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4051027 Brake Caliper Pin Dust Boot, Air Disc Brake Caliper
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4051027 Compatible Brake Caliper Pin Dust Boot

4051027

Summary

This brake caliper pin dust boot and pin set is designed for heavy commercial vehicle braking systems. It provides a reliable seal to protect caliper guide pins from road salt and debris. Compatible with Renault Trucks and Volvo systems, ensuring smooth axial movement for floating calipers. Equivalent to OE Renault Trucks 7421748963, Volvo 21748964 and WABCO 6403179222.

Product identifiers
EAN Code8683457006966
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Compatible OEM Codes

  • WABCO
    • 640 317 922 2
  • VOLVO
    • 21748964
  • RENAULT TRUCKS
    • 7421748963

Description

What does a brake caliper pin dust boot do?

This brake caliper pin dust boot serves as a critical sealing element within the air disc brake system. It protects the guide pins from water, mud, and corrosive road salt, ensuring that the caliper slides smoothly during every braking application. By maintaining a seal between the pin and the bore, it prevents contaminants from reaching the lubrication layer.

Vehicle and system compatibility

This component is specifically designed for use in Renault Trucks and Volvo vehicles. It is also fitted to other heavy commercial vehicle applications within WABCO caliper systems. Ensuring these seals are intact is vital for maintaining consistent braking performance and preventing pin seizure.

Installation and maintenance guidance

For optimal performance, these components should be installed by a workshop technician using correct grease and torque specifications. Regular inspection during routine brake pad changes is recommended to prevent premature wear of the caliper mechanism.

Troubleshooting guide

Maintaining high-quality seals helps prevent uneven pad wear and reduces the risk of caliper sticking.

OE cross-reference

4051027 (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 7421748963. It also replaces Volvo OE number 21748964 and WABCO OE number 6403179222.

Other OEMs

RENAULT TRUCKS

  • 7421748963

VOLVO

  • 21748964

WABCO

  • 6403179222
  • 640 317 922 2

Related Products

Repair Kits

Used In

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
RENAULT TRUCKS
VOLVO
WABCO

FAQ

What is the function of a brake caliper pin dust boot?
It acts as a flexible bellows that protects the slide pins from water, mud, and brake dust, keeping grease inside the assembly.
Which vehicle brands are compatible with this part?
This component is designed for Renault Trucks and Volvo vehicles, as well as compatible with WABCO caliper systems.
When should I inspect the caliper pin boots?
It is recommended to inspect these seals during every brake pad change or during routine heavy vehicle brake checks.
What happens if the dust boot is damaged?
A damaged boot can allow contaminants into the pin bore, leading to seized pins and uneven braking performance.
What are the OE reference numbers of this part?
4051027 directly replaces Renault Trucks OE number 7421748963. It also replaces Volvo OE number 21748964 and WABCO OE number 6403179222.