Checking and adjusting axle load-dependent brake (ALB)

AR42.80-P-1600GH

Checking and adjusting axle load-dependent brake (ALB)

19.5.08



Checking

 Danger!

Risk of poisoning caused by swallowing brake fluid. Risk of injury caused by brake fluid coming into contact with skin and eyes.

Pour brake fluid only into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid.

AS42.50-Z-0001-01A



Brake fluid notes

All models

AH42.50-P-0001-01A



Notes on repairs to brake system

All models

AH42.00-P-0003-01A

1

Determine the rear axle load and load the vehicle with weights if necessary



*385589052100

2

Connect pressure tester to test connection for unregulated pressure (1).

 On vehicle without test connection, uncontrolled pressure (1) the pressure tester with connection fitting is to be connected to the brake caliper or wheel brake cylinder of the front axle.

Pressure tester (hydraulic single / dual circuit brake systems)

3

Connect pressure tester to test connection for regulated rear-axle pressure (2).

 On vehicle without test connection, rear axle controlled pressure (2) the pressure tester with connection fitting is to be connected to the brake caliper or wheel brake cylinder of the rear axle.

Pressure tester (hydraulic single / dual circuit brake systems)

4

Use the brake pedal jack to apply pressure to the brake pedal, continuing until the pressure gauge indicates an entry pressure of 100 bar in the front-axle brake circuit.



*000589183100

5

Check the output pressure at the test connection, rear axle controlled pressure (2) or the brake caliper or wheel brake cylinder of the rear axle

 If the output pressure deviates from the adjustment pressure, it should be adjusted.

*BE42.80-P-1001-01B

*BE42.80-P-1002-01B

Adjust

6

Adjusting exit pressure

Only carry out if the output pressure deviates from the adjustment pressure.

 Adjust the pressure by extending or shortening the threaded rod (4).
Extending the threaded rod (4) increases the pressure
Shortening the threaded rod (4) reduces the pressure.

 If the range of adjustment at the threaded rod (4) is not adequate, it can be increased or decreased by adjusting the control spring bearing (3) in the elongated hole.

*BE42.80-P-1001-01B

*BE42.80-P-1002-01B

7

Check the output pressure at the test connection for controlled rear axle pressure (2) or the brake caliper or wheel brake cylinder of the rear axle again

Only carry out if the output pressure has been adjusted.

*BE42.80-P-1001-01B

*BE42.80-P-1002-01B

8

Detach pressure tester

9

Bleed brake system

Only on vehicles without test connection, uncontrolled pressure (1) or test connection, rear axle uncontrolled pressure (2).

AR42.10-P-0010GG

 After checking, only bleed the brake caliper or wheel brake cylinder to which the pressure tester was connected.



*BA42.10-P-1001-02B



*BA42.10-P-1001-08A

Number

Designation

Model 461 to 99
with drum brake
Rear axle spring: yellow
Automatic load-dependent brake pressure control spring: yellow/blue

Model 461 to 99
with disk brake
Rear axle spring: yellow
Axle load-dependent brake spring: yellow/blue

BE42.80-P-1001-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 900 kg to
1500 kg)

900 kg

Specified pressure

bar

43 (2)

56 (2)

1000 kg

Specified pressure

bar

50 (2)

63 (2)

1100 kg

Specified pressure

bar

55 (2)

69 (2)

1200 kg

Specified pressure

bar

60 (2)

74 (2)

1300 kg

Specified pressure

bar

64 (2)

78 (2)

1400 kg

Specified pressure

bar

-

82 (2)

1500 kg

Specified pressure

bar

-

85 (2)

BE42.80-P-1002-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 1600 kg to
2400 kg)

1600 kg

Specified pressure

bar

-

88 (2)

1700 kg

Specified pressure

bar

-

-

1800 kg

Specified pressure

bar

-

-

1900 kg

Specified pressure

bar

-

-

2000 kg

Specified pressure

bar

-

-

2100 kg

Specified pressure

bar

-

-

2200 kg

Specified pressure

bar

-

-

2300 kg

Specified pressure

bar

-

-

2400 kg

Specified pressure

bar

-

-

Number

Designation

Model 461 to 99
with drum brake
with 2400 wheelbase
Rear axle spring: white
Automatic load-dependent brake pressure control spring: yellow

Model 461 to 99
with disk brake
with 2400 wheelbase
Rear axle spring: white
Automatic load-dependent brake pressure control spring: yellow

BE42.80-P-1001-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 900 kg to
1500 kg)

900 kg

Specified pressure

bar

43 (2)

54 (2)

1000 kg

Specified pressure

bar

47 (2)

63 (2)

1100 kg

Specified pressure

bar

52 (2)

71 (2)

1200 kg

Specified pressure

bar

57 (2)

79 (2)

1300 kg

Specified pressure

bar

62 (2)

85 (2)

1400 kg

Specified pressure

bar

-

90 (2)

1500 kg

Specified pressure

bar

-

95 (2)

BE42.80-P-1002-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 1600 kg to
2400 kg)

1600 kg

Specified pressure

bar

-

100 (2)

1700 kg

Specified pressure

bar

-

-

1800 kg

Specified pressure

bar

-

-

1900 kg

Specified pressure

bar

-

-

2000 kg

Specified pressure

bar

-

-

2100 kg

Specified pressure

bar

-

-

2200 kg

Specified pressure

bar

-

-

2300 kg

Specified pressure

bar

-

-

2400 kg

Specified pressure

bar

-

-

Number

Designation

Model 461 to 99
with drum brake
with 2850 wheelbase
Rear axle spring: white
Axle load-dependent brake spring: yellow

Model 461 to 99
with disk brake
with 2850 wheelbase
Rear axle spring: white
Axle load-dependent brake spring: yellow

BE42.80-P-1001-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 900 kg to
1500 kg)

900 kg

Specified pressure

bar

43 (2)

-

1000 kg

Specified pressure

bar

47 (2)

60 (2)

1100 kg

Specified pressure

bar

52 (2)

68 (2)

1200 kg

Specified pressure

bar

57 (2)

76 (2)

1300 kg

Specified pressure

bar

62 (2)

82 (2)

1400 kg

Specified pressure

bar

-

88 (2)

1500 kg

Specified pressure

bar

-

93 (2)

BE42.80-P-1002-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 1600 kg to
2400 kg)

1600 kg

Specified pressure

bar

-

97 (2)

1700 kg

Specified pressure

bar

-

100 (2)

1800 kg

Specified pressure

bar

-

100 (2)

1900 kg

Specified pressure

bar

-

-

2000 kg

Specified pressure

bar

-

-

2100 kg

Specified pressure

bar

-

-

2200 kg

Specified pressure

bar

-

-

2300 kg

Specified pressure

bar

-

-

2400 kg

Specified pressure

bar

-

-

Number

Designation

Model 461 to 99
with drum brake without KSK load uprating
Rear axle spring: brown
Automatic load-dependent brake pressure control spring: yellow/blue

Model 461 to 99
with disk brake
Rear axle spring: yellow
Automatic load-dependent brake pressure control spring: yellow/blue

BE42.80-P-1001-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 900 kg to
1500 kg)

900 kg

Specified pressure

bar

44 (2)

58 (2)

1000 kg

Specified pressure

bar

50 (2)

64 (2)

1100 kg

Specified pressure

bar

55 (2)

69 (2)

1200 kg

Specified pressure

bar

59 (2)

72 (2)

1300 kg

Specified pressure

bar

62 (2)

76 (2)

1400 kg

Specified pressure

bar

-

79 (2)

1500 kg

Specified pressure

bar

-

82 (2)

BE42.80-P-1002-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 1600 kg to
2400 kg)

1600 kg

Specified pressure

bar

-

85 (2)

1700 kg

Specified pressure

bar

-

89 (2)

1800 kg

Specified pressure

bar

-

92 (2)

1900 kg

Specified pressure

bar

-

-

2000 kg

Specified pressure

bar

-

-

2100 kg

Specified pressure

bar

-

-

2200 kg

Specified pressure

bar

-

-

2300 kg

Specified pressure

bar

-

-

2400 kg

Specified pressure

bar

-

-

Number

Designation

Model 461 to 99
with drum brake
with load capacity increase KSK
Rear axle spring: brown
Axle load-dependent brake spring: yellow/blue

Model 461 to 99
with drum brake
Rear axle spring: yellow/orange
Automatic load-dependent brake pressure control spring: yellow/blue

BE42.80-P-1001-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 900 kg to
1500 kg)

900 kg

Specified pressure

bar

41 (2)

43 (2)

1000 kg

Specified pressure

bar

47 (2)

50 (2)

1100 kg

Specified pressure

bar

52 (2)

55 (2)

1200 kg

Specified pressure

bar

58 (2)

60 (2)

1300 kg

Specified pressure

bar

63 (2)

64 (2)

1400 kg

Specified pressure

bar

-

-

1500 kg

Specified pressure

bar

-

-

BE42.80-P-1002-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 1600 kg to
2400 kg)

1600 kg

Specified pressure

bar

-

-

1700 kg

Specified pressure

bar

-

-

1800 kg

Specified pressure

bar

-

-

1900 kg

Specified pressure

bar

-

-

2000 kg

Specified pressure

bar

-

-

2100 kg

Specified pressure

bar

-

-

2200 kg

Specified pressure

bar

-

-

2300 kg

Specified pressure

bar

-

-

2400 kg

Specified pressure

bar

-

-

Number

Designation

Model 461 to 99
with disk brake
Rear axle spring: yellow/orange
Automatic load-dependent brake pressure control spring: yellow/blue

Model 461 to 99
with drum brake
Rear axle spring: lilac
Automatic load-dependent brake pressure control spring: white

BE42.80-P-1001-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 900 kg to
1500 kg)

900 kg

Specified pressure

bar

56 (2)

50 (2)

1000 kg

Specified pressure

bar

63 (2)

55 (2)

1100 kg

Specified pressure

bar

68 (2)

61 (2)

1200 kg

Specified pressure

bar

73 (2)

67 (2)

1300 kg

Specified pressure

bar

77 (2)

73 (2)

1400 kg

Specified pressure

bar

-

-

1500 kg

Specified pressure

bar

-

-

BE42.80-P-1002-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 1600 kg to
2400 kg)

1600 kg

Specified pressure

bar

-

-

1700 kg

Specified pressure

bar

-

-

1800 kg

Specified pressure

bar

-

-

1900 kg

Specified pressure

bar

-

-

2000 kg

Specified pressure

bar

-

-

2100 kg

Specified pressure

bar

-

-

2200 kg

Specified pressure

bar

-

-

2300 kg

Specified pressure

bar

-

-

2400 kg

Specified pressure

bar

-

-

Number

Designation

Model 461 to 99
with disk brake
Rear axle spring: lilac
Automatic load-dependent brake pressure control spring: white

Model 461 to 99
without ABS
Rear axle spring: red
Axle load-dependent brake spring: green

BE42.80-P-1001-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 900 kg to
1500 kg)

900 kg

Specified pressure

bar

-

-

1000 kg

Specified pressure

bar

-

-

1100 kg

Specified pressure

bar

-

42 (2)

1200 kg

Specified pressure

bar

78 (2)

45 (2)

1300 kg

Specified pressure

bar

85 (2)

49 (2)

1400 kg

Specified pressure

bar

92 (2)

52 (2)

1500 kg

Specified pressure

bar

97 (2)

55 (2)

BE42.80-P-1002-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 1600 kg to
2400 kg)

1600 kg

Specified pressure

bar

100 (2)

58 (2)

1700 kg

Specified pressure

bar

100 (2)

61 (2)

1800 kg

Specified pressure

bar

100 (2)

64 (2)

1900 kg

Specified pressure

bar

-

67 (2)

2000 kg

Specified pressure

bar

-

68 (2)

2100 kg

Specified pressure

bar

-

85 (2)

2200 kg

Specified pressure

bar

-

100 (2)

2300 kg

Specified pressure

bar

-

-

2400 kg

Specified pressure

bar

-

-

Number

Designation

Model 461 to 99
with ABS
Rear axle spring: red
Automatic load-dependent brake pressure control spring: green

Model 461 to 99
without ABS
with 2850 wheelbase
Rear axle spring: azure blue
Automatic load-dependent brake pressure control spring: green

BE42.80-P-1001-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 900 kg to
1500 kg)

900 kg

Specified pressure

bar

-

-

1000 kg

Specified pressure

bar

52 (2)

-

1100 kg

Specified pressure

bar

55 (2)

-

1200 kg

Specified pressure

bar

57 (2)

-

1300 kg

Specified pressure

bar

60 (2)

33 (2)

1400 kg

Specified pressure

bar

62 (2)

36 (2)

1500 kg

Specified pressure

bar

65 (2)

-

BE42.80-P-1002-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 1600 kg to
2400 kg)

1600 kg

Specified pressure

bar

67 (2)

-

1700 kg

Specified pressure

bar

70 (2)

-

1800 kg

Specified pressure

bar

72 (2)

-

1900 kg

Specified pressure

bar

74 (2)

51 (2)

2000 kg

Specified pressure

bar

76 (2)

52 (2)

2100 kg

Specified pressure

bar

89 (2)

-

2200 kg

Specified pressure

bar

100 (2)

-

2300 kg

Specified pressure

bar

-

-

2400 kg

Specified pressure

bar

-

-

Number

Designation

Model 461 to 99
with ABS
with 2850 wheelbase
Rear axle spring: azure blue
Automatic load-dependent brake pressure control spring: green

Model 461 to 99
without ABS
with 3120 wheelbase
Rear axle spring: azure blue
Axle load-dependent brake spring: green

BE42.80-P-1001-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 900 kg to
1500 kg)

900 kg

Specified pressure

bar

-

33 (2)

1000 kg

Specified pressure

bar

-

35 (2)

1100 kg

Specified pressure

bar

47 (2)

39 (2)

1200 kg

Specified pressure

bar

50 (2)

44 (2)

1300 kg

Specified pressure

bar

53 (2)

48 (2)

1400 kg

Specified pressure

bar

56 (2)

-

1500 kg

Specified pressure

bar

58 (2)

-

BE42.80-P-1002-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 1600 kg to
2400 kg)

1600 kg

Specified pressure

bar

-

-

1700 kg

Specified pressure

bar

-

-

1800 kg

Specified pressure

bar

65 (2)

-

1900 kg

Specified pressure

bar

67 (2)

-

2000 kg

Specified pressure

bar

68 (2)

-

2100 kg

Specified pressure

bar

-

-

2200 kg

Specified pressure

bar

-

-

2300 kg

Specified pressure

bar

-

-

2400 kg

Specified pressure

bar

-

-

Number

Designation

Model 461 to 99
with ABS
with 3120 wheelbase
Rear axle spring: azure blue
Axle load-dependent brake spring: green

Model 461 to 99
without ABS
Rear axle spring: squirrel grey
Automatic load-dependent brake pressure control spring: green

BE42.80-P-1001-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 900 kg to
1500 kg)

900 kg

Specified pressure

bar

-

33 (2)

1000 kg

Specified pressure

bar

51 (2)

35 (2)

1100 kg

Specified pressure

bar

54 (2)

39 (2)

1200 kg

Specified pressure

bar

57 (2)

43 (2)

1300 kg

Specified pressure

bar

59 (2)

47 (2)

1400 kg

Specified pressure

bar

62 (2)

-

1500 kg

Specified pressure

bar

64 (2)

-

BE42.80-P-1002-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 1600 kg to
2400 kg)

1600 kg

Specified pressure

bar

-

-

1700 kg

Specified pressure

bar

-

-

1800 kg

Specified pressure

bar

-

-

1900 kg

Specified pressure

bar

-

-

2000 kg

Specified pressure

bar

-

-

2100 kg

Specified pressure

bar

-

-

2200 kg

Specified pressure

bar

-

-

2300 kg

Specified pressure

bar

-

-

2400 kg

Specified pressure

bar

-

-

Number

Designation

Model 461 to 99
without ABS
Rear axle spring: yellow/orange
Automatic load-dependent brake pressure control spring: green

Model 461 to 99
with ABS
Rear axle spring: yellow/orange
Automatic load-dependent brake pressure control spring: green

BE42.80-P-1001-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 900 kg to
1500 kg)

900 kg

Specified pressure

bar

33 (2)

-

1000 kg

Specified pressure

bar

38 (2)

51 (2)

1100 kg

Specified pressure

bar

43 (2)

54 (2)

1200 kg

Specified pressure

bar

46 (2)

57 (2)

1300 kg

Specified pressure

bar

49 (2)

59 (2)

1400 kg

Specified pressure

bar

-

61 (2)

1500 kg

Specified pressure

bar

-

63 (2)

BE42.80-P-1002-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 1600 kg to
2400 kg)

1600 kg

Specified pressure

bar

-

65 (2)

1700 kg

Specified pressure

bar

-

67 (2)

1800 kg

Specified pressure

bar

-

69 (2)

1900 kg

Specified pressure

bar

-

71 (2)

2000 kg

Specified pressure

bar

-

73 (2)

2100 kg

Specified pressure

bar

-

75 (2)

2200 kg

Specified pressure

bar

-

76 (2)

2300 kg

Specified pressure

bar

-

-

2400 kg

Specified pressure

bar

-

-

Number

Designation

Model 461 to 99
with ABS with 2850 wheelbase
Rear axle spring: squirrel grey
Automatic load-dependent brake pressure control spring: green

Model 461 to 99
with ABS
Rear axle spring: squirrel grey
Automatic load-dependent brake pressure control spring: green

BE42.80-P-1001-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 900 kg to
1500 kg)

900 kg

Specified pressure

bar

-

46 (2)

1000 kg

Specified pressure

bar

-

48 (2)

1100 kg

Specified pressure

bar

-

50 (2)

1200 kg

Specified pressure

bar

-

53 (2)

1300 kg

Specified pressure

bar

-

55 (2)

1400 kg

Specified pressure

bar

-

-

1500 kg

Specified pressure

bar

-

-

BE42.80-P-1002-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 1600 kg to
2400 kg)

1600 kg

Specified pressure

bar

-

-

1700 kg

Specified pressure

bar

-

-

1800 kg

Specified pressure

bar

-

65 (2)

1900 kg

Specified pressure

bar

58 (2)

-

2000 kg

Specified pressure

bar

60 (2)

-

2100 kg

Specified pressure

bar

62 (2)

-

2200 kg

Specified pressure

bar

64 (2)

-

2300 kg

Specified pressure

bar

65 (2)

-

2400 kg

Specified pressure

bar

-

-

Number

Designation

Model 461 to 99
Rear axle spring: white
Automatic load-dependent brake pressure control spring: green

BE42.80-P-1001-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 900 kg to
1500 kg)

900 kg

Specified pressure

bar

-

1000 kg

Specified pressure

bar

38 (2)

1100 kg

Specified pressure

bar

43 (2)

1200 kg

Specified pressure

bar

48 (2)

1300 kg

Specified pressure

bar

52 (2)

1400 kg

Specified pressure

bar

55 (2)

1500 kg

Specified pressure

bar

-

BE42.80-P-1002-01B

Output pressure of ALB controller
(input pressure
ALB controller 100 bar)
with rear axle load
(from 1600 kg to
2400 kg)

1600 kg

Specified pressure

bar

-

1700 kg

Specified pressure

bar

-

1800 kg

Specified pressure

bar

-

1900 kg

Specified pressure

bar

68 (2)

2000 kg

Specified pressure

bar

69 (2)

2100 kg

Specified pressure

bar

-

2200 kg

Specified pressure

bar

-

2300 kg

Specified pressure

bar

-

2400 kg

Specified pressure

bar

-

Number

Designation

Model 461, 463

BA42.10-P-1001-02B

Bleed screw at front axle fixed brake caliper

Nm

14

Number

Designation

Models 460, 461

BA42.10-P-1001-08A

Bleed screw to rear axle wheel brake cylinder

Nm

14