TB piston
|  | Description
|  | Possible causes
|  | Troubleshooting
Description Plausibility tests have revealed that the TB piston (piston of the turbine brake) is mechanically blocked. Possible causes Contamination of the oil that limits or prevents piston movement. Troubleshooting Repair according to the document "DIWA.3E Repair Manual". Check piston and control block for mechanical blocking, remove foreign bodies and reinstall cleaned components. Drive vehicle to ensure the correct function.
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