8000 850 005 Volvo & Mack Connecting Rod & Piston

What does a compressor connecting rod and piston do?

The compressor connecting rod and piston group is essential for the pneumatic compression process within the air brake system. The connecting rod transmits the crankshaft's rotary motion to the piston, which then compresses air inside the cylinder to generate the pressure required for the brake reservoirs. This assembly is critical for maintaining consistent air output and minimizing oil consumption.

Vehicle and engine compatibility

This component is engineered for heavy commercial vehicles, including Volvo models like FH, FM, VHD, and VNL, as well as Mack Pinnacle and Granite series. It is also compatible with Renault Trucks Premium and Magnum models. These parts are specifically matched to ensure precise fitment within WABCO systems used across various engine configurations such as D12, D13, and MP8.

Installation and maintenance guidance

When replacing these internal components, technicians should inspect the cylinder liner and valve assembly to prevent premature wear. Maintaining proper lubrication in the compressor assembly helps extend the service life of the piston and rod. Check the compatibility list to ensure correct fitment for your specific engine model.

Troubleshooting compression performance

Monitoring for increased running noise or reduced air pressure can indicate that these internal components require attention. Regular inspection of the compression assembly is a key part of preventative maintenance for heavy-duty fleets.

OE cross-reference

8000 850 005 (Compressor Connecting Rod & Piston) is the equivalent of the Volvo and WABCO OE numbers. This part directly replaces Volvo OE number 22306613. It also replaces WABCO OE numbers 4127049422, 4127049432.