3094156 Volvo N12 TD122 Compressor Ring

What does a compressor ring do?

This compressor ring is a critical component within the air brake compressor system of heavy commercial vehicles. It is engineered to maintain proper compression and sealing within the cylinder, ensuring the consistent air pressure required for reliable braking performance. Built from high-strength components, this part is designed to withstand the intense thermal and mechanical stresses encountered during continuous operation.

Vehicle and engine compatibility

This specific ring set is designed for Volvo N12 trucks featuring the TD122 engine. It provides a precise fit for the piston grooves to prevent pressure loss or oil bypass. For optimal results, technicians should ensure the cylinder liner is in good condition and that the ring end-gap is checked according to the vehicle manufacturer's service manual.

Installation and maintenance

During maintenance or overhaul, it is essential to verify that the piston diameter and ring thickness match the existing grooves exactly. This component features a 75,00mm diameter with thickness specifications of 2,38mm and 3,94mm. Proper installation prevents common issues like ring chatter or seizure caused by incorrect groove fitment.

Selection guidance

When performing a compressor rebuild, always inspect the cylinder walls for wear. If the liner has been machined or honed, standard rings will not suffice; instead, an oversize class must be selected to ensure a proper seal.

OE cross-reference

752 200 (Compressor Ring) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 3094156.