Check/adjust automatic load-dependent brake (ALB)

AR42.80-G-0050CC

Check/adjust automatic load-dependent brake (ALB)

11.10.10



Check

1

Determine rear axle load of vehicle in ready-to-drive condition



*385589052100

2

Note down test values specified on ALB plate (6)

 The ALB plate (6) is located on the inside of the driver door (except on model 437.460/465, there the ALB plate (6) is located in a different position depending on the type of construction).

3

Check control linkage (7) and operating lever (8) for ease of movement as well as free play in the joints

4

Check length of control linkage (7) and operating lever (8)

 In event of deviation, set length of control linkage (7) and operating lever (8), for details refer to ALB plate (6).
To adjust the pressure, do not adjust the control linkage (7).

5

Connect pressure gauge to test connection (5)

 The uncontrolled brake pressure must be between 8.1 and 8.4 bar.

6

Connect the pressure gauge to the test connections (1, 2, 3, 4)

7

Pressurize compressed-air system up to cutoff pressure

 Before fully depressing the brake pedal each time, the compressed-air system must be filled until the cutoff pressure is reached.

8

Fully depress brake pedal

 The pressure gauge of the controlled circuit must come to a standstill within the specified pressure range.
Permissible values are given in the ALB setting diagram on the ALB plate (6). A deviation of  0.4 bar is permissible. In the event of a greater deviation in pressure, the ALB controller has to be adjusted.

Adjust

9

Release clamp screw (9) on operating lever (8)

 Brake must be disengaged.

10

Turn shaft (10)

 Turn shaft (10) until the required adjustment value is reached on the pressure gauge. If the pressure is too low or too high, the shaft (10) has to be turned in clockwise or anticlockwise respectively.
Do not rotate shaft (10) any more than 90°.

11

Tighten clamp screw (9) and repeat brake application



*BA42.80-N-1001-01D

12

Check adjusting automatic load-dependent brake system setting again, if necessary set again

13

Detach pressure gauge

14

Check brake system for leaks and proper function

Number

Designation

Model 437.430/435

Model 437.431/436

Model
437.460/465

BA42.80-N-1001-01D

Clamp screw, ALB controller

Nm

12

12

12