The International Harvester McCormick B-250 and B-275 tractors represent robust and reliable agricultural machinery produced primarily in the late 1950s and early 1960s. These tractors, powered by International Harvester BD Series Diesel Engines, were designed as dependable workhorses, crucial for farm productivity and featuring a straightforward mechanical operator interface. Known for their significant low-end torque and versatility, they offered features such as independent PTO and differential locks for enhanced traction and implement operation. Their design, part of the McCormick International lineage, embodied a transition in tractor engineering, making them valued by owners, mechanics, and restoration specialists for their enduring utility. This comprehensive manual set, presented in English, is meticulously designed to assist owners, mechanics, and technicians in the maintenance and repair of the International Harvester McCormick B-250 and B-275 tractors. It includes both a Parts Manual and a complete Workshop Service/Repair Manual, covering every aspect of the tractor from engine overhaul and transmission systems to chassis, electrical, and hydraulic components. Detailed procedures for routine servicing, troubleshooting guides, and exploded views for parts identification are provided, alongside critical technical data, enabling effective diagnostics and repairs to maintain the longevity and performance of these classic machines. 🏷️ Basic Information Identification Make: International Harvester Model: McCormick B-250 / B-275 Product Type: Tractor Product Format: Downloadable PDF Manual Set 👋 Introduction Market Position Target Audience: Owners, mechanics, and restoration specialists of International Harvester McCormick B-250 and B-275 tractors Competitive Analysis Value Proposition: Provides comprehensive repair and parts information to enable DIY repairs, significantly reducing maintenance costs Key Features Digital Convenience: Instant download and email delivery, permanent access, ability to print selectively Completeness: Covers all models, engines, trims, and transmissions; detailed A-Z repair procedures 📋 Manual Details Coverage Areas Manual Set Contents: Includes both Parts Manual and Complete Workshop Service/Repair Manual Page Count Estimated Page Count: Comprehensive (specific page counts not provided in product info, but implied to be extensive) Manual Type Types Included: Parts Manual, Workshop Service Manual, Repair Manual Language Language: English Format Digital Format: PDF Download 📖 Manual Coverage Systems Covered Engine Systems: Engine Overhaul, Fuel System, Ignition System, Lubrication System, Cooling System, Starting System, Exhaust System Transmission Systems: Gearbox, Clutch, PTO (Power Take-Off), Differential, Final Drives Chassis And Suspension: Frame, Front Axle, Steering System, Rear Axle Brake And Clutch Systems: Brakes (Drum/Disc depending on configuration), Clutch Assembly, Clutch Pedal and Linkage Electrical System: Wiring Diagrams, Lighting, Battery, Generator/Alternator, Starter Motor, Ignition Switch, Instrumentation Hydraulic System: Hydraulic Pump, Control Valves, Lift Arm Mechanism, Remote Hydraulics (if applicable) Fuel And Exhaust: Fuel Tank, Fuel Lines, Filters, Injectors, Muffler, Exhaust Piping Body And Fittings: Sheet Metal, Seat, Controls, Fenders, Radiator Shell Procedures Included Maintenance Procedures: Routine Servicing, Lubrication Charts, Filter Changes, Fluid Top-offs, Cooling System Flushes, Air Filter Cleaning/Replacement Repair Procedures: Engine Rebuild, Transmission Overhaul, Clutch Replacement, Brake System Repair, Hydraulic System Troubleshooting and Repair, Electrical System Diagnostics and Repair, Steering System Overhaul Troubleshooting Guides: Diagnostic Flowcharts for Common Problems, Symptom-Based Troubleshooting Parts Identification: Exploded Views, Part Numbers, Assemblies, Component Identification Technical Depth Diagnostic Capabilities: Comprehensive diagnostics for all major systems, including electrical schematics and fuel system testing procedures Rebuild Procedures: Detailed step-by-step instructions for complete engine, transmission, and major component overhauls, including torque specifications and clearances Technical Data: Includes critical technical specifications such as valve clearances, timing marks, compression ratios, fluid capacities, and torque values 📊 Manual Specifications File Format File Type: PDF Print Quality Image Resolution: High Resolution, allowing for clear reproduction of diagrams and text Binding Type Digital Binding: N/A (Downloadable PDF) Paper Type Digital Paper: N/A (Digital Format) Usability Searchability: Likely searchable text within PDF, enabling quick information retrieval Accessibility: Accessible on PC, Mac, tablets, and smartphones with Adobe Reader ⚙️ Engine Specifications Primary Engine Engine Manufacturer And Model: International Harvester (IH) BD Series Diesel Engine (e.g., BD-144, BD-154) Displacement Engine Displacement: Approximately 144-154 cubic inches (2.36 - 2.52 liters) Performance Horsepower Rating: Typically in the 35-45 HP range (exact figures vary by specific model and tune) Torque Rating: Significant low-end torque characteristic of diesel engines of this era Fuel System Fuel Type: Diesel Injection System: Direct Injection, typically Lucas or Simms fuel injection pumps Cooling System Cooling Method: Water Cooled, Thermosiphon with Fan Assist 🔧 Transmission Standard Transmission Gearbox Type: Manual Transmission with constant mesh gears Number Of Speeds: Typically 4 or 8 forward gears and 2 reverse gears (e.g., 4-speed main gearbox with a 2-speed high/low range or creeper gear) Features Pto System: Independent PTO (Power Take-Off) and/or Ground Speed PTO, usually 540 RPM Differential Lock: Differential Lock typically available for enhanced traction 📐 Dimensions Exterior Wheelbase: Varies slightly by model, but generally around 75-80 inches (approx. 190-203 cm) Weights Shipping Weight: Around 3,000-3,500 lbs (approx. 1360-1590 kg) 🛡️ Safety Features Ratings Safety Standards: Designed to meet safety standards of its era; modern safety features like ROPS (Roll-Over...