From the Vary-Touch hydraulics and three-point linkage through the PTO, belt pulley, brakes and electrical system, this International Harvester B-275 operator manual PDF covers the whole tractor in 106 pages under OEM ID 1026273R6. Diesel and petrol wiring diagrams trace each circuit from the battery, generator and starting motor out to the glowplugs or the petrol ignition system, so a no-start becomes a continuity check. Operation fills the largest share of the book, with remote cylinders, auxiliary control valves, check chains, wheel weights and tread adjustment, while the lubrication chart, routine servicing schedule and fault tracing pages show you what to grease, when to do it, and why the engine won't idle. Set fan belt tension to 3/8 to 1/2 inch and generator belt tension to 1/4 inch. A parked tractor burns daylight you can't get back. The PDF is bookmarked and has a searchable text layer, so it goes with you to the shed, the headland or wherever your B-275 stopped.
What's Inside This International Harvester B-275 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Description | 9 | Tractor Front View, Tractor Rear View, Tractor Components |
| Introduction | 10 | General, Serial Numbers, Tractor Serial Number, Engine Serial Number |
| Specifications | 11-14 | Engine, Tractor Speeds, Tyre Pressures, Coolant System, Capacities, Bolt Torques |
| Instruments and Controls | 15-19 | Clutch Pedal, Brake Pedals, Gear Shift Lever, Governor Control Lever, Keyswitch, Engine Stop Control |
| For Better Performance and Safe Operation | 20 | Safety Shields, Air Cleaner, Lubricating Oils, Radiator, Fuel Storage, Brake Pedals |
| Before Starting a New Tractor | 21 | Battery, Crankcase Oil, Air Cleaner |
| Preparing the Tractor for Each Day's Work | 22-23 | Fuel Tank, Water Drain Tap, Fuel Shut-Off Tap, Coolant Level, Tyre Pressures |
| Operation | 24-52 | Operating the Engine, Driving the Tractor, Operating the Vary-Touch Hydraulic System, Self Sealing Coupling, Operating Remote Cylinders, Auxiliary Control Valves |
| Preventive Maintenance | 53-63 | Lubricant Specifications, Lubrication Guide, Lubrication Chart, Cold Weather Precautions, Hot Weather Precautions, Routine Servicing Schedule |
| Maintenance | 64-97 | Cooling System, Air Cleaning System, Engine Maintenance, Diesel Fuel System, Petrol Fuel System, Engine Clutch, Transmission, Axles |
| Fault Tracing | 98-100 | Engine Starting, Engine Power, Engine Idling, Engine Overheating, Oil Pressure, Oil Consumption |
| Storing the Tractor | 101 | |
| Starting the Engine After Storage | 102-106 | Valve Mechanism, Crankcase, Oil Filter, Air Cleaner, Cooling System, Battery |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder head nuts | 75-80 lb ft (10.04-11.06 kgm) | p. 12 |
| Cylinder head bolt torque | 75 to 85 lb ft | p. 69 |
| Fan belt tension | 3/8 to 1/2 inch | p. 65 |
| Generator belt tension | 1/4 inch | p. 85 |
| Cylinder head nuts torque | 75-80 lb ft | p. 12 |
| Clutch pedal pinch bolts torque | 35-40 lb ft | p. 12 |
International Harvester B-275 Common Problems This Manual Covers
International Harvester B-275 fan belt and radiator core checked but engine still overheats under load
Check the overheating causes in the fault tracing chart on page 98 before refilling anything. Follow the cooling section steps for removing the radiator cap and adding coolant to an overheated system, clean chaff out of the radiator core, and set fan belt tension to 3/8 to 1/2 inch per page 65.
Manual Section: Cooling System Maintenance p. 65Engine cranks normally on the starter after sitting or a filter change but will not start
Drain the water trap, clean the fuel lift pump strainer, and replace the fuel filter element if it is due. Vent the fuel system to purge air before cranking again. Work through the will not start chart on page 98 to rule out the remaining causes and get back in the field.
Manual Section: Fault Tracing p. 98Engine shows low lubricating oil pressure and excessive oil consumption between oil changes
Check the crankcase oil level first and confirm the oil grade against the lubricant specifications starting on page 53. Replace the oil and filter if overdue, clean the crankcase breather and filler cap, then trace low pressure and oil consumption through the fault tracing chart on page 98.
Manual Section: Fault Tracing p. 98Battery discharges repeatedly and the engine will not turn over on the starter
Clean the battery terminals and check specific gravity in each cell. Inspect the fuses, set generator belt tension to 1/4 inch following page 85, and check the generator brush gear. Work the battery discharged and engine will not turn checks in the fault tracing chart starting on page 98 before buying a new battery.
Manual Section: Electrical System Maintenance p. 85Brakes drag with the pedals released or will not hold the tractor when applied
Lubricate the brake linkage, then adjust the brakes and the parking brake following the brake maintenance steps. Review the brake pedal guidance on page 20, and run through the brakes do not hold and brakes drag entries in the fault tracing chart starting on page 98 if the problem returns.
Manual Section: Fault Tracing p. 98Gear shift lever hard to move into gear with the clutch pedal pushed fully down
Adjust the clutch following the engine clutch maintenance steps and lubricate the clutch pedal shaft and release sleeve. Check that the clutch pedal pinch bolts hold 35-40 lb ft per page 12. Then work the gears hard to shift entry in the fault tracing chart starting on page 98 before forcing the lever.
Manual Section: Fault Tracing p. 98Frequently Asked Questions
How do I bleed the fuel system on an International Harvester B-275?
To vent the diesel fuel system, ensure the fuel shut-off valve is open and the engine stop control is pushed in. Loosen the banjo bolt on the fuel filter, operate the fuel lift pump priming lever until fuel flows without air bubbles, and tighten the bolt. Repeat this process for the inlet pipe at the injection pump, and the lower and upper vent screws on the pump body, as detailed on page 73. p. 73
How do I adjust the clutch on an International Harvester B-275?
The clutch pedal free movement should be 7/8 inch for Standard and Dual clutches, or 1-7/8 inches for the Heavy Duty clutch, measured at the pedal pad. To adjust, loosen the pinch bolts and rotate the pedal around the clutch release shaft until the correct free movement is achieved. Ensure the pinch bolts are torqued to 50 lb ft. p. 75
How do I adjust the brakes on an International Harvester B-275?
The correct pedal free movement for the brakes is 1-3/4 inches, measured at the pedal pad. To adjust, slacken the two nuts on the operating rod and adjust them until the required free travel is obtained, then re-tighten the nuts. p. 79
What is the correct cylinder head bolt torque for the B-275 engine?
The cylinder head bolts must be tightened evenly and progressively in the specified sequence to a final torque of 75 to 85 lb ft. p. 69
What is the valve clearance specification for the B-275 engine?
The valve clearance for both diesel and petrol engines should be set to .020 inch with the engine warm. p. 70
Do I get instant access to this International Harvester B-275 Operator Manual?
One searchable PDF covering 106 pages, delivered instantly. No disc, no shipping, no waiting on the post.
Is this International Harvester B-275 manual print-friendly?
Yes. Print the pages or sections you need for your own shop use. Any standard printer works.
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