All 69 pages of this International Harvester Farmall H and 4 Series Service Manual zero in on the full family. Inside you get a full ignition section covering the magneto and impulse coupling, plus page after page of exploded views, torque tables, and step-by-step procedures for the engine, clutch, transmission, differential, bevel gears, steering gear, and PTO. Set your spark plug gap at .020–.025 inch using the 18 mm / 7/8-inch hex plug, then dial the governor to 1815 r.p.m. high idle — both numbers are pulled straight from the factory spec sheets. Old iron doesn't have to mean guesswork. Bookmarked and searchable; jump to any system in seconds and get the exact procedure you need before you pull a single bolt.
What's Inside This Farmall Farmall H and 4-Series Manual
| System | Pages | Key Topics |
|---|
| Introduction and Brief Descriptions | 8-17 | Introduction, Brief Descriptions, Serial Number Identification |
| Engine | 18-19 | Cylinder Head, Valves, Piston Assembly, Cylinder Sleeves, Connecting Rods, Crankshaft, Timing Gears |
| Ignition System | 20-21 | Magneto, Spark Plugs |
| Engine Lubrication System | 22-23 | Service |
| Electrical Equipment | 24-25 | Generator, Battery, Cutout Relay, Lighting Switch, Starting Motor, Flywheel Ring Gear |
| Cooling System | 26-28 | Heat Indicator, Thermostat, Water Pump, Radiator |
| Fuel System and Air Cleaner | 29-41 | Engine Governor, Manifold, Governor Control, Carburetor, Air Cleaner |
| Engine Clutch | 42-43 | Adjustment, Inspection |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Farmalls H & HV, W-4, 0-4, I-4, IU-4 |
| High idle speed (governor adjustment target) | 1815 r.p.m. | p. 15 |
| All Models |
| Magneto gear, number of teeth | 24 | p. 20 |
| Impulse coupling missing speed | 150 r.p.m. | p. 20 |
| Spark plug gap | .020 - .025 inches | p. 20 |
| Spark plug size | 18 mm. 7/8 in. hex. | p. 20 |
| Engine Oil Capacity | 6 quarts | p. 22 |
| Water Cooling System Capacity | 4 1/4 gallons | p. 26 |
| Cylinder Head Studs Torque | 70 ft.lb. | p. 15 |
| Brake Pedal Free Movement | 1-3/8 inches | p. 46 |
| Bevel Gear Backlash | .008 to .012-inch | p. 48 |
| Farmalls H, HV, W-4 |
| Clutch Pedal Free Movement | 1-1/8 inches | p. 42 |
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