4051031 Caliper Pin Dust Boot Compatible with Volvo and Renault

What does a brake caliper pin dust boot do?

The brake caliper pin dust boot serves as a flexible sealing element that protects the slide pins from environmental contaminants such as water, mud, and road salt. In heavy commercial vehicle braking systems, the floating caliper must move smoothly along these pins to ensure even pad wear and consistent braking force. This component prevents debris from entering the pin bore, which is critical for maintaining system integrity.

Compatible vehicles and engines

This part is specifically designed for use in Renault Trucks and Volvo heavy commercial vehicles. It provides an essential seal for the caliper mechanism to ensure reliable performance under heavy-duty conditions. The component is also compatible with WABCO systems used in various truck and bus applications.

Installation and maintenance

For optimal performance, these boots should be inspected during every brake pad replacement or routine brake system check. When performing maintenance, ensure the pins are cleaned and lubricated with the correct grease before installing the new boot. Professional installation by a workshop technician is recommended to ensure the seal is seated correctly.

Troubleshooting guide

Regular inspection of the guide pin area helps prevent sticking or seizing of the caliper mechanism, which can lead to uneven pad wear or reduced braking efficiency.

OE cross-reference

4051031 (Brake Caliper Pin Dust Boot) is the equivalent of the Renault Trucks, Volvo and WABCO OE numbers. This part directly replaces Renault Trucks OE number 7421748972. It also replaces Volvo OE number 21748973 and WABCO OE number 6403199222.