Target Audience:
Owners, technicians, and mechanics performing maintenance, repair, and diagnostics on International Harvester 248, 258, 278, and Hydro 268 tractors.
Value Proposition:
Comprehensive factory-level documentation for lifetime use, providing the same information used by professional mechanics.
Licensing:
Unlimited usage across multiple devices, no expiry dates, no renewal fees.
Compatibility:
Fully compatible with all Windows and MAC computers.
Coverage Scope:
All repairs, servicing, and troubleshooting procedures for International Harvester 248, 258, 278, and Hydro 268 tractors.
Estimated Page Count:
Hundreds of pages
Type:
Factory Service & Repair Workshop Manual
Printability:
Printable (single pages or entire manual)
Binding:
Digital Download (N/A)
Paper Quality:
Digital Download (N/A)
Engine:
Detailed engine overhaul, troubleshooting, and component repair (e.g., fuel system, cooling system, lubrication).
Transmission:
Repair and service of mechanical and hydrostatic transmissions, including gearboxes, clutch, and hydrostatic drive units.
Hydraulics:
Operation, maintenance, and repair of the hydraulic system, including pumps, valves, cylinders, and auxiliary equipment.
Electrical:
Complete electrical system diagnosis, wiring diagrams, component testing, and repair of starting, charging, and lighting systems.
Chassis:
Front axle, steering, brakes, and rear axle assembly maintenance and repair.
Operator Station:
Dashboard, controls, seating, and safety features.
Maintenance:
Scheduled maintenance, lubrication, filter changes, and general upkeep procedures.
Troubleshooting:
Systematic diagnostic procedures and symptom-based troubleshooting guides for common and uncommon issues.
Repair:
Step-by-step instructions for component removal, disassembly, inspection, repair, and reassembly.
Overhaul:
Complete engine, transmission, and hydraulic system overhaul procedures.
Technical Adjustments:
Precise adjustments for fuel injection timing, valve clearance, clutch engagement, and hydraulic pressures.
Depth:
Professional level, covering detailed component specifications, torque values, clearances, and diagnostic fault codes.
Diagrams:
Hundreds of detailed photos and exploded diagrams for clear visual guidance.
Engine Type:
Diesel (Specific engine models vary by tractor variant, typically 3 or 4-cylinder International Harvester/McCormick engines).
Horsepower Range:
Estimated 45-70 PTO horsepower (Varies by specific model and engine configuration).
Injection System:
Typically rotary or inline injection pumps (e.g., CAV, Bosch) with associated troubleshooting and timing procedures.
Transmission Type Standard:
Constant mesh, sliding gear transmission (3-point hitch models).
Transmission Type Optional:
Hydrostatic transmission (Hydro 268 and potentially other variants).
Clutch:
Single or dual-stage dry clutch (depending on PTO and transmission).
Power Takeoff:
Live PTO and/or independent PTO (specifications detailed in manual).
Features:
Basic operator controls, gauges for engine status (oil pressure, coolant temperature, fuel level), tachometer.
Features:
Power steering (often optional or power-assisted), differential lock.
Engine Oil Change:
Typically every 100-250 operating hours or annually (refer to manual for specific interval).
Fuel Filter Change:
As needed or every 250-500 hours.
Hydraulic Fluid Change:
Typically every 500-1000 operating hours.
Engine Oil Viscosity:
Typically SAE 30W or 15W-40 Diesel Engine Oil (refer to manual for exact API rating).
Hydraulic Fluid Type:
IH Hy-Tran Fluid or equivalent UTF (Universal Tractor Transmission Fluid) meeting IH specifications.
Coolant Type:
Ethylene Glycol based antifreeze (typically 50/50 mix with water).
Common Wear Items:
Clutch wear, hydraulic pump and valve wear, starter motor issues, radiator leaks, injector pump calibration.
Electrical Problems:
Corrosion in wiring harnesses, faulty light switches, alternator or generator issues.
Heritage:
International Harvester (IH) was a major American manufacturer of agricultural and construction equipment, known for its durable and reliable machinery.
Model Lineage:
The 248, 258, 278 series were part of IH's utility tractor line, designed for general farm work, offering various configurations to suit different needs.
Production Period:
Typically produced in the late 1970s and early 1980s.
