Identify machine issues instantly with the John Deere 350D and 400D Operation and Test Manual (TM1198). Optimized for heavy ADTs starting at SN 608490.
### **Diagnostic Features:**
* **Schematics:** High-definition wiring and hydraulic circuit diagrams.
* **System Diagnosis:** Expert theory for fault finding on heavy-duty ADT systems.
* **Operational Tests:** Performance verification for the engine and drivetrain.
* **Fault Tracking:** Logic-driven paths for rapid troubleshooting.
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