This manual provides comprehensive service and repair information for the McCormick B-250 and B-275 tractors, diesel-powered workhorses introduced in the mid-to-late 1950s. These tractors, part of the renowned 'B' series, were known for their robust construction and versatility in agricultural applications. The B-250, powered by a 144 cubic inch diesel engine, offered approximately 32 PTO horsepower, while the B-275 featured a slightly larger 154 cubic inch diesel engine delivering around 37 PTO horsepower. Both models are characterized by their manual transmissions with 8 forward and 2 reverse speeds, single-plate dry clutches, and reliable direct injection fuel systems, embodying the dependable engineering of their time. The purpose of this factory service repair workshop manual is to guide owners, mechanics, and technicians through all aspects of maintaining and repairing the McCormick B-250 and B-275 tractors. It covers a wide range of systems, including detailed procedures for the engine, transmission, hydraulics, electrical system, steering, brakes, and chassis. Within its extensive pages, users will find step-by-step instructions for maintenance, adjustments, troubleshooting, and complete overhauls, supported by hundreds of detailed diagrams and illustrations. This manual serves as an indispensable resource for ensuring the longevity and optimal performance of these classic tractors. 🏷️ Basic Information Identification Make: International Harvester Brand Sub Division: McCormick Model: B-250 Model Variant: B-275 Product Type: Tractor Documentation Type: Service Repair Workshop Manual 👋 Introduction Market Position Target Audience: Owners, mechanics, technicians, and enthusiasts of International Harvester McCormick B250 and B275 tractors. Competitive Analysis Value Proposition: Provides professional-grade repair and maintenance information, comparable to original factory manuals, for essential tractor upkeep. Key Features Completeness: Full, unrestricted version covering all aspects of repair and servicing. Accessibility: Instant download for immediate access across multiple devices. 📋 Manual Details Coverage Areas Coverage Summary: Comprehensive repair, servicing, and troubleshooting procedures for International Harvester McCormick B250 and B275 tractors. Page Count Estimated Pages: Hundreds of pages (specific count not provided, but indicated as extensive). Manual Type Type: Factory Service Repair Workshop Manual Language Language: English (implied by product description targeting international markets and typical manual language). Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Detailed engine overhaul, diagnostics, tuning, fuel system, lubrication, cooling system. Transmission: Service and repair of the gearbox, clutch, differential, and final drives. Hydraulics: Hydraulic system operation, maintenance, pump and cylinder repair, control mechanisms. Electrical System: Wiring diagrams, starter, generator/alternator, lighting, ignition system troubleshooting. Steering And Brakes: Service procedures for steering linkages, braking system components, and adjustments. Front Axle And Rear Axle: Inspection, repair, and maintenance of front and rear axle assemblies. Body And Chassis: Frame, sheet metal repair, mounting points, and general chassis maintenance. Procedures Included Maintenance: Regular servicing, lubrication schedules, filter replacement, fluid changes. Troubleshooting: Systematic diagnostic procedures for common and uncommon faults. Repair: Step-by-step instructions for component disassembly, repair, and reassembly. Overhaul: Complete engine and major component rebuild procedures. Adjustments: Precise adjustment procedures for engine timing, valve clearance, brakes, etc. Technical Depth Depth: Professional-grade, covering all aspects from basic maintenance to complete engine rebuilds and advanced diagnostics. Diagrams And Illustrations: Hundreds of detailed photos and exploded diagrams for clear visual guidance. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely searchable text content within the PDF, typical of professional manuals. Print Quality Print Capability: Printable (single page or entire manual). Binding Type Binding: Digital Download (no physical binding). Paper Type Paper Type: N/A (Digital format). Licensing Usage Rights: Lifetime use on multiple devices, no expiry dates or renewal fees. Compatibility Operating Systems: Fully compatible with Windows and MAC computers, tablets, and smartphones. ⚙️ Engine Specifications Primary Engine Engine Type: Diesel Engine Model B250: BD-144 (4-cylinder, direct injection) Engine Model B275: BD-154 (4-cylinder, direct injection) Performance Bore Stroke B250: 3.50" x 4.125" (88.9 mm x 104.8 mm) Bore Stroke B275: 3.625" x 4.125" (92.1 mm x 104.8 mm) Displacement B250: 144 cu. in. (2.36 liters) Displacement B275: 154 cu. in. (2.52 liters) Horsepower B250: Approx. 32 PTO HP (23.9 kW) Horsepower B275: Approx. 37 PTO HP (27.6 kW) Fuel System Fuel Type: Diesel Injection System: Direct Injection (likely CAV or Bosch) Fuel Filter Part Number Example: Refer to manual for specific part numbers (e.g., Donaldson P550508 might be applicable). 🔧 Transmission Standard Transmission Type: Manual Gear Configuration: 8 Forward, 2 Reverse speeds (typical for these models). Features Clutch Type: Single plate, dry clutch. Pto Speeds: 540 RPM PTO standard, with potential for 1000 RPM PTO as option or variant. Gear Ratio Information: Detailed gear ratios provided within the manual for diagnosis and repair. 📐 Dimensions Weights Operating Weight Approx B250: Approx. 3,200 - 3,500 lbs (1450 - 1590 kg) Operating Weight Approx B275: Approx. 3,300 - 3,600 lbs (1497 - 1633 kg) Wheelbase Approx: Approx. 75 inches (1905 mm) 🛡️ Safety Features Ratings Safety Features Coverage: Manual covers maintenance and repair of safety-critical components like brakes and steering, but...