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IR & Haldex information



From original idea to original equipment

As the very first clearance-sensing brake adjuster, the Haldex AA1 offers customers a higher level of technical efficiency, safety and reliability. It is designed to adjust exactly and gradually when it matters, maintaining a constant clearance between lining and drum, whatever the conditions or driver's braking style. The adjustment mechanism is integrated into a robust, high-quality housing that protects it from knocks, dirt and moisture and assures a long service life even in hostile driving environments.

Key benefits:

  • Constantly maintains brake lining -to-drum clearance, reducing stopping distances and increasing driver's confidence under all conditions.
  • Heat-treated housing extends life and minimizes internal wear.
  • Heat-treated, high strength, high alloy steel internal gears withstand wear.
  • Reliable O-ring seals improve protection from moisture, dirt and road salt.
  • Verifies proper installation at a glance through its built-in visual indicator, eliminating the cumbersome templates needed to check other ABAs.

What sets us apart:

  • Global market leader with over 75 Million Brake adjusters sold since the introduction in the late 60´s.
  • Better durability and reliability, which provides a longer service life.
  • Reliable ring seal prevents contamination from moisture, dirt and road salt.
  • Adjusts during brake release when forces on the adjuster are at their lowest which prolongs life.
  • Clearance-sensing design prevents excessive brake wear and failed roadside inspection, which reduces operating and downtime costs.
  • Simplifies adjustment during installation and brake lining replacement with an easily accessible adjustment hex - requiring no locking pawls to remove or disengage


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