RBK / RBG piston
|  | Description
|  | Possible causes
|  | Troubleshooting
Description Plausibility tests have revealed that the RBK piston or the RBG piston (RBK = reverse gear brake small, RBG = reverse gear brake large) is blocked mechanically. 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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