Page 783 - Workshop Manual - Aumark (BJ1051)

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Rear axle- rear wheel brake

Front brake chamber

Adjustment

1. Determine the initial length of the push rod during the installation of the brake chamber,
the horizontal angel between the adjusting arm and the chamber push rod can not exceed
100 °-105 °, otherwise, the initial force of the brake chamber will decline.
2. Fill 0.6 mpa compressed air into the diaphragm of the brake chamber and measure the
push rod route with a height gauge.
3. The adjustment for the stroke of brake chamber can not exceed the values in the table
below, otherwise, effective brake can not be guaranteed.

Vehicle tape Effective stroke of brake chamber Maximum adjustment stroke of brake chamber
1051 series 44.5 mm 35 mm
1061 series 57.1 mm 45 mm
1089 series 63.5 mm 51 mm

4. By the end of the adjustment route, try to make the push rod axis vertical to the
centerline of the adjusting arm so as to maximize the output torque.the swing angle of the
push rod shall change within ± 3 °during the back-and forth movementof the push rod to
reduce the wear of chamber parts.
5. Try to adjust the arm route to the minimum value while no brake dragging is applied on
the wheels in order to reduce the comsumption of the compressed air and ensure the
brake safety.
6. Fill 0.6mpa of compressed air into the spring chamber after the installation; screw the
release bolt into the body of cylinder with a wrench until the release nut contacts the nut
of cylinder body.
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