Part of the John Deere Repair Manuals.
An hour from now you could have the valve cover off and this open beside the engine: CTM3, the 718-page John Deere technical manual PDF covering the Series 220 diesel engine line, seventeen designations from the 3TN66 through the 4TN100. Each engine family gets its own complete rebuild section, cylinder head and valves, pistons and rods, crankshaft and main bearings, camshaft and timing gear train, and those sections take up most of the book. Wiring schematics for the power unit electrical system close out the volume, behind turbocharger failure analysis and fuel system theory of operation. Torque the head cap screws in three passes, 11 N-m, then 22, then a final 34 N-m (25 lb-ft), and replace starter brushes worn past the 7.70 mm minimum before anything goes back together. Every day that engine sits apart on your stand, it earns nothing. Bookmarks and a real text layer put the right clearance table two clicks from the cover.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 7-12 | Recognize Safety Information |
| Specifications and General Information | 13-32 | Engine Specifications, Fuels, Lubricants and Coolant, Repair Information |
| Engine Family 3TN66 and 3TNA72 (3009) | 33-192 | 3TN66 and 3TNA72 Engine Service, Specifications, Cylinder Head, Valves and Manifolds, Pistons, Rods and Cylinder Block, Crankshaft, Main Bearings and Flywheel, Camshaft and Timing Gear Train, Lubrication System, Cooling System, Fuel System, Starter, Alternator, Diagnosis, Checks, Tests and Adjustments, Operational Tests |
| Engine Family 3TN75, 3TN78, 3TNC78 (3011), 3TN82, 3TNA82 and 3TN84 (3014) | 193-332 | 3TN75/3TN78/3TNC78 and 3TN82/3TNA82/3TN84 Engine Service, Specifications, Cylinder Head, Valves and Manifolds, Pistons, Rods and Cylinder Block, Crankshaft, Main Bearings and Flywheel, Camshaft and Timing Gear Train, Lubrication System, Cooling System, Fuel System, Starter, Alternator, Diagnosis, Checks, Tests and Adjustments, Operational Tests |
| Engine Family 4TN78T, 4TN82 and 4TN84(T) (4019) | 333-477 | 4TN78T, 4TN82 and 4TN84(T) Engine Service, Specifications, Cylinder Head, Valves and Manifolds, Pistons, Rods and Cylinder Block, Crankshaft, Main Bearings and Flywheel, Camshaft and Timing Gear Train, Lubrication System, Cooling System, Fuel System, Starter, Alternator, Diagnosis, Checks, Tests and Adjustments, Operational Tests |
| Engine Family 4TN100 | 478-580 | 4TN100 Engine Service, Specifications, Cylinder Head, Valves and Manifolds, Pistons, Rods and Cylinder Block, Crankshaft, Main Bearings and Flywheel, Camshaft and Timing Gear Train, Lubrication System, Cooling System, Fuel System, Starter (Nippondenso 1.4 kW), Alternator (Hitachi 25A), Diagnosis, Checks, Tests and Adjustments, Operational Tests |
| Accessories - Series 220 Power Unit Engines | 581-646 | Engine Accessories Specifications, Turbocharger Failure Analysis |
| Engine, Air Intake and Fuel System | 647-689 | Component Location, Theory of Operation |
| Electrical System - Series 220 Power Unit Engines | 690-718 | Introduction, Schematics |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder Head Cap Screw Torque, First (3TN66, 3TNA72) | 11 N•m (97 lb-in.) | p. 35 |
| Cylinder Head Cap Screw Torque, Second (3TN66, 3TNA72) | 22 N•m (195 lb-in.) | p. 35 |
| Cylinder Head Cap Screw Torque, Final (3TN66, 3TNA72) | 34 N•m (25 lb-ft) | p. 35 |
| Starter, Hitachi 0.8 kW, Cover Bushing I.D. Reamed (3TN66, 3TNA72) | 12.50 - 12.53 mm (0.492 - 0.493 in.) | p. 40 |
| Starter, Hitachi 0.8 kW, Minimum Brush Length (3TN66, 3TNA72) | 7.70 mm (0.303 in.) | p. 40 |
| Fuel Injection Pump Mounting Nut Torque (3TN66, 3TNA72) | 20 N•m (180 lb-in.) | p. 39 |
| Fuel Injection Pump Camshaft Bearing Retaining Screw Torque (3TN66, 3TNA72) | 20 N•m (180 lb-in.) | p. 39 |
| Crankcase Oil Capacity (3TN66, 3TNA72) | 2.5 L (2.6 qt) | p. 106 |
| Cylinder Head Cap Screw Torque, Final (3TN75, 3TN78, 3TNC78) | 69 N·m (51 lb-ft) | p. 216 |
| Cylinder Head Cap Screw Torque, Final (3TN82, 3TNA82, 3TN84) | 78 N·m (58 lb-ft) | p. 216 |
| Rocker Arm Cover Special Nut Torque (4TN78T, 4TN82, 4TN84(T)) | 18 N•m (160 lb-in.) | p. 335 |
| Rocker Arm Assembly Mounting Cap Screw Torque (4TN78T, 4TN82, 4TN84(T)) | 26 N•m (226 lb-in.) | p. 335 |
| Cylinder Head Cap Screw Torque, Final (4TN78T, 4TN82, 4TN84(T)) | 78 N•m (58 lb-ft) | p. 342 |
