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IH International

IH International Harvester 674 Service Repair Workshop Manual

IH International Harvester 674 Service Repair Workshop Manual

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Machine data plate
Brand
IH International
Equipment
Tractors
Models covered
674
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

What happens after you pay

  • Download link opens on the order page immediately
  • The same link is emailed to you — re-download any time
  • Open on phone, tablet or PC; print only the pages you need
  • Not sure it covers your serial range? Ask us before you buy
🏷️ Basic Information
Identification
Make:
International Harvester
Model:
674
Model Variant:
Utility tractor
Production Years:
1973-1976
👋 Introduction
Market Position
Target Audience:
Farmers, ranchers, and agricultural contractors needing a dependable utility tractor
Competitive Advantage:
Renowned for its robust build, ease of service, and versatility across a range of implements
Key Features
Engine:
Powerful 4-cylinder diesel engine (see Engine Specifications)
Transmission:
Synchronized shuttle transmission with multiple speeds (see Transmission)
Hydraulics:
Lift capacity and draft control for mounted implements
PTO:
Independent PTO with live power for constant operation
📋 Manual Details
Coverage Areas
Engine Systems:
Complete overhaul and repair procedures
Chassis:
Transmission, drivetrain, braking, steering, suspension
Electrical:
Wiring diagrams, starting and charging system diagnostics
Hydraulics:
Pump, valves, cylinders, and lift assembly
Bodywork:
Sheet metal, hood, and cab components
Manual Specifications
Page Count:
Approximately 850 pages
Manual Type:
Factory Service Repair Manual
Language:
English
Format:
PDF
Delivery Method:
Instant download
📖 Manual Coverage
Systems Covered
Engine:
Disassembly, inspection, rebuilding, and troubleshooting
Cooling:
Radiator, water pump, thermostat, hoses
Lubrication:
Oil pump, filter, and pressure checks
Fuel System:
Injection pump, injectors, fuel lines, filters, and bleeding
Electrical System:
Wiring, battery, alternator, starter, lights, and gauges
Transmission:
Gearbox, clutch, shifting mechanisms, and PTO
Drivetrain:
Differential, final drives, axles, and reduction gears
Brakes:
Mechanical and hydraulic actuation, linings, and adjustments
Steering:
Support, steering gear, tie rods, and power assist
Suspension:
Front axle oscillation limits and pivot points
Hydraulic System:
Pump, flow control, valves, cylinders, and implement lift
Procedures Included
Maintenance:
Routine service schedules and lubrication points
Repair:
Step-by-step procedures for component replacement
Rebuild:
Complete engine, transmission, and hydraulic overhauls
Technical Depth
Level:
Advanced, with specifications, tolerances, and torque values
Illustrations:
Diagrams, photos, and exploded views
Parts Information
Parts Identification:
Referenced with part numbers where available
Compatibility:
Applicable to all styles of the 674 model
📊 Manual Specifications
File Format
File Type:
PDF
Compatibility:
Adobe Acrobat Reader, most modern devices
Requirements:
No special software; digital download
Searchability:
Full text searchable for easy navigation
Print and Binding
Print Quality:
High resolution for clear details
Binding Type:
Digital (no physical binding)
Paper Type:
N/A - digital product
⚙️ Engine Specifications
Primary Engine
Type:
International Harvester D206 diesel
Cylinders:
4
Displacement:
206 cubic inches (3.4 liters)
Rated Power:
67 horsepower at 2400 RPM (approx.)
Torque:
Not specified in manual
Fuel System
Type:
Indirect injection diesel
Injection Pump:
Distributor type
🔧 Transmission
Standard Transmission
Type:
Synchromesh with shuttle shift
Speeds:
8 forward, 4 reverse
Optional Transmission
Type:
Hydraulic shuttle (where available)
Speeds:
12 forward and 4 reverse (where fitted)
Features
Clutch:
Dry single disc
PTO:
Independent, 540 RPM at rated engine speed
All-Wheel Drive:
Available on some variants
📐 Dimensions
Exterior Dimensions
Wheelbase:
Approximately 3,680 mm (145 inches)
Length:
Approximately 3,480 mm (137 inches)
Weights
Curb Weight:
Approximately 2,950 kg (6,500 lbs)
🛡️ Safety Features
Ratings and Tests
Rollover Protection:
ROPS cab or frame available on some models
Brake Performance:
Mechanical disc or drum brakes, not rated
Active Safety Features
Wet Disc Brakes:
Hydrostatic or mechanical, responsive
Passive Safety Features
Seat Belt:
Provided when ROPS fitted
Shielded Components:
PTO and belts guarded
💡 Technology Features
Infotainment
Audio System:
None - basic tractor
Driver Assistance
Draft Control:
Hydraulic sensing for three-point hitch
Position Control:
Hydraulic lift position control
🔧 Maintenance
Service Intervals
Engine Oil:
Every 100 hours or annually
Transmission/Hydraulic Fluid:
Every 500 hours
Coolant:
Every 1,000 hours or two years
Air Filter:
Clean daily; replace as needed
Fluid Specifications
Engine Oil Grade:
SAE 30 or 15W-40 (API SF/CD)
Hydraulic Oil:
IH Hy-Tran or equivalent
Cooling System Capacity:
Approximately 3.5 gallons (15.9 liters)
Common Issues and Wear Items
Fuel Injectors:
May clog or wear; periodic inspection
Water Pump Seal:
Leakage over time; replace if weeping
Brake Linings:
Subject to heavy wear in field use
Hydraulic Hoses:
Deterioration from UV and heat; periodical check
📚 Vehicle History
Brand Heritage
Manufacturer:
International Harvester Company (IHC)
Model Evolution
Predecessor:
IH 544 and 574
Successor:
Replaced by Shibaura-based IH 384 or competitive models after merger
Production Location
Plant:
Manufactured in Doncaster, England, and Rock Island, Illinois, USA
🏆 Awards & Recognition
Model Recognitions
Reputation:
Regarded as a reliable and durable utility tractor, valued in the vintage market

Delivery & file format

This is a digital PDF download, not a printed book. After payment the download link appears on your order confirmation page and is emailed to the address you entered. Files open in any PDF reader on phone, tablet or computer and can be printed.

Check the serial range before you buy

Manufacturers change procedures and part numbers by serial-number break. If your data plate shows a serial prefix that is not listed above, contact us with the model and serial number and we will confirm coverage before you order.

View full details
  • Instant download PDF link on your order page and by email right after payment.
  • Secure checkout Encrypted Shopify checkout — we never see your card.
  • Print-ready PDF Searchable text, print the pages you need for the workshop.
  • Phone, tablet, PC Open it in the cab, the workshop or the office.