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4051039 Brake Caliper Pin Dust Boot, Air Disc Brake Caliper
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4051039 Compatible Brake Caliper Pin Dust Boot

4051039

Summary

This brake caliper pin dust boot is designed for heavy commercial vehicle braking systems, ensuring the slide pins remain protected from road salt, mud, and dust. Compatible with Renault Trucks and Volvo braking systems to maintain smooth caliper movement. Equivalent to OE Renault Trucks 7421748972, Volvo 21748973 and WABCO 6403199222.

Product identifiers
EAN Code8683457035805
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Compatible OEM Codes

  • WABCO
    • 640 319 922 2
  • VOLVO
    • 21748973
  • RENAULT TRUCKS
    • 7421748972

Description

What does a brake caliper pin dust boot do?

The brake caliper pin dust boot serves as a critical sealing element within the air disc brake system. By acting as a flexible barrier, it protects the guide pins from environmental contaminants such as water, road salt, and brake dust. This protection is essential for preventing seizing and ensuring the caliper slides smoothly during every braking application.

Vehicle compatibility and fitment

This component is compatible with Renault Trucks and Volvo vehicles. It is designed to function effectively within heavy commercial vehicle braking systems, providing a reliable seal that maintains grease within the pin bore while keeping external debris out.

Installation and maintenance

For optimal performance, these boots should be inspected during every brake pad change or routine brake service. It is recommended that installation is performed by a workshop technician using high-strength components and appropriate lubricants to ensure long-term durability and system integrity.

Troubleshooting and service

Regular maintenance of the caliper pin assembly helps prevent uneven pad wear and ensures consistent braking force across the axle.

OE cross-reference

4051039 (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.

Other OEMs

RENAULT TRUCKS

  • 7421748972

VOLVO

  • 21748973

WABCO

  • 6403199222
  • 640 319 922 2

Related Products

Repair Kits

Used In

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
RENAULT TRUCKS
VOLVO
WABCO

FAQ

What is the function of a caliper pin dust boot?
The boot acts as a bellows-shaped seal that prevents water, mud, and road salt from entering the guide pin assembly, ensuring smooth caliper movement.
Which vehicles are compatible with this component?
This part is designed for use in Renault Trucks and Volvo heavy commercial vehicles to maintain optimal braking performance.
When should I inspect the caliper pin boots?
It is recommended to inspect these seals during every brake pad replacement or during routine inspections of the vehicle's braking system.
How does a damaged boot affect the brakes?
A damaged boot can allow contaminants into the pins, potentially leading to sticking calipers, uneven pad wear, or reduced braking efficiency.
What are the OE reference numbers of this part?
4051039 directly replaces Renault Trucks OE number 7421748972. It also replaces Volvo OE number 21748973 and WABCO OE number 6403199222.