Importance

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Abstract

An indicator unit for a vehicle air brake system is provided which includes a brake rod mounted for movement between a non-braking first position and a predetermined safe maximum braking second position. A pivotally mounted slack adjuster is connected to the brake rod and is responsive to the movement of the rod. An indicator unit is provided which has a first section removably mounted on the connection between the rod and adjuster, a second section retained in a predetermined alignment with the rod, and a third section angularly disposed relative to the second section. The unit third section is provided with angularly disposed, exposed, first and second reference marks. When the rod is in the first position, the first reference mark is aligned with a predetermined first segment of the adjuster. When the rod is in the second position, the second reference mark is aligned with the predetermined segment of the adjuster. The alignment of the second reference mark with the adjuster segment is indicative that the rod has traversed 80%, or the limit, of its safe braking stroke and thus indicates adjustment of the brake system is warranted.

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First Claim