1998–2000 John Deere 4500, 4600 & 4700 Compact Utility Tractors Service & Repair Manual (P/N TM1679)

• Official 664-page OEM technical manual (TM1679, 27JUN00 revision), replacing the previous 1999 edition.
• Covers 1998–2000 John Deere 4500, 4600 & 4700 Compact Utility Tractors, including CST, PRT, and Hydrostatic Drive variants.
• Delivers 56 individual system schematics, 14 major diagnostic troubleshooting charts, and comprehensive fastener torque tables.
• Provides the definitive factory-spec reference for the 4TNE-series engine and chassis systems across the 4000-series compact lineup.
• Contains essential wiring diagrams, routine maintenance schedules, and complete PDF repair procedures.
• Explains complex assemblies like the 4-WD front axle, Selective Control Valve (SCV), rockshaft lift cylinder, PTO clutch, and planetary final drives.

System Coverage and Technical Data

This documentation delivers factory-level data straight to experienced technicians, mechanics, and dedicated DIYers. The layout follows a strict systems-based organization to speed up troubleshooting in a busy shop. Bypassing expensive dealership labor rates becomes highly practical when utilizing the step-by-step instructions for heavy-duty jobs, such as front and rear tractor splitting, hydrostatic pump disassembly, or PTO clutch overhauls. Major sections provide highly structured content for the diesel engine, electrical architecture, and complex drivetrain configurations like the PowrReverser and hydrostatic systems. To further accelerate repairs, mechanics will find specific visual aids, including the Power Circuit Electrical Schematic, Hydrostatic System Schematic, Component Location views, and exploded assembly drawings for steering, braking, and hydraulics.

Working on heavy utility tractors involves high-pressure hydraulic lines and substantial weight. Always review OEM safety protocols, ensuring the machine is properly supported with approved splitting stands and depressurized before applying any of the specifications listed.

When executing a repair on these specific models, technicians must be aware of certain assembly pitfalls. For instance, when servicing the 4-WD front axle, reusing the torque-prevailing nut on the final drive hub shaft, or tightening it with an impact wrench, destroys the exact bearing preload required to prevent hub failure. Furthermore, attempting to resolve hydrostatic neutral creep by merely adjusting external pedals often fails; the internal servo motor must be properly recalibrated utilizing the specific JDG1291 adjustment tool to prevent uncontrolled tractor movement.

Precision makes or breaks a rebuild. This technical overview outlines the critical benchmarks required to bring these compact tractors back to factory standards. For instance, the connecting rod bearing clearance is strictly documented at 0.04–0.07 mm. The engine slow idle speed is calibrated to exactly 950 ± 50 rpm, and the cooling system maximum pressure is capped at 97 kPa. From valve clearances and compression ratios to fuel injection pump timing and alternator output, these exact parameters guarantee accurate component diagnostics.