Target Audience:
Owners, mechanics, and restoration specialists of International Harvester McCormick B-250 and B-275 tractors
Value Proposition:
Provides comprehensive repair and parts information to enable DIY repairs, significantly reducing maintenance costs
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
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
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
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
Image Resolution:
High Resolution, allowing for clear reproduction of diagrams and text
Digital Binding:
N/A (Downloadable PDF)
Digital Paper:
N/A (Digital Format)
Searchability:
Likely searchable text within PDF, enabling quick information retrieval
Accessibility:
Accessible on PC, Mac, tablets, and smartphones with Adobe Reader
Engine Manufacturer And Model:
International Harvester (IH) BD Series Diesel Engine (e.g., BD-144, BD-154)
Engine Displacement:
Approximately 144-154 cubic inches (2.36 - 2.52 liters)
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
Injection System:
Direct Injection, typically Lucas or Simms fuel injection pumps
Cooling Method:
Water Cooled, Thermosiphon with Fan Assist
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)
Pto System:
Independent PTO (Power Take-Off) and/or Ground Speed PTO, usually 540 RPM
Differential Lock:
Differential Lock typically available for enhanced traction
Operator Interface:
Mechanical controls, basic instrumentation (ammeter, oil pressure gauge, temperature gauge, tachometer optional).
Traction Enhancement:
Differential lock for improved traction in slippery conditions.
Power Take Off Pto:
Standard feature for driving implements, available in single or dual speed configurations.
Engine Oil Change:
Typically every 100-150 operating hours, or annually. Consult specific manual for exact intervals and oil type.
Air Filter Service:
Check and clean regularly, especially in dusty conditions. Replace as needed.
Fuel Filter Replacement:
Recommended at regular intervals (e.g., annually or based on hours), critical for diesel engine health.
Engine Oil Type:
Typically SAE 30 or 10W-30/10W-40 Diesel Engine Oil (API CD or higher rating recommended). Check manual for precise specification.
Transmission Hydraulic Fluid:
IH Hy-Trans or equivalent multi-purpose tractor fluid (UTF). Check manual for correct type and capacity.
Coolant Type:
Ethylene glycol based antifreeze solution mixed with distilled water (50/50 ratio typical). Check manual for specific IH coolant recommendations.
Common Wear Items:
Clutch wear, hydraulic pump performance degradation, starter motor reliability, PTO clutch engagement issues, wear on high-use linkage points.
Engine Potential Problems:
Hard starting in cold weather, fuel injection issues, potential for injector pump wear, oil leaks at seals and gaskets.
Electrical Common Failures:
Wiring harness degradation, generator/alternator failure, starter solenoid issues, battery terminal corrosion.
Manufacturer:
International Harvester (IH), a prominent American manufacturer of agricultural and industrial equipment.
Lineage:
Part of the McCormick International range, successors to the Farmall lineage, representing a transition in tractor design and features.
Production Period:
Produced primarily in the late 1950s and early 1960s.
Manufacturing Location:
Various IH plants, notably in the UK and USA.
