Check/adjust automatic load-dependent brake (ALB)

AR42.80-W-0050A

Check/adjust automatic load-dependent brake (ALB)

21.5.12

MODEL

374.523/551/651, 375.3/4, 940, 942, 943, 944, 950, 952, 953, 954, 957

with air suspension

1

Pressure reducing valve (to test connection for brake force regulator connector 43)

2

Brake power regulator connection 4 test connection

3

Test connection for left rear axle combination cylinder

4

Test connection for right rear axle combination cylinder

5

Test connection for front axle diaphragm cylinder (left or right)

6

Test connection for left rear axle air spring bellows pressure

7

Connector 12 external air source (min. 9 bar)

8

Test connection for reservoir pressure (with pressure reducing valve)

9

Test connection for right rear axle air spring bellows pressure

ALB plate (example)



Check

1

Connect test kit

Connect test kit

AR42.80-W-0050-01A

 Test kit

*360589002100

2

Connect pressure reducing valve (1)

3

Fill compressed-air reservoir with air from external source

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

 If all pressure tolerances are specified on the ALB plate, they are valid for the applied and the non-applied pressures.
The ALB plate is located on the inner side of the cover on the electrical compartment or on the base of the stowage compartment.

5

Perform zero-load test

Zero-load test

AR42.80-W-0050-02A

 Test kit

*360589002100

6

Perform half-load test

Half-load test

AR42.80-W-0050-03A

 Test kit

*360589002100

7

Perform full-load test

Full-load test

AR42.80-W-0050-04A

 Test kit

*360589002100

8

Check mechanical through control in service brake valve

Check mechanical through control in service brake valve

AR42.80-W-0050-06A

 Test kit

*360589002100