The **John Deere 670G, 670GP, 672G, and 672GP Motor Grader Service Repair Manual (TM12138)** is the authoritative workshop guide provided by **Texas Manuals**. Focused on mechanical reliability for units starting at SN 634754.
### **Inside this workshop manual:**
* **Engine Overhaul:** Complete specifications and assembly for the diesel motors.
* **Drivetrain Service:** Full teardown and assembly for the heavy gearsets and tandems.
* **Blade & Circle Drive:** Rebuilding control valves and hydraulic motors.
* **Specs:** Access official John Deere torque settings and structural tolerances instantly from **Texas Manuals**.
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