Value Proposition:
An inexpensive way to maintain and repair the International Harvester 674 Tractor, empowering DIY users and professional mechanics.
Resource Type:
Primary source for repair and service information, comparable to factory service manuals.
Accessibility:
Instant download, digital format for easy access and printing.
Content Breadth:
Covers all major mechanical and electrical systems comprehensively.
Primary Coverage:
Complete service, repair, and maintenance for the International Harvester 674 Tractor.
Diagnostic Coverage:
Troubleshooting and diagnosis of mechanical and electrical systems.
Electrical Coverage:
Detailed wiring schematics and electrical system repair procedures.
Estimated Page Count:
Not specified, but described as 'complete' and covering 'every detail'.
Manual Type:
Workshop Service Repair Manual / Factory Service Repair Manual
Digital Features:
Zoom IN/OUT functionality, fully printable pages.
Delivery Method:
Instant Download
Software Requirements:
Adobe PDF Reader, WinZip
Operating System Compatibility:
All Versions of Windows & Mac
Engine Mechanical:
Engine mechanical system overhaul, repair, and adjustment.
Engine Electrical:
Engine electrical system diagnosis and repair, including wiring.
Emission Control:
Emission control system operation and servicing.
Fuel System:
Fuel system components, maintenance, and repair.
Suspension:
Front and rear suspension system inspection and repair.
Clutch:
Clutch system operation, adjustment, and replacement.
Transmission Manual:
Manual transaxle system overhaul and repair.
Transmission Automatic:
Automatic transaxle system (if applicable to specific 674 variants) repair.
Driveshaft Axle:
Driveshaft and axle components inspection and service.
Steering:
Steering system diagnosis, repair, and adjustment.
Brakes:
Brake system inspection, maintenance, and repair.
Body Interior Exterior:
Bodywork, interior trim, and exterior component repair and maintenance.
Body Electrical:
Body electrical systems including lighting, controls, and accessories.
Restraint Systems:
Restraint systems (if applicable, e.g., seat belts) inspection and repair.
Maintenance Procedures:
Routine maintenance, fluid changes, filter replacements, lubrication.
Repair Procedures:
Step-by-step repair instructions for all major components and systems.
Troubleshooting:
Detailed troubleshooting guides for common and complex issues.
Rebuild Instructions:
Overhaul and rebuild procedures for engines, transmissions, and other major assemblies.
Diagnostic Procedures:
Diagnostic routines and tests for identifying malfunctions.
Depth Of Information:
Comprehensive, covering everything from basic checks to complete overhauls. Suitable for DIY and professional mechanics.
Illustration Quality:
Detailed illustrations, diagrams, and photos to guide repair processes.
Specification Detail:
Includes critical specifications for all components and systems.
Wiring Schematics:
Explicitly includes wiring schematics for electrical system diagnostics.
Instruction Format:
Numbered steps, substeps, notes, cautions, and warnings.
Navigation:
Numbered table of contents for quick information retrieval.
Highlighting:
Bold figure numbers for easy illustration matching.
Engine Type:
Diesel (specific engine models and configurations for the 674 are likely covered, e.g., D-155, D-179, D-206, D-236 depending on market and year).
Power Output:
Varies by specific engine fitted; typically in the 50-70 HP range.
Torque:
Varies by specific engine fitted; specified within the manual.
Fuel Injection:
Likely a rotary or inline injection pump system, detailed in the manual.
Transmission Type Standard:
Likely a synchronized manual transmission (e.g., 8-speed or 16-speed with creeper).
Transmission Type Optional:
Potentially a Powershift or other transmission options depending on the exact 674 variant and market. The manual explicitly mentions 'Automatic Transaxle System' which suggests this may be covered.
Gear Selection:
Details on gear selection, clutch operation, and power take-off (PTO) engagement.
Engine Oil Change:
Typically every 100-250 operating hours, as specified in the manual.
Fuel Filter Replacement:
Recommended at regular intervals, e.g., every 250-500 hours or annually.
Engine Oil Type:
Refer to manual for specific viscosity grade (e.g., SAE 15W-40 or 20W-50) and API service category (e.g., CD or CE).
Transmission Hydraulic Fluid:
Specific IH validated fluid or equivalent (e.g., UTF - Universal Tractor Transmission Fluid) as per manual specifications.
Common Wear Points:
Potential wear on clutch plates, brake components, hydraulic seals, and linkage points. The manual provides guidance on inspection and repair.
Electrical Gremlins:
As with many tractors of this era, intermittent electrical issues can arise; the included wiring schematics are crucial for diagnosis.
Manufacturer History:
International Harvester (IH) was a major American manufacturer of agricultural machinery, construction equipment, and motor trucks, renowned for its robust and reliable products.
674 Series Context:
The 674 tractor was part of IH's 'New Generation' tractor lineup, designed to offer improved performance, comfort, and versatility for a range of farming applications.
Production Period:
Produced from the early 1970s to the early 1980s. Specific production years for the 674 are covered by the manual's scope.
