Target Audience:
Professional technicians, DIY mechanics, tractor owners performing repairs and maintenance
Delivery:
Instant Download, no shipping costs or delays
Benefit For Users:
Enables users to perform maintenance and repairs themselves, saving on labor costs
Document Origin:
Written by manufacturers, original workshop manual content
Primary Coverage:
Service, Repair, Maintenance, Diagnostics, Overhaul
Estimated Pages:
Hundreds (specific number not provided, but indicated as extensive)
Type:
Workshop Service Manual, Repair Manual
Delivery Method:
Instant Download
Engine:
Full engine repair, overhaul, troubleshooting, diagnostics, fuel system, cooling system, lubrication system
Transmission:
Gearbox repair, clutch, power take-off (PTO), differential, final drives
Hydraulics:
Hydraulic system repair, pump, cylinders, valves, control systems
Electrical:
Wiring diagrams, starter, alternator, lighting, ignition system, troubleshooting
Chassis:
Frame, steering, suspension, axles, brakes
Operator Station:
Controls, dashboard, operator comfort features
Maintenance:
Periodic maintenance charts, lubrication schedules, fluid changes
Repair:
Step-by-step repair instructions for all major systems
Troubleshooting:
Diagnostic procedures for common and uncommon issues
Overhaul:
Complete engine and component overhaul procedures
Depth:
Comprehensive, suitable for professional technicians and advanced DIY mechanics
Engine Family:
International Harvester D-Series
Displacement Cc:
3170 (approx. for common variants)
Cylinder Count:
3 or 4 (depending on specific engine variant of the 674)
Horsepower Gross:
Approx. 60-70 HP (specific figures vary by engine variant and tuning)
Injection System:
Inline injection pump (e.g., CAV, Bosch)
Transmission Type:
Manual
Gear Configuration:
Multiple forward and reverse gears (e.g., 8 forward, 4 reverse, or more with Hi-Lo range)
Power Take Off Pto:
Standard PTO, often 540 RPM and/or 1000 RPM
Clutch Type:
Dual-stage clutch (one for transmission, one for PTO)
Engine Oil Change:
Typically every 250-500 hours or annually (specific interval detailed in manual)
Air Filter Check:
Daily or as needed based on operating conditions
Engine Oil Type:
API CD or CE rated diesel engine oil, SAE 10W-30 or 15W-40 (refer to manual for exact viscosity)
Transmission Hydraulic Fluid:
IH Hytran or equivalent universal tractor transmission fluid (UTTF) / UTF-M (refer to manual)
Coolant Type:
Ethylene glycol based antifreeze with corrosion inhibitors (50/50 mix with distilled water)
Common Wear Points:
Clutch wear, PTO engagement issues, hydraulic system leaks, starter motor reliability, injector pump calibration
Electrical Problems:
Wiring harness degradation, corrosion on electrical connectors
Brand Significance:
International Harvester was a major American manufacturer of agricultural machinery, construction equipment, and vehicles.
Series Context:
The 674 was part of IH's popular range of medium-duty tractors, known for their reliability and versatility.
Production Years:
Mid-1970s to early 1980s (approximate)
