AR42.80-W-0050C | Check/adjust automatic load-dependent brake (ALB) | 8.1.08 |
MODEL 970, 972, 974, 975, 976 with CODE (B02) Brake system, antilock brake system (ABS)
with air suspension
W42.60-0037-06
1 Test connection for left rear axle combination cylinder
2 Test connection for right rear axle combination brake cylinder
3 Brake power regulator connection 4 test connection
4 Adjustable pressure reducing valve with pressure gauge to test connection for brake power regulator, connection 43
5 Test connection for front axle diaphragm cylinder (left and right)
6 Test connection for left rear axle air bellows pressure
7 Test connection for right rear axle air bellows pressure
8 Test connection for reservoir pressure (adjustable pressure reducing valve with pressure gauge at connection 43)
9 Connection for external air source (min. 9 bar)
W42.10-0011-11
ALB plate
(example)
Modification notes
| Function of automatic load-dependent brake (ALB) changed | Only on vehicles up to 12 t permissible gross vehicle weight and with 3-channel ABS (without ASR). | |
| Checking | ||
1 | Connect test kit | ||
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2 | Fill compressed-air reservoir with air from external source | Fill up to 9 bar. | |
3 | Note down test values specified on ALB plate | The ALB plate is located behind the maintenance flap or in the stowage compartment in the cab. | |
4 | Perform zero-load test | ||
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5 | Perform half-load test | ||
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6 | Perform full-load test | ||
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7 | Check mechanical through control in service brake valve | ||
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Test kit
360 589 00 21 00