Part of the John Deere Repair Manuals.
Wrenching on the liquid-cooled FD engine in your LX178, LX188, 285, 320, or 425? This 117-page John Deere FD440–FD620 Series Technical Manual PDF (OEM #CTM39) breaks down the FD440V, 501V, 590V, and 620D from carburetor to crankshaft. You get separate repair specifications for each engine, metric torque tables, and step-by-step teardown procedures for the fuel system, governor, cylinder head, and cooling system. Open to the troubleshooting section for compression tests, crankcase vacuum tests, and oil pressure diagnosis, then check the component analysis chapter for wear limits on pistons, rings, and crankshaft. Torque the spark plugs to 17 N-m on the FD440V/501V and 20 N-m on the 590V and 620D, and reject any fuel pump push rod bent past 0.05 mm. No more chasing wear limits through forum threads. Bookmarked and readable on any device; find the spec, walk to the machine, fix it.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 3-5 | Fluids, Chemical Products, Waste Disposal, Service Procedures, Protective Clothing, Asbestos Dust |
| Specifications & Information | 6-27 | Basic Engine Specifications, Test & Adjustment Specifications, Repair Specifications, Metric Torque Values, Gasoline Specifications, Lubricant Specifications, Component Location |
| Intake,Exhaust & Breather | 28-31 | Air Cleaner, Intake Manifold, Muffler, Breather |
| Fuel System & Governor | 32-47 | Carburetor, Mechanical Fuel Pump, Governor, Fuel Injection System, Fuel Injector, Fuel Pressure Regulator |
| Cylinder Head & Valves | 48-53 | Cylinder Head, Head and Valve Components, Valve, Valve Seat, Valve Guide, Push Rod |
| Cylinder Block, Pistons & Rods | 54-67 | Crankcase Disassembly, Pistons, Crankshaft Plain Bearings, Cylinder Block, Piston Rings, Connecting Rod |
| Camshaft, Crankshaft & Flywheel | 68-73 | Camshaft Bearings, Camshaft, Tappets, Crankshaft, Flywheel |
| Lubrication System | 74-79 | Oil Pump, Oil Filter, Oil Pressure Relief Valve, Oil Pressure Switch, Oil Pick-Up Screen |
| Cooling System | 80-89 | Cooling System Operation, Thermostat, Coolant Pump, Cooling Fan, Fan Bracket, Fan Drive Belt |
| Electrical System | 90-99 | Stator, Ignition, Starter, Fuel Injection System, Pulser Coils, Ignition Coils |
| Troubleshooting | 100-109 | Starting Motor, Engine, Performance Diagnosis, Compression Test, Crankcase Vacuum Test, Oil Pressure Test |
| Component Analysis | 110-115 | Valves, Pistons, Ring Wear, Piston Wear, Crankshaft Wear, Connecting Rod Wear |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| FD440V/501V Fuel Pump Push Rod Maximum Bend | 0.05 mm (0.002 in.) | p. 11 |
| FD590V Fuel Pump Push Rod Maximum Bend | 0.05 mm (0.002 in.) | p. 12 |
| FD440V/501V Spark Plug Torque | 17 N•m (150 lb-in.) | p. 9 |
| FD590V Spark Plug Torque | 20 N•m (177 lb-in.) | p. 12 |
| FD440V/501V Water Pump Minimum Shaft O.D. | 9.94 mm (0.391 in.) | p. 13 |
| FD440V/501V Water Pump Maximum Pump and Crankcase Housing Bore I.D. | 10.09 mm (0.397 in.) | p. 13 |
| FD590V Thermostat Opening Temperature | 82°C (180°F) | p. 14 |
| FD590V Thermostat Fully Open Temperature | 95°C (203°F) | p. 14 |
| FD440V/501V Engine Coolant Capacity | 2.10 L (2.2 qt) | p. 13 |
| FD590V Engine Coolant Capacity | 3.04 L (3.2 qt) | p. 16 |
| Charging System Capacity (FD440/501/590V) | 15 Amps | p. 92 |
| Charging System Capacity (FD620D) | 20 Amps | p. 92 |
