Part of the John Deere Repair Manuals.
All 951 pages of this John Deere 425, 445, 455 Technical Manual PDF (OEM TM1517) focus on one job: putting your lawn and garden tractor back to factory spec. You get full wiring harness diagrams and electrical schematics for each model, hydrostatic power train and hydraulic schematics, and troubleshooting charts that walk you through power, cranking, ignition, and PTO circuit diagnosis. Exploded views back up the rebuild procedures on both the gasoline FD620D and the diesel, from cylinder head to charge pump. Gap the plugs at 0.25 mm, torque them to 20 N-m, and confirm bypass valve opening pressure at 96 kPa (14 psi) before you button it up. No more chasing electrical gremlins with a multimeter and a prayer. Bookmarked with a real text layer: jump to any circuit, search any spec, fix the tractor.
Complete the set for your 425, 445, 455
- Operator Manual: John Deere 425, 445 Operator Manual
Other edition of this manual
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 2 | Table of Contents, General Diagnostic Information, Specifications, Electrical Wiring Harness Legend, Component Location, System Schematic |
| Safety | 3-7 | |
| Specifications and Information | 8-31 | General Vehicle Specifications, Metric Fastener Torque Values, Gasoline Engine, Diesel Engine, Hydrostatic Transmission Oil, Gear Case Oil |
| Engine?Fd620D, K Series | 32-109 | Engine Removal, Carburetor, Governor, Cylinder Head, Crankshaft, Oil Pump |
| Diesel Engine | 110-217 | Cooling System, Fuel Injection, Oil Pan, Timing Gear, Alternators, Cylinder Head |
| Electrical Specifications and General Information | 218-231 | Specifications, Theory, Diagnostic Information, Wire Color Abbreviation Chart |
| Component Location and Wiring Harnesses - 425 | 232-266 | Component Location (S.N., 070000 and 070001, ), Electrical Component Legends, Main Wiring Harness W1 Early and Late Models, Rear PTO Wiring Harness W2, Main Electrical Schematics |
| Troubleshooting and Circuit Diagnosis - 425 | 267-321 | Electrical System Quick Test per Serial Range, Electrical System Troubleshooting Chart, Control/Fuse Module, Power Circuit Operation and Schematics, Power Circuit Diagnosis and Test Points |
| Indicator Lights, Gauges, and PTO Circuit Diagnosis - 425 | 322-374 | Indicator Lights, Hourmeter, Coolant Temperature Gauge, Fuel Gauge, PTO Circuit Diagnosis |
| Component Location and Wiring Harnesses - 445 | 375-425 | Component Location (S.N., 070000 and 070001, ), Electrical Component Legends, Main Wiring Harness W1 (S.N., 031361, 031362, 070000, 070001, Rear PTO Harness W2, Main Electrical Schematics |
| Troubleshooting and Circuit Diagnosis - 445 | 426-524 | Electrical System Quick Test, Electrical System Troubleshooting Chart, Control/Fuse Module, Power Circuit Operation and Schematics, Fuel Pump Circuit Diagnosis, Power Circuit Test Points |
| Fuel Injection and Diagnostic Light Circuit Diagnosis - 445 | 525-562 | Fuel Injection Sensor, Diagnostic Light Circuit, Fuel Injector and Pump Circuit Diagnosis |
| Component Location, Wiring Harnesses, and Troubleshooting - 455 | 563-763 | Component Location, Wiring Harnesses, Electrical Schematics, Troubleshooting Charts, Diesel Module Test |
| Hydrostatic Power Train | 764-841 | Directional Control Valves, Charge Pump, Differential, PTO Clutch, Hydrostatic Transmission, Rear Axle Assembly |
| Steering | 842-879 | Steering Column, Steering Valve, Steering Cylinder, Front Axle, Rear Steering Linkage, Pivot Assembly |
| Brakes | 880-893 | Brake System Operation, Brake/Differential Linkage, Brake Assembly, Brake Switch, Transaxle Brake Cover |
| Hydraulics | 894-923 | Hydraulic System, Hydraulic Control Valve, Lift Cylinder, Hydraulic Schematic, Charge Pump |
| Miscellaneous | 924-937 | Air Cleaner, Muffler, Fan Belt, Radiator, Fuel Tank, Lift Linkage |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 425 | ||
| Spark Plug | 20 N•m (177 lb-in.) | p. 10 |
| All Models | ||
| Minimum Pressure (Carburetor—425) | 10 kPa (1.5 psi) | p. 34 |
| Bypass valve opening pressure | 96 kPa (14 psi) | p. 134 |
| Oil pressure regulating valve setting | 294—440 kPa (43—64 psi) | p. 134 |
| Air intake system pressurization | 34—69 kPa (5—10 psi) | p. 146 |
| Normal air filter restriction | 380 mm (15 in.) vacuum | p. 146 |
| Engine Mounting Cap Screws Torque | 80 N•m (60 lb-ft) | p. 10 |
| Spark Plug Torque (Gasoline Engine) | 20 N•m (177 lb-in.) | p. 10 |
| Flywheel Nut Torque (Gasoline Engine) | 108 N•m (80 lb-ft) | p. 10 |
| Diesel Engine Nozzle Torque | 50 N•m (37 lb-ft) | p. 11 |
| 445 | ||
| Spark plug gap/clearance | 0.25 mm (0.010 in.) | p. 71 |
| Fuel pump operating time | 2 seconds | p. 71 |
