51 54122 0003 Compressor Safety Valve for MAN HOCL Engines

What does a compressor safety valve do?

This compressor safety valve serves as a critical protection component within the pneumatic air brake system. By maintaining pressure within safe operational limits, it prevents over-pressurization, thereby protecting both the compressor unit and the downstream braking components from potential damage during heavy-duty operation.

Compatible MAN HOCL vehicles and engines

This component is specifically fitted to MAN HOCL vehicles, including models such as the 24.480 HOCLN, 18.310 HOCL-NL, and 18.400 HOCL, as well as the 18.430, 18.440, 18.460, 24.440 HOCLN, 18.360, 18.480, 24.460 HOCLN, and 18.320 HOCL-NL models equipped with D2676 engines. It is an essential replacement part for maintaining system integrity in these heavy commercial vehicle applications.

Installation and maintenance guidance

The valve features an M26 port connection and is rated for a 17 BAR operating pressure. For proper installation, technicians should ensure the connection is seated correctly to prevent air leaks and verify that the relief threshold aligns with the specific requirements of the MAN HOCL compressor assembly.

Troubleshooting and reliability

Regular inspection of the safety valve during routine brake system maintenance can help prevent unexpected pressure surges. Replacing worn or faulty valves with high-strength components ensures continued reliability for fleet operators and workshop technicians alike.

OE cross-reference

7700 920 001 (Compressor Safety Valve) is the equivalent of the MAN OE number. This part directly replaces MAN OE number 51541220003.