4421001 Mechanism Repair Kit for Air Disc Brakes

What does a mechanism repair kit do?

A mechanism repair kit is a specialized component set used to renew the internal force-transmission and automatic adjustment assembly within air disc brake calipers on heavy commercial vehicles. By replacing worn internal parts such as seals, gaskets, and bushings, this kit restores proper pad clearance and braking force without the need to replace the entire caliper assembly.

Vehicle and system compatibility

This mechanism repair kit is compatible with heavy commercial vehicles from manufacturers including DAF, Iveco, MAN, Scania, Volvo, Mercedes-Benz, Freightliner, and Neoplan. It is specifically designed to work seamlessly with WABCO systems to ensure reliable braking performance across diverse fleet applications.

Installation and maintenance guidance

To ensure optimal performance, technicians should inspect the piston bushings and sealing elements during installation. Regular maintenance of the caliper mechanism helps prevent uneven pad wear and maintains consistent pedal response. Always check for leaks or irregular movement in the adjuster spindle during routine service intervals.

Braking system reliability

Maintaining the integrity of the braking system is essential for safety in heavy commercial operations. Using high-strength components helps prevent premature failure of the caliper mechanism under heavy load conditions.

OE cross-reference

4421001 (Mechanism Repair Kit) is the equivalent of the Daewoo, DAF, Dennis, Freightliner, Iveco, MAN, Neoplan and WABCO OE numbers. This part directly replaces Daewoo OE number Z366338122. It also replaces DAF OE number FBU1069, Dennis OE number 6532516, Freightliner OE number TBBD6532516, Iveco OE number 8121308, MAN OE numbers 81976100190, 81976100190, N1011013014, Neoplan OE numbers 11013014, 70142005 and WABCO OE number 13301191.