The John Deere 250D and 300D Repair Technical Manual (TM1161) is the mechanical authority for units starting at SN 609166. Focus on reliability and precision.
### **Repair Highlights:**
* **Engine Service:** Teardown and assembly procedures for JD diesel units.
* **Transmission Overhaul:** Detailed service for the drive system and final drives.
* **Articulation joint:** Maintenance for the pivot bearings and steering linkage.
* **Specs:** OEM-certified torque values and wear tolerances.
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