21136656 Piston and Ring for Volvo FM12 D12C

What does a piston and ring do?

This compressor piston and ring set serves as a critical component within the air brake compressor assembly, facilitating the necessary compression for the pneumatic braking system. Manufactured from high-strength components, these parts are designed to withstand the intense thermal and pressure cycles typical of heavy commercial vehicle operation.

Compatible vehicles and engines

This specific kit is designed for Volvo FM12 trucks equipped with D12C engines. It is an essential replacement part for maintaining the efficiency of the air compressor system in these heavy-duty applications. Consult your authorized distributor to confirm exact fitment.

Installation and maintenance

To ensure correct installation, technicians should verify the piston diameter and cylinder conditions before assembly. Proper lubrication during the installation of the rings is vital to prevent initial wear. Always check the compressor housing for any signs of liner scoring before installing these new high-strength components.

System maintenance guidance

Maintaining regular inspection intervals for compressor internals can prevent sudden system pressure loss and ensure consistent braking performance across the vehicle's fleet.

OE cross-reference

7000 801 100 (Compressor Piston & Ring) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21136656.