IH International Harvester 1256 Service Repair Manual

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Tipo: Tractor

Proveedor:

SKU: 101205

Etiquetas: 1256 IH International International Harvester Tractor

Variantes de producto

Descripción

The International Harvester 1256 is a robust tractor model, produced approximately between 1967 and 1971, representing a significant advancement in agricultural machinery for its time. Known for its powerful diesel engines, including the D-354 or DT-360 variants, and its innovative 16-speed Power Shift transmission, the 1256 was engineered to meet the demanding needs of modern farming. It competed effectively with other major manufacturers and was recognized as a reliable workhorse, capable of handling a wide range of tasks with its strong hydraulic system and durable construction. This model embodies the legacy of International Harvester's commitment to building dependable and high-performing equipment. This comprehensive Service Repair Workshop Manual provides detailed technical information for the International Harvester 1256 tractor. Covering essential areas such as engine overhaul, fuel, cooling, lubrication, transmission, and hydraulic systems, it offers complete disassembly, inspection, repair, and reassembly procedures. The manual also includes guidance on the electrical and braking systems, steering, front and rear axles, and operator station components. With troubleshooting guides, routine maintenance schedules, and specific torque specifications, this English-language digital resource is an indispensable tool for owners, mechanics, and technicians seeking to maintain, diagnose, and repair the IH 1256 effectively.

🏷️ Basic Information

Identification

Make:

International Harvester

Model:

Vehicle Type:

Tractor

Codes

Product Code:

IH-1256-SRM

👋 Introduction

Market Position

Historical Significance:

The IH 1256 was a significant model in International Harvester's tractor lineup, representing advancements in power and features for its era.

Competitive Analysis

Competitors:

Competed with models from John Deere (e.g., 4020), Case (e.g., 930/970), and Ford.

Key Features

Engine Options:

Offered with both International Harvester's own diesel engines and a common option was the highly regarded D-354 or DT-360 diesel.

Transmission Options:

Typically featured a 16-speed Power Shift transmission (Powersync) or a 10-speed manual transmission.

Hydraulic System Capabilities:

Equipped with IH's robust hydraulic system, capable of powering demanding implements.

📋 Manual Details

Coverage Areas

Language:

English

Format:

Digital (likely PDF)

Page Count

Estimated Page Count:

Manual Type

Manual Type:

Service Repair Workshop Manual

📖 Manual Coverage

Systems Covered

Engine Overhaul:

Complete engine disassembly, inspection, repair, and reassembly procedures.

Fuel System:

Fuel injection pump (Bosch or CAV likely), injectors, fuel lines, filters, and fuel tank service.

Cooling System:

Radiator, water pump, thermostat, hoses, and fan assembly service.

Lubrication System:

Oil pump, oil filter, lubrication passages, and oil pressure testing.

Transmission Service:

Disassembly, inspection, and repair of the powershift transmission (if equipped), clutch pack, and gear trains.

Hydraulic System:

Tractor Power Take-Off (PTO), 3-point hitch, remote hydraulic cylinders, hydraulic pump, control valves, and fluid reservoir service.

Electrical System:

Starter motor, alternator, battery, lighting circuits, ignition system (diesel models typically have glow plugs), and control panel diagnostics.

Braking System:

Brake pedal assembly, brake discs/drums, brake hydraulics, and parking brake service.

Steering System:

Power steering pump, steering cylinder, tie rods, and steering linkages.

Front Axle:

Front wheel bearings, kingpins, and drive components.

Rear Axle And Differential:

Rear axle housing, differential gears, final drives, and planetary gears.

Drawbar And Hitches:

Drawbar mounting, PTO shaft, and auxiliary hitch components.

Operator Station:

Seat assembly, steering column, control levers, and dashboard instrumentation.

Procedures Included

Routine Maintenance:

Oil changes, filter replacements, lubrication points, and general inspection checklists.

Troubleshooting Guides:

Diagnostic procedures for common performance issues, symptoms, and their causes.

Major Component Rebuilds:

Detailed instructions for overhauling engines, transmissions, hydraulic pumps, and final drives.

Disassembly And Reassembly:

Step-by-step guides for removing and reinstalling all major components and sub-assemblies.

Adjustment Procedures:

Specifications and methods for adjusting clutch engagement, brake linkages, PTO clutch, and hydraulic controls.

Torque Specifications:

Comprehensive list of torque values for critical fasteners across all systems.

Special Tool Requirements:

Identification and usage of specialized tools required for specific repair procedures.

Technical Depth

Diagnostic Capabilities:

Advanced diagnostic information for identifying and rectifying complex mechanical and hydraulic issues.

Rebuild Instructions:

Detailed, factory-level instructions for complete component rebuilds, suitable for professional mechanics.

Schematics And Diagrams:

Inclusion of detailed hydraulic schematics, electrical wiring diagrams, and exploded views for component identification and assembly.

📊 Manual Specifications

File Format

File Type:

Likely PDF

Searchable Text:

Yes (assuming digitally produced or scanned with OCR)

Print Quality

Image Resolution:

High (for clear diagrams and text)

Binding Type

Binding:

N/A (Digital Format)

Paper Type

Paper Quality:

N/A (Digital Format)

⚙️ Engine Specifications

Primary Engine

Engine Manufacturer:

International Harvester

Engine Model Typical:

D-354 (Naturally Aspirated) or DT-360 (Turbocharged)

Engine Displacement Diesel:

354 cu. in. (5.8 L) or 360 cu. in. (5.9 L)

Cylinders Diesel:

Fuel Type:

Diesel

Performance

Horsepower Rated Drawbar Diesel Na:

Approx. 85 HP

Horsepower Rated Drawbar Diesel Turbo:

Approx. 100 HP

Fuel System

Fuel Injection System:

Inline injection pump (e.g., Bosch or CAV)

🔧 Transmission

Standard

Standard Transmission Type:

16-speed Power Shift (Powersync)

Optional

Optional Transmission Type:

10-speed manual (less common for 1256, but possible variants)

Features

Powershift Gear Selection:

Selectable by lever without clutch pedal engagement.

📐 Dimensions

Exterior

Wheelbase Approx:

92 inches (2337 mm)

Weights

Operating Weight Approx:

8,500 - 9,500 lbs (3855 - 4309 kg)

🛡️ Safety Features

Ratings

Rollover Protection Standard:

ROPS (Roll-Over Protective Structure) was often an option or integrated later in production, depending on regulations and market.

Active Features

Parking Brake:

Mechanical parking brake integrated with main brake system or independent lever.

Passive Features

Seatbelt:

Available with seatbelts if ROPS equipped.

💡 Technology Features

Infotainment

Infotainment System:

None (basic gauges and indicators).

Driver Assistance

Driver Assistance Features:

None.

Connectivity

Connectivity Options:

None.

🔧 Maintenance

Service Intervals

Engine Oil Change Interval:

Typically 100-200 hours, depending on operating conditions and oil type used.

Fuel Filter Replacement:

Recommended every 200-300 hours or as needed if fuel quality is poor.

Hydraulic Oil Change Interval:

Typically 600-1200 hours, with filter changes more frequent.

Fluid Specifications

Engine Oil Type:

API CD or higher rated diesel engine oil, SAE 30 or 15W-40 depending on climate.

Hydraulic Fluid Type:

IH Hytran fluid (or equivalent universal tractor hydraulic fluid meeting IH specification).

Transmission Oil Type:

Depends on Powershift or manual; Powershift typically used dedicated IH Hytran fluid or specific Powershift oil.

Coolant Type:

Ethylene glycol based coolant with appropriate additives for diesel engines, typically a 50/50 mix with distilled water.

Known Issues

Powershift Transmission Wear:

Clutch packs within the powershift transmission can wear over time, leading to slipping or delayed engagement. Requires specialized knowledge for rebuild.

Hydraulic Pump And Cylinder Leaks:

Common wear items leading to loss of hydraulic lift or steering assistance.

Diesel Injector Pump Timing:

Proper timing is crucial for performance and fuel economy; requires specific tools and knowledge to adjust.

Wiring Harness Degradation:

Older tractors may experience brittle or corroded wiring, affecting electrical components.

📚 Vehicle History

Brand Heritage

Brand Legacy:

International Harvester (IH) was a prominent American manufacturer of agricultural and construction equipment, known for robust and reliable machinery.

Model Evolution

Predecessor Models:

Successor to models like the 706/806, sharing some design elements and drivetrain components but offering more power and updated features.

Production

Production Years:

Approximately 1967-1971

Manufacturing Location:

United States (e.g., Louisville, KY; Rock Island, IL)

🏆 Awards & Recognition

Recognitions

Industry Awards:

No specific documented industry awards for this model, but it was considered a reliable workhorse and a strong competitor in its class.