W42.25-1357-08
1 | Test connection | B17 | Brake value sensor (Wabco) | B17a | Brake value sensor (Knorr) |
W42.25-1358-08
2 | Bolts | 4 | Electrical connectors | |
3 | Compressed air connectors | A20 | Front axle axle modulator (Wabco) |
Warning | Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | |
Topical note | Information on preventing damage to electronic components due to electrostatic discharge | ||
Topical note | Notes on self-locking nuts and bolts | ||
Notes on checking axle modulator before replacement | |||
| Remove/install | ||
1 | Secure vehicle to prevent it moving away. | ||
2 | Completely empty compressed-air system at test connection (1). | ||
3 | Switch off ignition. | ||
4 | Disconnect electrical connectors (4) from front-axle axle modulator (A20). | ||
5 | Mark compressed-air connectors (3) as per labeling on front-axle axle modulator (A20) and detach. | ||
Installation: Pay attention to marking. | |||
6 | Unscrew screws (2) and remove front-axle axle modulator (A20). | Bolt, axle modulator on front axle (Wabco) to bracket | |
7 | Install in the reverse order. | ||
| Check | ||
8 | Start engine and completely fill compressed-air system at idle speed. | ||
9 | Switch off ignition. | ||
10 | Operate brake pedal and fix in place using brake pedal jack. | Brake pedal jack | |
11 | Check compressed-air connectors (3) at front-axle axle modulator (A20) for leaktightness. | Leak detection spray | |
12 | Remove brake pedal jack. |
000 589 18 31 00
Brake pedal jack