Description

Overview

Caliper thrust bearing shells provide controlled adjustment in Wabco style air disc brake calipers on heavy trailers. This replacement kit restores smooth, repeatable movement at the caliper adjuster so technicians can set running clearances with confidence. As a result, you help maintain even pad wear and stable braking performance across the axle set.

In many fleets the thrust bearing assembly runs in a harsh environment, so wear can creep in over time. Additionally, regular brake servicing creates a natural point to replace the caliper thrust bearing shells as a preventive task rather than waiting for obvious problems.

Features

• Matched caliper thrust bearing and shell set to suit Wabco style trailer air disc brake calipers.
• Designed to transmit axial loads from the manual adjuster into the caliper body while keeping rotation smooth and predictable.
• Helps reduce uneven pad wear and improves the consistency of final brake adjustment across wheels on the same trailer.
• Suitable for workshop brake overhauls, mid-life caliper service and preventative maintenance programs on heavy trailers.

Specifications and Materials

This kit includes a thrust bearing and corresponding shells sized for a Wabco trailer air disc brake caliper adjuster assembly. The components are built for axial load transfer in commercial vehicle brake service and are intended for use within the caliper housing rather than as standalone bearings.

Part number: FB2894.

Thrust bearings in this application typically use hardened steel raceways and rolling elements so they can handle high contact stresses under repeated brake applications while keeping friction controlled. For more general background on how bearings, including thrust bearings, support loads in machinery, refer to this bearing overview.

Compatibility and Fitment

This caliper thrust bearing shells kit suits selected Wabco trailer air disc brake calipers where the adjuster assembly uses a separate thrust bearing and shell pack in the inner end of the caliper body. Consequently, it is most often installed during a caliper strip, clean and rebuild.

This cross-reference listing means this part is a suitable replacement for the part numbers and applications shown. Some changes in installation may be required. Pan 17, Pan 19, Pan 22, 40 160…, 40 175…/195…, CWSK.12, 170K0144

Compliance and Safety

Correct adjustment of air disc brake calipers is critical for compliance with on-road braking performance requirements and heavy vehicle inspection standards. When the thrust bearing assembly wears, the adjuster can feel rough or inconsistent, which makes accurate setup difficult.

During any brake service, technicians should therefore inspect the thrust bearing and shells for corrosion, damage or flat spots. Additionally, always follow current Wabco service information and workshop safety procedures, including proper support of the axle and isolation of the air system before removing calipers.

Trailer Applications

This caliper thrust bearing shells replacement kit is suited to heavy trailers using Wabco air disc brakes, including semi-trailers, B-double combinations and other multi-axle equipment. It is particularly useful where trailers operate in dirty or corrosive environments that accelerate wear in the adjuster mechanism.

Fleet operators can incorporate replacement of the caliper thrust bearing shells into scheduled brake relines. In addition, workshops can use this kit when reconditioning calipers off the vehicle to return the adjuster feel close to new.

Cross-reference and Suitability

This part cross-references to or suits the following equivalent part numbers and compatible alternatives:

Why Choose ICS Trailers

ICS Trailers focuses on practical, workshop-ready foundation brake parts so you can keep heavy trailers working safely. Our team understands how disc brake components behave in real fleets and selects replacement kits that match the demands of Australian road conditions.

We support trailer builders, repairers and fleet maintenance teams with reliable parts supply, clear descriptions and responsive service so jobs can be planned and completed efficiently. Browse Foundation Brakes at ICS Trailers in our Foundation Brakes category.