Description

Overview

The outer bush general purpose spline end bush is designed as a heavy duty S cam support for general purpose trailer brake systems. It supports a 1.5 inch (38mm) camshaft and works with compatible cam brackets on Freighter MK V and similar trailer axles. This design helps keep the S cam aligned, so brake shoes apply evenly and wear in a controlled way. As a result, it suits workshops looking for a straightforward replacement bush for common Australian trailer brake setups.

Features

This outer bush general purpose spline end uses a stepped outer diameter to locate securely in the cam bracket. The 38mm inner diameter is sized for standard 1.5 inch trailer S cam shafts, which simplifies selection during service. Additionally, the spline end profile helps transmit torque reliably between the bush and cam assembly. In turn, it supports smoother S cam rotation and more consistent brake response over time.

Specifications and Materials

Length is approximately 63mm, with an inner diameter of 38mm and stepped outer diameters of about 52mm and 70mm to suit the matching cam bracket. These dimensions follow catalogue data for camshaft bushes used on trailer S cam brake systems, so they are suitable for general purpose camshaft service. Material for this specific part is not stated in the available catalogues; S cam bushes of this type are commonly supplied in durable engineered polymer or steel to cope with heavy braking loads. Part number: FB2101. For general guidance on S cam brake component maintenance and bushing service, refer to this detailed Meritor drum brake service manual.

Compatibility and Fitment

This bush is intended for general purpose trailer applications using 1.5 inch S cam shafts and compatible cam brackets, including Freighter MK V and similar round or I beam axle configurations. Correct fitment requires checking that the bracket bore and camshaft size match the stated dimensions before installation. 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. 03.2101.0, 154-00482, 515 150, 6585, FL27.1200, IT27.1200, RE3299G1541, T02-2101, WT2101, FP27.1200

Compliance and Safety

During brake service, always inspect the S cam, bush seats and seals for wear, scoring or corrosion, and replace any damaged components at the same time as the outer bush. Additionally, follow workshop safety procedures, support the trailer securely, and chock wheels before disassembly. It is good practice to replace bushes in pairs across an axle so braking remains balanced from side to side. After installation, verify free S cam rotation with no binding, then recheck brake adjustment after a short bedding in period.

Trailer Applications

This outer bush general purpose spline end is suited to heavy vehicle trailers using foundation drum brakes with 1.5 inch S cam shafts. Typical uses include general freight trailers, curtain-siders, tippers and other semi trailers that run Freighter, Rubery Owen and Fruehauf style axle and cam layouts. In many cases, it will pair with standard cam covers, seals and inner bushes used on the same S cam assembly, which helps streamline parts stocking for fleet operators and repairers. However, you should always compare dimensions and existing hardware before final fitment.

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 stocking proven trailer foundation brake parts so workshops can match replacement bushes quickly and confidently. Each listing is built from technical catalogues and industry references rather than generic descriptions, which helps reduce selection errors. In addition, ICS backs this outer bush with knowledgeable support so you can confirm suitability before ordering for your next S cam brake overhaul. Browse Foundation Brakes at ICS Trailers.