Description

Overview

Manual Slack Adjuster 28 Spline 38mm is a heavy duty manual cam brake adjuster built for Rockwell axle style S-cam brake setups with a 3/4 inch adjusting nut. It helps you set and maintain correct brake stroke so you get consistent braking and more predictable lining wear. This style suits fleets and workshops that want simple inspection routines and straightforward component replacement.

Features

The multi-position arm design lets you select the most suitable leverage point for your chamber and linkage geometry. The 28 spline 38mm drive suits common heavy vehicle camshaft interfaces used on many Rockwell axle applications, while the 3-hole arm gives flexibility during installation or when replacing mixed setups.

• Manual adjustment using a 3/4 inch adjusting nut
• 28 spline 38mm drive interface
• 3-hole arm with selectable 5 inch, 6 inch, or 7 inch positions
• 1/2 inch (12.7mm) clevis pin connection

Specifications and Materials

Use these selection points to confirm fitment before ordering.

• Application: Rockwell axle style cam brakes
• Spline count: 28
• Spline size: 1 1/2 inch (38mm)
• Arm holes: 3
• Arm options: 5 inch (127mm), 6 inch (152mm), 7 inch (178mm)
• Clevis pin diameter: 1/2 inch (12.7mm)

Part number: FB4994.

For installation and adjustment guidance, refer to the Fuwa K-Hitch installation bulletin for manual slack adjusters

Compatibility and Fitment

This manual slack adjuster suits 28 spline, 38mm S-cam brake camshafts where a Rockwell axle style setup and 3/4 inch adjusting nut style are required. Confirm your linkage hardware because this unit uses a 1/2 inch (12.7mm) clevis pin size. Choose the 5 inch, 6 inch, or 7 inch arm position to suit chamber stroke and lever geometry, then set free stroke to your service procedure.

Compliance and Safety

Treat brake adjustment as a safety-critical maintenance task and follow your workshop inspection intervals. Inspect clevis pins, bush wear, and camshaft spline condition during installation so the adjuster operates smoothly. Recheck adjustment after initial bedding-in because linings can settle slightly after service work.

Trailer Applications

Manual Slack Adjuster 28 Spline 38mm suits heavy trailers and truck-trailer combinations that run S-cam foundation brakes on Rockwell axle style assemblies. It supports general heavy vehicle service replacement where a manual adjuster is specified rather than an automatic unit. This can suit workshop rebuilds, scheduled maintenance, and component replacement after linkage wear or damage.

Cross-reference and Suitability

At this time, no verified cross-reference part numbers have been confirmed for this manual slack adjuster variant, so select primarily by spline, arm style, adjusting nut style, and clevis pin size.

Why Choose ICS Trailers

ICS Trailers backs practical parts selection with clear fitment info so you can order with confidence. You get support from a team that understands heavy vehicle brake hardware and service realities. If you are replacing a worn adjuster, you can pair this Manual Slack Adjuster 28 Spline 38mm with the right foundation brake parts to complete the job. Browse Foundation Brakes at ICS Trailers in Foundation Brakes at ICS Trailers