HALDEX brand Adjuster, braking system lever is a unit of wheel brake mechanisms of vehicles equipped with a brake system with a pneumatic drive. It is a device for transferring the moment of force from the brake chamber to the brake shoe drive and for regulating (manual or automatic) the working gap between the friction linings of the shoes and the surface of the brake drum by changing the angle of the expanding fist.

1. NG
2. MK
3. SK
4. OH
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The operation of adjuster

Most modern heavy wheeled vehicles and various automotive and tractor equipment are equipped with a pneumatic brake system. The drive of mechanisms mounted on wheels in such a system is carried out using brake chambers, the stroke of which cannot be changed or varies within very narrow limits. This can lead to a deterioration in the performance of the brakes when the brake pads are worn out - at some point, the stroke of the rod will no longer be enough to select the increased distance between the pad and the surface of the drum, and braking simply will not occur. To solve this problem, an additional unit is introduced into the wheel brake mechanisms to change and maintain the gap between the surfaces of these parts - the brake-adjusting lever.