Check/adjust automatic load-dependent brake (ALB)

AR42.80-W-0050B

Check/adjust automatic load-dependent brake (ALB)

10.8.12

MODEL

374, 375, 940, 942, 943, 944, 950, 952, 953, 954, 958.2/4

with leaf spring suspension

1

Test connection for left rear axle combination cylinder

2

Test connection for right rear axle combination cylinder

3

Test connection for brake power regulator

4

Brake power regulator linkage

5

Test connection for front axle diaphragm cylinder

ALB plate (example)



Check

1

Determine rear axle load

Except vehicles with wheel configuration 6x2, 8x2

AR42.80-W-0060A

Only vehicles with wheel configuration 6x2, 8x2

AR42.80-W-0060B

2

Connect test kit

AR42.80-W-0050-01B

 Test kit

*360589002100

3

Fill compressed-air reservoir with air from external source

AR42.60-W-0070A

 Fill to  9 bar.

4

Note down test values specified on ALB plate

5

Perform zero-load test

AR42.80-W-0050-02B

 Test kit

*360589002100

If the pressure specified on the ALB plate is not achieved:



Adjust pressure at linkage of brake force regulator (4).

 An extension of the brake force regulator linkage (4) induces an increase in pressure, shortening of the brake force regulator linkage (4) induces a reduction in pressure.

6

Perform half-load test

AR42.80-W-0050-03B

 Test kit

*360589002100

7

Perform full-load test

AR42.80-W-0050-04B

 Test kit

*360589002100

8

Check mechanical through control in service brake valve

AR42.80-W-0050-06A

 Test kit

*360589002100