CB21103 Crewson Automatic Slack Adjuster

The CB21103 Crewson Automatic Slack Adjuster delivers precise and consistent brake adjustment for heavy-duty vehicles. Built with a straight arm design, it fits a 1.50-inch camshaft and features 10 spline teeth for a secure and accurate connection. With adjustable arm spans of 5.00″ and 6.00″, this slack adjuster is ideal for various axle setups, helping reduce manual brake maintenance while improving safety and performance.

Designed for compatibility across a wide range of vehicles, the CB21103 cross-references with multiple leading OEM part numbers, making it a reliable and versatile replacement solution.

Specifications:

• Slack Adjuster Type: Automatic
• Arm Style: Straight
• Camshaft Diameter: 1.50 inches
• Spline Teeth: 10
• Arm Span (A): 5.00 inches
• Arm Span (B): 6.00 inches

Cross Reference Compatibility:

• Crewson: MK21103S, CB21103, CI21103
• Automann: 36.1030
• BWP: M-3367
• Dayton: 05-560
• Euclid: E-6991A, E-6991, E-6991B
• Haldex: CS52315
• Leland: L3003
• Spicer: 11-351, 11-351-101, 11-513, 11-516, 11-521
• MPN: CB21103

Key Features:

• Automatic brake adjustment reduces maintenance
• Straight arm design for easy installation
• 10-tooth spline and 1.50″ camshaft diameter for a precise fit
• Adjustable 5.00″–6.00″ arm span suits multiple axle configurations
• Heavy-duty performance trusted across commercial fleets
• Compatible with major OEM replacements for seamless integration

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