7000 903 500 Compatible Cylinder Liner Set — Mercedes-Benz MAN

What does a cylinder liner set do?

This compressor cylinder liner set is a specialized service kit designed to restore the cylinder bore surface where the piston travels inside an air brake compressor. By replacing the worn liner, technicians can effectively rebuild the compression chamber without requiring a complete housing replacement, making it a highly efficient solution for maintaining pneumatic system integrity.

Compatibility with Mercedes-Benz and MAN

This component is specifically engineered to fit Mercedes-Benz and MAN applications. It serves as a critical replacement part for heavy commercial vehicle compressors, helping to resolve issues such as pressure loss or excessive air leakage caused by internal wear. The set is designed to maintain original tolerances required for heavy-duty operation.

Installation and maintenance guidance

During installation, technicians should ensure the cylinder bore is thoroughly cleaned of all old residue before seating the new liner. Proper alignment and correct seating are vital to prevent future pressure drops. It is recommended to inspect the piston rings simultaneously to ensure a complete seal within the restored compression chamber.

Troubleshooting pressure loss

Regular inspection of the liner surface can prevent sudden failures in the air brake system. If symptoms like oil consumption or reduced air pressure build-up occur, this liner set provides a robust solution for restoring compressor performance.

OE cross-reference

7000 903 500 (Compressor Cylinder Liner Set) is the equivalent of the MAN and Mercedes-Benz OE numbers. This part directly replaces MAN OE numbers 51541050003, 51541050007, 51541056003, 51541056006, 51541190001, 51541190003, 51541190005, 51541190006, 51541190014, 51541197001, 51541197003. It also replaces Mercedes-Benz OE numbers 4031300008, 4031300117, 4031310002, 4421300002, 4421300008.