Service your heavy loader with the **John Deere 644K Repair Manual (TM12107)** from **Texas Manuals**. Focused on SN E634315-658064 and the emission-controlled 9.0L diesel power plant.
### **Repair Highlights:**
* **iT4 Engine Overhaul:** Complete specs, timing, and assembly for modern diesel motors.
* **Transmission Service:** Detailed teardown for axles and planetary final drives.
* **Hydraulic Componentry:** Rebuilding high-pressure control valves and main pumps.
* **Specs:** OEM-certified torque values and wear tolerances included.
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