AR42.80-D-1600B | Checking and adjusting axle load-dependent brake (ALB) | 15.6.09 |
MODEL 901, 902, 903 with CODE (J61) Hydraulic brake test connection
MODEL 901, 902, 903, 904, 905
with CODE (J61) Hydraulic brake test connection
with CODE (BB0) Antilock brake system (ABS)
D42.80-0007-05
1 Hydraulic unit
2 Master brake cylinder test connections
3 Reservoir
4 Twin ALB controller
5 Left twin ALB controller test connection
6 Right twin ALB controller test connection
Shown on model 903
D42.80-0006-01
D42.80-0005-01
2 Master brake cylinder test connection
5 Left twin ALB controller test connection
6 Right twin ALB controller test connection
| Checking | ||
Danger! | Risk of poisoning caused by swallowing brake fluid. Risk of injury caused by brake fluid coming into contact with skin and eyes. | Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid. | |
| Brake fluid notes | All models | |
| Notes on repairs to brake system | All models | |
| It is not possible to repair twin controllers. | ||
| Notes on adjusting axle load-dependent brake | ||
1 | Check actuation of axle load-dependent brake | If necessary, replace bearing bushings | |
Long-term grease | |||
2 | Check actuating lever of twin ALB controller | ||
3 | Connect pressure gauge at master brake cylinder test connection (2) | ||
4 | Connect pressure gauge at test connection for right rear brake caliper (6) at twin ALB controller. | ||
5 | Bleed both pressure gauges | ||
6 | Checking brake pressure of ALB controller | ||
| |||
Inlet pressure | |||
7 | Disconnect pressure gauge at test connection (6) | ||
8 | Connect pressure gauge to test connection for left rear brake caliper (5) on twin ALB controller | ||
9 | Bleed pressure gauge | ||
10 | Checking brake pressure of ALB controller | ||
| |||
Inlet pressure | |||
11 | Compare outlet value for right rear brake with outlet value for left rear brake. | If variation of outlet pressure between left and right is greater than the permitted tolerance | |
Replace twin ALB controller | |||
12 | Adjust ALB controller | ||
| |||
13 | Disconnect pressure tester. | ||
14 | Bleed brake system | After testing, only bleed brake calipers to which the pressure tester was connected. | |
15 | Check fluid level in reservoir and correct if necessary | ||
| |||
16 | Check brake system for leaks |
Test and adjustment values for ALB controller
Number | Designation | Model 690.611/63/64, | Models 690.612/613, | ||
BE42.80-N-1001-01A | ALB controller pressure test | Inlet pressure | bar | 100 | 100 |
Maximum variation of outlet pressure between left and right | bar | 6 | 6 | ||
BE42.80-N-1002-01A | ALB controller linkage | Maximum deflection play of actuator rod | mm | 15 | 15 |
See picture | |||||
Test and adjustment values for ALB controller
Number | Designation | Model 690.612/613 | ||
BE42.80-N-1001-01A | ALB controller pressure test | Inlet pressure | bar | 100 |
Maximum variation of outlet pressure between left and right | bar | - | ||
BE42.80-N-1002-01A | ALB controller linkage | Maximum deflection play of actuator rod | mm | 15 |
See picture | ||||
000 589 18 31 00
385 589 05 21 00
Test balance
Brake pedal jack
Repair materials
Number | Designation | Order number |
BR00.45-Z-1001-06A | Long-life grease | A 000 989 63 51 11 |
Referenced documents
- ah4200p000301a Notes on repairs to brake system
- ah4250p000101a Brake fluid notes
- ah4280n000101a Notes on adjusting axle load-dependent brake
- ap4250d4210a Hydraulic brake system - check fluid level, correct if necessary
- ar4210d0010a Bleed brake system
- ar4280d160001a Checking brake pressure of ALB controller
- ar4280d160301a Adjust ALB controller
- ar4280d160302a Check, remove/install axle load-dependent brake (ALB) operation
- ar4280d160304a Check actuating lever of twin ALB controller
- as4250z000101a Risk of poisoning from swallowing brake fluid. Risk of injury from skin and eye contact with brake fluid