Maintain optimal brake clearance and reliable stopping power with the Automann 135.S2843. This premium Haldex-style Self-Setting (SABA) automatic slack adjuster is purpose-built for trailer axles equipped with 12-1/4" brakes.
The self-setting design is engineered to automatically maintain the correct brake shoe-to-drum clearance, ensuring consistent brake stroke and eliminating the need for frequent manual adjustments. This kit comes fully equipped with the 135.H0563 Mounting Bracket Kit for a complete, hassle-free installation.
Brand: Automann
Part Number: 135.S2843
Slack Type: Automatic - Haldex Type (Self-Setting)
Application: Universal Trailer Axles (12-1/4" Brakes)
Spline Diameter: 1-1/2"
Spline Count: 28
Arm Length: 6" (L1-L2)
Included Hardware: 135.H0563 Bracket Kit
Self-Setting (SABA) Technology: Simplifies installation by automatically establishing the correct clearance upon the first few brake applications.
Trailer Optimized: Specifically designed for the unique torque requirements of trailer axles with 12-1/4" brake systems.
Durability: Built to withstand heavy-duty hauling and harsh road conditions, reducing maintenance intervals.
Safety Compliance: Helps ensure your trailer remains within DOT stroke limits, reducing the risk of roadside citations.
This unit is a direct high-quality replacement for the following reference and manufacturer part numbers:
| Manufacturer | Part Number |
| Haldex | 40920014, 40020220, 40020305, 40126305 |
| IHC (International) | ZZ40020305 |
| Mack | 539640020305 |
| Volvo | MID40020305 |
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