Target User:
Owners, operators, and maintenance personnel for the International Harvester 674 tractor
Value Proposition:
Empowers users to perform their own repairs, saving significant costs on labor and professional services.
Ease Of Use:
Easy-to-follow step-by-step instructions
Information Completeness:
Covers all services and repairs, including routine maintenance
General Coverage:
All areas of repair, routine maintenance, services
Specific Systems:
Engine, transmission, hydraulics, electrical system, steering, brakes, drivetrain, operator station, PTO, hitch
Estimated Page Count:
Not specified, but described as 'in depth' and 'full professional quality'
Type:
Service Repair Manual
Delivery Method:
Instant Download
Software Requirement:
Adobe PDF Reader
Compatibility:
All Versions of Windows & Mac
Engine:
Detailed diagnostics, overhaul procedures, component testing, troubleshooting
Transmission:
Rebuild instructions, gear synchronization, clutch adjustments, hydraulic control system
Hydraulics:
Hydraulic pump service, cylinder repair, valve body diagnostics, fluid flow charts
Electrical System:
Wiring diagrams, component testing, starter, alternator, lighting system, ignition system (if applicable)
Steering:
Power steering system service, linkage adjustments, component replacement
Brakes:
Brake system overhaul, hydraulic line inspection, brake component replacement
Drivetrain:
Front and rear axle service, driveshaft maintenance, differential troubleshooting
Operator Station:
Control linkages, seating adjustment, platform repairs
Pto:
Power Take-Off unit service, engagement mechanisms, gear maintenance
Hitch:
Three-point hitch service, hydraulic lift components, draft control adjustments
Routine Maintenance:
Oil changes, filter replacements, lubrication points, daily checks
Troubleshooting:
Diagnostic charts, symptom-based repair guidance
Component Repair:
Step-by-step instructions for disassembly, repair, and reassembly of all major components
Adjustments:
Clutch, brakes, hydraulics, PTO engagement, steering
Diagnostics:
Electrical testing, hydraulic pressure testing, engine performance checks
Depth:
Comprehensive, suitable for professional technicians and skilled DIY users
Visual Aids:
Pictures, illustrations, and wiring diagrams included
Engine Family:
Likely based on International Harvester's D-series or BD-series engines
Displacement:
Typically in the range of 2.5 to 3.5 liters for this class of tractor, specific displacement for 674 needs manual verification.
Horsepower:
Approximate range of 50-70 PTO horsepower, depending on specific engine variant. Manual will provide exact figures.
Torque:
Specific torque figures will be detailed in the manual.
Injection System:
Likely rotary or inline injection pump. Manual will specify model and service procedures.
Transmission Type:
Likely a synchronized constant mesh gearbox, possibly with a multi-speed range transmission (e.g., 8-speed or 16-speed).
Optional Transmission:
Possible options might include a creeper gear or powershift capabilities depending on the specific build, though less common for this model year.
Clutch:
Dual-stage clutch for PTO engagement and transmission drive.
Gear Ratios:
Detailed gear ratios for all forward and reverse speeds will be found in the manual.
Transmission Fluid Type:
Specific fluid type (e.g., IH Hy-Trans, or equivalent universal tractor transmission fluid - UTTO) and capacity will be in the manual.
Wheelbase:
Approximate wheelbase for tractors of this era and size is typically around 80-90 inches. Manual will provide exact measurement.
Overall Length:
Will vary based on hitch configuration, but typically in the 120-140 inch range. Manual is the definitive source.
Operating Weight:
Typically in the 4,000-5,500 lb range. Manual will list specific base operating weight.
Rollover Protection:
ROPS (Roll-Over Protective Structure) may be standard or optional depending on the market and year of manufacture. Manual will specify available configurations.
Braking System:
Hydraulically activated, internal expanding shoe or disc brakes. Manual details service.
Seatbelt:
Seatbelt availability will depend on ROPS installation. Manual may cover installation and use.
Engine Oil Change:
Typically every 250-500 operating hours. Manual will specify exact interval and oil type.
Transmission Fluid Change:
Typically annually or every 500-1000 operating hours. Manual will specify exact interval and fluid type.
Hydraulic Fluid Change:
Similar to transmission fluid change intervals. Manual will provide specific guidance.
Engine Oil Viscosity:
Likely SAE 15W-40 or 30W for diesel engines. Manual will confirm.
Coolant Type:
Ethylene glycol based antifreeze, typically a 50/50 mix with distilled water. Manual will specify type and capacity.
Common Wear Items:
Clutch plates, hydraulic seals, PTO components, and common wear on linkage points are typical for tractors of this age and usage.
Electrical Gremlins:
Corroded connections, aging wiring harnesses, and failing switches can be common. The manual's wiring diagrams are crucial for diagnosis.
Manufacturer:
International Harvester (IH), a historic American manufacturer of agricultural and industrial machinery.
Series Context:
The 674 falls within IH's 'Hydro 06 Series' or similar contemporary tractor lines, known for their utility and versatility.
Production Years:
The 674 model was produced in the mid-to-late 1970s. Exact years are best confirmed via the manual or serial number reference.
Manufacturing Location:
Likely manufactured in the United States or Europe by International Harvester.
