Description

Overview

The flanged inner bush 1.5 inch camshaft configuration supports the S-cam shaft in heavy trailer foundation brakes. It sits in the brake spider or hanger bracket and keeps the camshaft running true under load. As a result, brake timing stays consistent and lining wear remains even across the axle set.

Features

• Flanged inner bush profile that positively locates the camshaft and limits end float in the brake assembly.
• Machined 38mm internal diameter to suit common 1.5 inch brake camshafts used on heavy trailers and trucks.
• Outer diameter of 48mm to match typical brake spider or bracket housings for straightforward service replacement.
• Robust steel construction that handles high contact loads and repeated brake applications in demanding fleets.

Specifications and Materials

Part number: FB2221.
Length: 40mm nominal.
Internal diameter: 38mm nominal to suit 1.5 inch camshafts.
Outer diameter: 48mm nominal.
Material: precision machined steel bush with an integral flange for axial retention.
Technicians typically install this bush as part of a full S-cam brake reline or camshaft overhaul, using suitable drivers and following OEM torque and setup data. For broader technical context on cam brakes and camshaft bushings, refer to this Meritor cam brake maintenance manual

Compatibility and Fitment

This flanged inner bush suits 1.5 inch S-cam brake camshafts where the housing bore accepts a 48mm outer diameter bush and a 40mm length. You should measure the existing camshaft and housing before ordering, then confirm that the length and diameters match your current hardware. In addition, always check camshaft journal wear, spider bores and cam head condition when replacing bushes so you restore the full brake assembly, not just one worn component.

Compliance and Safety

Correctly fitted camshaft bushes help brakes meet roadworthy standards by keeping the S-cam aligned and free of excess play. Excess clearance in the bush can lead to delayed brake response and uneven lining contact, so you should replace worn bushes as soon as you detect movement. Additionally, follow your workshop procedures for supporting the trailer, isolating air supplies and chocking wheels before working on any foundation brake components. After installation, apply the specified grease, re-check for free camshaft rotation and then perform a full brake function test before releasing the vehicle back to service.

Trailer Applications

Fleets use this flanged inner bush 1.5 inch camshaft component across a wide range of heavy trailers with S-cam drum brakes, including curtain-siders, tippers and skeletal trailers. It suits air brake foundation systems where the camshaft runs through the spider or hanger and relies on bushes for support. Furthermore, it works well as a planned-service replacement item during brake relines, helping operators reduce unplanned downtime and keep braking performance predictable on long-haul and regional work.

Cross-reference and Suitability

Specific cross-reference part numbers for this bush are not documented in the current data. Instead, you should match by camshaft diameter, bush housing bore and overall length when checking potential equivalent parts. If you move between brands, compare the 38mm internal diameter, 48mm outer diameter and 40mm length carefully against the existing hardware before sign-off.

Why Choose ICS Trailers

ICS Trailers focuses on heavy vehicle running gear and brake components, so you can source matching hardware for full axle and brake overhauls in one place. Our team understands how camshaft bushes interact with slack adjusters, S-cams and brake shoes, and we select parts that suit Australian trailer applications. Browse the Foundation Brakes category at ICS Trailers