Check/adjust automatic load-dependent brake (ALB)

AR42.80-B-0050TD

Check/adjust automatic load-dependent brake (ALB)

12.02.16



Changed function of the automatic load-dependent brake (ALB)

 Only vehicles until 12 tons and three-channel ABS (without ASR).

BT42.80-B-1000-01TA



Check

1

Check the rear axle load

AR42.80-B-0060TA

2

Connect the test box

AR42.80-B-0050-01TD



*360589002100

3

Fill up the compressed air tank with an outer supply

 Fill up until  9 bar.

AR42.60-B-0070TB

4

Note the mentioned test values in ALB plate

ALB plate is behind the maintenance cover or cabin glove compartment.

*BE42.80-B-1001-01C

*BE42.80-B-1002-01C

*BE42.80-B-1003-01C

5

Carry out a test with no load

AR42.80-B-0050-02TB



*360589002100

If the mentioned pressure in ALB plate has not been reached: 

Adjust the pressure in brake pressure regulator rod (4).

 An increase of brake pressure regulator rod (4) contributes to an increase of pressure.

A decrease of brake pressure regulator rod (4) contributes to a decrease of pressure.

6

Carry out a half load test

AR42.80-B-0050-03TB



*360589002100

7

Carry out a full load test

AR42.80-B-0050-04TB



*360589002100

8

Check mechanical command in the service brake valve

AR42.80-B-0050-06A



*360589002100

Número

Denominação

Chassis 958.020/022/024/026/030/032/034/036 with rear spring A 974 320 02 06

Chassis 958.020/022/024/026/030/032/034/036 with rear spring A 958 320 02 02

BE42.80-B-1001-01C

Pressure for the regulator test (ALB)

bar

8,0

8,0

BE42.80-B-1002-01C

Output pressure (port 2) and rod travel according to the load on the rear axle

2000

bar

2,9

2,9

mm

86

67

3000

bar

4,5

5,1

mm

58

48

4000

bar

5,7

6,3

mm

35

31

5000

bar

6,8

6,9

mm

28

25

6000

bar

7,6

7,5

mm

21

18

7000

bar

8,2

8,2

mm

13

12

8000

bar

-

-

mm

-

-

8500

bar

-

-

mm

-

-

8800

bar

8,2

8,2

mm

0

0

10400

bar

-

-

mm

-

-

11000

bar

-

-

mm

-

-

BE42.80-B-1003-01C

Rod length (adjustment)

mm

260

195

Número

Denominação

Chassis 958.050/052/054/056/070/072/074/076 with rear spring A 974 320 43 06

Chassis 958.050/052/054/056/070/072/074/076 with rear spring A 958 320 03 02

BE42.80-B-1001-01C

Pressure for the regulator test (ALB)

bar

8,0

8,0

BE42.80-B-1002-01C

Output pressure (port 2) and rod travel according to the load on the rear axle

2000

bar

2,9

2,9

mm

88

78

3000

bar

4,2

4,1

mm

64

63

4000

bar

5,8

5,3

mm

40

48

5000

bar

6,7

6,5

mm

34

34

6000

bar

7,1

7,0

mm

27

27

7000

bar

7,7

7,5

mm

21

21

8000

bar

8,2

8,2

mm

15

15

8500

bar

-

-

mm

-

-

8800

bar

-

-

mm

-

-

10400

bar

8,2

8,2

mm

0

0

11000

bar

-

-

mm

-

-

BE42.80-B-1003-01C

Rod length (adjustment)

mm

260

237

Número

Denominação

Chassis 958.077 with rear spring A 958 320 00 06/A 958 320 03 06

Chassis 958.078 with rear spring A 974 320 05 08

BE42.80-B-1001-01C

Pressure for the regulator test (ALB)

bar

8,0

8,0

BE42.80-B-1002-01C

Output pressure (port 2) and rod travel according to the load on the rear axle

2000

bar

2,52

2,9

mm

57

120

3000

bar

3,79

3,7

mm

53

111

4000

bar

4,95

5,0

mm

35

99

5000

bar

5,66

6,3

mm

25

78

6000

bar

6,28

7,6

mm

17

57

7000

bar

6,76

8,2

mm

11

35

8000

bar

-

-

mm

-

-

8500

bar

8,0

-

mm

0

-

8800

bar

-

-

mm

-

-

10400

bar

-

-

mm

-

-

11000

bar

8,0

8,2

mm

0

0

BE42.80-B-1003-01C

Rod length (adjustment)

mm

260

300