Description

Overview

This camshaft washer circlip kit Rockwell locks the S camshaft hardware stack in place on Rockwell ATN and ATL trailer axles. It suits 1-5/8 inch S cam brake assemblies where correct end float and axial retention are critical for stable braking. As a result, it helps support consistent brake action over long service intervals.

Features

The kit combines a matched camshaft washer and external circlip so you can renew worn hardware in one job.

• Matched washer and circlip set for straightforward replacement during service
• Washer supports the camshaft hub and spreads load across the bracket face
• Circlip snaps into the groove on the 1-5/8 inch camshaft to help prevent unwanted axial movement during braking
• Together they help maintain alignment of the S cam, bush kit and slack adjuster

Specifications and Materials

Part number: FB3111.
This camshaft washer and circlip kit suits Rockwell S cam brakes that use a 1-5/8 inch camshaft on ATN and ATL axle families. It replaces the standard washer and circlip at the bracket end of the camshaft stack. Components in this class are typically hardened steel so they handle repeated brake cycles and resist wear at the contact faces. For broader guidance on heavy trailer S cam brake system design, refer to the heavy trailer braking systems design rule

Compatibility and Fitment

This camshaft washer circlip kit Rockwell is intended for Rockwell ATN and ATL camshafts on heavy trailer axles running 1-5/8 inch S cam brakes. When you install the kit, seat the washer firmly against the support face and confirm the circlip snaps fully into the camshaft groove so end float stays within the axle maker’s specifications.
This cross-reference listing means this part is a suitable replacement for the part numbers and applications shown. Rockwell ATN camshafts, Rockwell ATL camshafts, Rockwell ARN and ATN axles with 1-5/8 inch S camshafts, BP3111, WT3111, 01.0122.00, 43.8354A

Compliance and Safety

Heavy trailer foundation brake work must follow workshop procedures and the relevant fleet maintenance standards, and a trained technician should check the finished job. Always replace distorted washers or circlips rather than trying to straighten or reuse them. After any camshaft hardware work, check brake chamber stroke, slack adjuster position and S cam bush condition so the brakes keep operating within safe limits.

Trailer Applications

This camshaft washer circlip kit Rockwell suits Rockwell ATN and ATL axle sets used on semi-trailers, dog trailers and other heavy combinations running S cam foundation brakes. Workshops typically install it at the bracket end of the camshaft during brake overhauls, scheduled camshaft rebuilds or whenever the original hardware shows wear or loss of tension. The camshaft washer circlip kit Rockwell is commonly replaced as part of a broader camshaft service when bushes and related hardware are renewed.

Cross-reference and Suitability

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

Before ordering, match these cross-reference details against the axle identification plate and existing hardware. If any doubt remains, measure the current camshaft and washer stack to confirm that a 1-5/8 inch S camshaft kit is correct for your trailer.

Why Choose ICS Trailers

ICS Trailers specialises in heavy trailer parts, so you get practical support for S cam foundation brake repairs. Our listings for parts like this camshaft washer circlip kit Rockwell are researched against recognised brake and axle references to help you choose hardware that fits first time. In addition, the team can assist with related bush kits, seals, rollers and brake shoe hardware to complete the job. Browse similar hardware in our Foundation Brakes category at ICS Trailers