John Deere 4110 / 4115 Technical Manual (TM1984, May 2002)

• Official John Deere technical manual TM1984 (published May 2002) for the 4110 and 4115 Compact Utility Tractors.
• Spans 698 pages across 12 detailed chapters, providing foundational reference data for both CST and HST drivetrain configurations.
• Covers the 21 HP and 24 HP Yanmar engine variants (3TNE74 and 3TNE78A).
• Contains 124 torque-spec tables, system-specific electrical wiring diagrams, and hydraulic schematics.

Engine and Drivetrain Systems

This factory-level documentation delivers a comprehensive breakdown of the Yanmar diesel engines powering these tractors. The chapters map out engine block assembly, piston and ring clearances, valve train settings, and fuel system calibration. You will find lubrication system data and cooling system theory of operation documented alongside detailed diagnostic flow charts. These charts are invaluable for troubleshooting common operational issues like rough idling, misfiring, or excessive exhaust smoke on the shop floor. When performing deep engine or hydraulic diagnostic work, always prioritize standard shop safety protocols and ensure system pressure is fully relieved before opening lines.

Specification Highlights

Accurate technical data is crucial for precision adjustments across all major systems. For instance, the intake valve clearance for the 4110 is listed at 0.15–0.25 mm in the diagnostic specification table, while the coolant system capacity is documented at 2.4 liters. Mechanics working on the 21 HP series will find the camshaft end play specified at 0.05–0.25 mm. Additionally, the literature lists extensive fastener torque requirements. This includes critical measurements like the cylinder head bolt specs, which call for 59–64 Nm during main assembly.