TM14072X19 John Deere 670G, 670GP, 672G, 672GP Motor Graders Pdf Repair Service Technical Manual

John Deere 670G, 670GP, 672G, 672GP (SN. F678818—680877) Motor Grader Repair Service Technical Manual (TM14072X19)

The John Deere 670G and 672G Motor Graders are the versatile mid-frame warriors of the G-Series, but for the specific production run of Serial Numbers F678818 through 680877, mechanical precision is what keeps them earning. When high hours lead to worn bearings or leaking seals, general knowledge isn't enough. The John Deere 670G-672GP Service Repair Technical Manual (TM14072X19) is the dedicated "hard parts" guide for this machine generation. It is strictly focused on mechanical disassembly, component inspection, and physical rebuilding, providing the workshop data needed to turn a tired machine into a factory-fresh performer.

Unlike the diagnostic manual which chases electrical ghosts, this book deals with steel and iron. It is the authority on transmission overhauls, engine removal, and differential service. Whether you are re-shimming a circle drive on a 670GP or rebuilding the front wheel hubs on a 672G, TM14072X19 provides the torque specifications, clearance tolerances, and safety sequences to ensure the job is done right the first time, preventing costly comebacks.

TM14072X19 Repair Manual Specifications

• Models Covered: John Deere 670G, 670GP, 672G, 672GP
• Serial Number Range: F678818—680877
• Document Number: TM14072X19
• Document Class: Service Repair Technical Manual (Mechanical)
• Core Content: Teardown, Inspection, and Re-assembly
• Critical Data: Torque Specs, Wear Limits, and Seal Depths
• Drivetrain Coverage: 6WD Front Axle (672G) & Tandem Rear
• Format: Searchable, Printable PDF
• Language: English

Mechanical Service & Component Restoration

6WD Front Axle & Hub Mechanics (672G/GP)

The 672G's Six-Wheel Drive system is a complex assembly of hydrostatics and gears. TM14072X19 covers the heavy mechanical work required to keep it pulling. It details the complete disassembly of the front axle hubs, including the replacement of the duo-cone seals and the inspection of the planetary gears. Crucially, it provides the procedure for setting the wheel bearing preload, a vital adjustment that ensures the hub can handle side-loads without failure.

Transmission & Differential Overhaul

Internal powertrain repairs require surgical precision. This manual guides you through the removal and bench repair of the PowerShift transmission. It offers step-by-step instructions for disassembling the clutch packs, measuring spring heights, and inspecting friction plates for heat stress. Additionally, it covers the differential lock service, providing the exact shim pack measurements needed to ensure the lock engages fully and releases cleanly during operation.

Hydraulic Cylinder & Pump Hardware

Leaking hydraulics are a productivity killer. This manual provides exploded-view diagrams for resealing every hydraulic cylinder on the 670G/672G, from the blade side-shift to the articulation rams. It specifies the correct tool usage for removing stubborn gland nuts and installing piston seals without damage. It also covers the mechanical removal and shaft seal replacement of the main hydraulic pumps, allowing for cost-effective refurbishment of expensive components.

Who Needs This Service Manual?

• Heavy Duty Mechanics: Performing engine swaps, transmission rebuilds, and major repairs.
• Fleet Managers: Managing the lifecycle of machines in the F678818—680877 range.
• Component Shops: Specializing in the rebuilding of axles, transmissions, and cylinders.
• Technical Schools: Teaching the proper disassembly procedures for heavy construction equipment.

Why Source from Manualsmarket.com?

At Manualsmarket.com, we know that for specific serial number ranges, accuracy is everything. We provide the authentic John Deere 670G/672G Repair Manual (TM14072X19) to ensure you have the exact technical data for your specific machine generation. Generic manuals can lead to stripped bolts and incorrect clearances; our manuals deliver the factory-verified confidence you need to tackle the heaviest jobs in the shop.

Visit the John Deere Equipments Collection to complete your technical library with both Repair and Diagnostic manuals.

John Deere 670G-672G Repair FAQ

Does this manual cover electrical troubleshooting?

No. Wiring diagrams, fault codes, and electrical diagnostics are exclusively found in the separate Operation and Test (Diagnostic) Manual. This book covers mechanical repair.

Is the engine repair included?

This manual covers the engine removal and installation from the frame. For the internal rebuilding of the engine block (crankshaft, pistons), you will need the separate Component Technical Manual (CTM).

Does it cover the 6WD system?

Yes. It covers the mechanical disassembly and repair of the 6WD front axle hubs and motor mounting for the 672G and 672GP models.

Are torque specs included for frame bolts?

Yes. A complete torque specification chart for all major fasteners, including circle drive bolts and wheel lugs, is included.