL configurations like the 18.440, 18.460, 24.440 HOCLN, 18.360 HOCL, 18.480 HOCL, 24.460 HOCLN, and 18.320 HOCL-NL. This part is engineered to match the specific requirements of the D2676 engine series.

Installation and maintenance

For professional installation, technicians should verify that the M26 port connection is clean and free of debris to prevent air leaks. The valve is rated for a maximum pressure of 17 BAR; ensuring this matches the system's regulator setting is vital for maintaining system integrity. Regular inspection of the valve housing and seals during routine brake system maintenance can help prevent unexpected pressure drops.

Troubleshooting and selection

When replacing this component, ensure that the mounting surface on the compressor is correctly seated to maintain a secure seal under high-pressure operation.

OE cross-reference

7700 920 001 (Compressor Safety Valve) is the equivalent of the MAN OE number. This part directly replaces MAN OE number 51541220011.