AR42.80-D-1600F | Checking and adjusting axle load-dependent brake (ALB) | 13.1.10 |
MODEL XD1, XD2, XD3, XD4, XD5, XD6, XD7, YD1, YD2, YD3, YD4, YD5, YD6, YD7
MODEL 903.61 /66, 904.61 /66 with CODE (ZU7) National version for Canada
MODEL 903.61 /66, 904.61 /66 with CODE (ZU8) National version for USA
MODEL 903.61 /66, 904.61 /62 /66 with CODE (ZU9) National version for Mexico
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 WD2YD241
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 | ||
| Notes on repairs to brake system | ||
| It is not possible to repair twin controllers. | ||
Always replace controller if not functioning correctly or if defective. | |||
| Notes on adjusting axle load-dependent brake | ||
1 | Check actuation of axle load-dependent brake | If necessary, replace plain bearings. | |
Deflection play | |||
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 | ||
BE42.80-N-1001-01A | ALB controller pressure test | Inlet pressure | bar | 100 |
Maximum variation of outlet pressure between left and right | bar | 6 | ||
BE42.80-N-1002-01A | ALB controller linkage | Maximum deflection play of actuator rod | mm | 15 |
See picture | ||||
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 | |||||
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
- ap4250d4210b Hydraulic brake system - checking and correcting fluid level
- ar4210d0010b 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