🏷️ Basic Information

Make:

International Harvester

Model:

B275 / B414

Vehicle Type:

Tractor

Product Name:

IH International Harvester B275 B414 Factory Service Manual PDF Download

👋 Introduction

Market Segment:

Utility tractor segment, popular for small to medium farms, agricultural tasks, and general-purpose land management.

Key Competitors:

Massey Ferguson (e.g., MF35), Fordson (e.g., Dexta, Super Dexta), David Brown, John Deere (comparable models of the era).

Distinctive Features:

Robust construction, reliable British Leyland engines (often), versatile hydraulic system, relatively simple mechanical design making them repairable.

Value To Owner:

Essential for maintaining original performance, diagnosing issues accurately, and performing repairs effectively, saving significant costs on professional servicing.

📋 Manual Details

Systems Covered Summary:

Engine, drivetrain, hydraulics, electrical system, chassis, brakes, steering, operator's station, implements.

Estimated Page Count:

Hundreds (Specific count not provided, but described as comprehensive)

Manual Type:

Factory Service Manual / Repair Manual

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine Systems:

Diesel engine overhaul, fuel system (injection pump, injectors), cooling system, lubrication system, intake and exhaust systems, starting system.

Transmission Systems:

Gearbox (constant mesh, sliding gear), clutch, PTO (Power Take-Off) drive and gears, differential, final drives.

Hydraulic Systems:

Hydraulic pump (e.g., vane type), control valve, lift cover assembly, hydraulic cylinders, remote hydraulic outlets, pressure relief settings.

Electrical Systems:

Wiring diagrams, lighting system, starter motor, generator/alternator, battery, ignition system (if applicable for some variants), instrument panel.

Chassis And Suspension:

Front axle, rear axle, steering mechanism (e.g., steering box, linkage), braking system (mechanical, hydraulic), wheel bearings, drawbar.

Operator Controls:

Dashboard layout, control levers (gearshift, PTO, hydraulics), pedal operation, seat adjustments.

Maintenance Procedures:

Lubrication schedules, filter replacement (oil, fuel, hydraulic), fluid level checks and top-ups, greasing points, general servicing tasks.

Repair Procedures:

Engine overhaul (piston rings, bearings, valve adjustments), clutch replacement, transmission disassembly and reassembly, hydraulic pump repair, brake system overhaul, steering box adjustment.

Troubleshooting Guides:

Diagnostic flowcharts for common problems, identifying symptoms (e.g., poor engine performance, hydraulic leaks, braking issues), fault finding.

Adjustment Procedures:

Valve clearance adjustments, brake linkage adjustments, clutch pedal free play, hydraulic control settings, steering box play.

Depth Of Coverage:

Comprehensive factory-level detail, including disassembly, assembly, specifications, tolerances, and diagnostic information for complete repair and overhaul.

📊 Manual Specifications

File Format:

PDF

Printability:

Printable - designed for users to print specific sections or the entire manual.

Binding Type:

N/A (Digital download)

Paper Type:

N/A (Digital download)

Text Searchability:

Likely text-searchable PDF, allowing quick access to specific topics.

⚙️ Engine Specifications

Engine Model:

Various British Leyland (Perkins variants often used) diesel engines. For B275 typically a BD144 or BD152. For B414 typically BD154.

Engine Type:

4-stroke, naturally aspirated diesel

Bore X Stroke:

BD144: 3.50 in x 4.00 in (88.9 mm x 101.6 mm); BD152/154: 3.50 in x 4.25 in (88.9 mm x 107.95 mm)

Displacement:

BD144: 144 cu. in. (2.36 L); BD152/154: 152 cu. in. (2.49 L)

Horsepower Rating Approx:

B275: ~35-40 PTO HP; B414: ~40-45 PTO HP (Varies by specific engine and configuration)

Torque Output Approx:

B275: ~90-100 lb-ft; B414: ~100-110 lb-ft (Varies)

Fuel Type:

Diesel

Injection System:

Direct injection, typically rotary or inline injection pump (e.g., CAV Simms, Bosch).

Cooling Method:

Water cooled

Oil Capacity Approx:

Engine oil capacity typically around 5-7 quarts (4.7-6.6 L) including filter.

Engine Notes:

Engines are known for their durability and relatively simple design. Specific engine models may vary slightly between production runs and markets.

🔧 Transmission

Transmission Type:

Constant mesh gearbox with sliding gears

Number Of Speeds:

Typically 8 forward speeds and 2 reverse speeds (4 ranges x 2 gears).

Optional Transmission Features:

Some models might have had variations or specialized transmissions for specific applications.

Clutch Type:

Dry single or double plate clutch.

Pto Options:

Standard rear PTO (540 RPM), some may have live PTO or ground-speed PTO options.

Differential Lock:

Yes, foot-pedal operated differential lock.

📐 Dimensions

Wheelbase Approx:

72 inches (1828 mm) for standard configuration.

Length Approx:

125 inches (3175 mm) without linkage.

Width Approx:

65 inches (1651 mm) at rear track.

Height Approx:

55 inches (1397 mm) to top of steering wheel.

Operating Weight Approx:

3,500 - 4,500 lbs (1588 - 2041 kg) depending on configuration.

Drawbar Horsepower Rating Approx:

28-35 HP

Tire Size Front Standard:

6.00-16

Tire Size Rear Standard:

12.4/11-28 or 13.6/12-28

🛡️ Safety Features

Safety Ratings Context:

Tractors of this era were not subject to standardized crash ratings like modern automobiles. Safety features were mechanical and operator-dependent.

Parking Brake:

Yes, mechanical parking brake.

Differential Lock:

Yes, aids traction in slippery conditions.

Operator Station Design:

Open operator station, operator presence sensed by seat switch for PTO/clutch engagement on some later models.

Lighting System:

Headlights, taillights, and turn signals (if equipped/original).

Important Safety Practices:

Always follow operating procedures, use appropriate safety guards, ensure proper tire inflation, use ROPS (Roll-Over Protective Structure) if available and fitted, be aware of PTO shaft hazards.

💡 Technology Features

Infotainment Features:

N/A - these tractors feature basic mechanical instrumentation (oil pressure, temperature, ammeter, fuel gauge) and controls. No electronic infotainment systems.

Driver Assistance Features:

N/A - Primarily mechanical controls. Differential lock offers some traction assistance.

Connectivity Features:

N/A - No electronic connectivity features.

🔧 Maintenance

Engine Oil Change Interval:

Typically every 100-150 operating hours or annually, whichever comes first.

Fuel Filter Change Interval:

Every 250-300 operating hours or as needed if fuel quality is poor.

Hydraulic Filter Change Interval:

Typically every 500-750 operating hours, or when performing hydraulic system service.

Transmission Oil Change Interval:

Every 1000-1200 operating hours or every two years.

Engine Oil Specification:

API CD or CE rated diesel engine oil, SAE 15W-30 or 20W-40 depending on ambient temperature. (Consult manual for exact grade).

Transmission Hydraulic Fluid Spec:

IH Hytran (or equivalent UTF - Universal Tractor Transmission Fluid) or straight SAE 20W-30 or 30W engine oil for some older specifications. Check manual for correct type to avoid clutch damage.

Coolant Specification:

Ethylene glycol based antifreeze mixture (50/50) with distilled water for freeze protection and corrosion inhibition.

Grease Type:

Lithium-based multi-purpose grease, NLGI Grade 2.

Common Wear Points:

Clutch wear, PTO engagement issues, hydraulic pump wear, steering box looseness, starter motor reliability, potential for diesel injector pump wear.

Typical Repairs:

Engine rebuilds (pistons, rings, bearings), clutch replacement, hydraulic cylinder seal replacement, injector pump and injector overhaul.

Importance Of Cleanliness:

Maintaining cleanliness of hydraulic fluid, fuel, and air intake is critical to longevity due to the mechanical nature of the components.

📚 Vehicle History

Brand Origin:

International Harvester (IH) was an American manufacturer of agricultural machinery, construction equipment, trucks, and household appliances. Founded in 1902.

Predecessors:

B275 and B414 are part of IH's successful range of small to medium utility tractors, evolving from earlier models like the Super BMD series.

Successors:

These models were foundational for subsequent IH tractor lines, eventually leading to models like the 454, 474, 574, etc., produced after the merger with David Brown to form IH-D B, then later IH McCormick.

Production Period:

B275: ~1955-1958. B414: ~1958-1961.

Manufacturing Location:

Primarily manufactured in the United Kingdom (e.g., Bradford, Yorkshire) for European and global markets.

Impact On Agriculture:

Provided reliable and cost-effective power for a generation of farmers, contributing significantly to mechanization in many countries.

🏆 Awards & Recognition

Historical Awards Or Recognition:

While specific awards for the B275 or B414 are not widely documented, they were highly regarded in their time for reliability and value, contributing to International Harvester's strong market presence globally.