Wabco 9121420020 is a single-cylinder air compressor with a 318 cc displacement, listed for Mack. The compressor is the pump that fills the vehicle's air tanks with the compressed air the brake system depends on, so a worn one tends to announce itself with a loud knock or grind each time it cycles on, or with a lot of oil showing up when the tanks are drained. Catching those signs early keeps the brake air supply dependable. A genuine Wabco part from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Single-cylinder air compressor
318 cc displacement
Listed for Mack
Wabco part number 9121420020
Fills the air tanks the brake system runs on
