Target User:
Owners, operators, mechanics, and restoration specialists of the IH 756 tractor.
Value Proposition:
Essential resource for maintaining, repairing, and troubleshooting the IH 756, maximizing uptime and ensuring longevity.
Manual Advantage:
Provides authoritative, manufacturer-level repair information not readily available in generic manuals.
Accessibility:
Instant download allows for immediate access for on-the-job repairs or planning.
Comprehensiveness:
Covers all major mechanical and hydraulic systems specific to the 756 model.
Engine:
Detailed breakdown, overhaul, diagnostics for all engine variants (D-236, D-263, DT-263, D-310, DT-310).
Fuel System:
Inspection, testing, and repair of injection pumps (IH DPA/DPR, CAV B Specification), injectors, fuel lines, and filters.
Cooling System:
Radiator, water pump, thermostat, hoses, fan, and coolant specifications.
Ignition System:
Spark plug testing, timing procedures (for gasoline models, though less common on 756).
Clutch:
Single and dual-stage clutch service, adjustment, and replacement.
Transmission:
Gearbox overhaul, shifting mechanisms, and maintenance for the 2WD and potentially 4WD configurations.
Power Take Off Pto:
Service and repair of the rear PTO (540/1000 RPM) and potentially the independent PTO clutch.
Hydraulics:
IH Farmall 'C' and 'D' series hydraulic systems, including pump, valves, cylinders, and filter service.
Rear Axle And Differential:
Overhaul, lubrication, and adjustment of the rear axle assembly and differential.
Brakes:
Service and adjustment of the internal expanding shoe brakes and parking brake.
Steering:
Mechanical and potentially power steering systems, including linkages and components.
Electrical System:
Wiring diagrams, component testing (alternator, starter, battery), and troubleshooting for lights and instrumentation.
Front Axle And Steering Linkage:
Inspection and repair of the front axle, kingpins, tie rods, and steering arms.
Operator Station:
Details on controls, seat, fenders, and dashboard components.
Preventive Maintenance:
Detailed scheduled maintenance tasks, lubrication points, and fluid change intervals.
Troubleshooting Guides:
Systematic diagnostic procedures for common and uncommon operational issues.
Disassembly And Assembly:
Step-by-step instructions for component removal, overhaul, and reinstallation.
Adjustment Procedures:
Specific torque values, clearances, and settings for various components.
Rebuilding Procedures:
Comprehensive instructions for rebuilding major components like engines, transmissions, and hydraulic pumps.
Diagnostic Testing:
Procedures for testing the functionality and performance of key systems and components.
Depth Of Coverage:
Comprehensive, from basic operator maintenance to full engine and transmission rebuilds.
Detail Level:
Highly detailed with specific measurements, torque specifications, and schematic diagrams.
Diagrams And Illustrations:
Numerous exploded views, line drawings, and system schematics to aid in repair.
Engine Options:
IH D-236 (236 cu in), D-263 (263 cu in), DT-263 (263 cu in Turbocharged), D-310 (310 cu in), DT-310 (310 cu in Turbocharged).
Horsepower Range:
Approx. 60-75 PTO horsepower (varies by engine and specific configuration).
Torque Specifications:
Refer to specific engine variant sections for detailed torque figures for engine components.
Injection System Type:
Roosa Master (Stanadyne DPA), CAV B Specification, Bosch (less common).
Cooling Medium:
Water/Antifreeze mixture.
Engine Oil Change:
Typically every 100-200 operating hours or annually, depending on operating conditions (refer to manual).
Hydraulic Fluid Change:
Typically every 1200-1500 operating hours or annually (refer to manual).
Transmission Fluid Change:
Typically every 1200-1500 operating hours or annually (refer to manual).
Engine Oil Type:
API CD or CE rated diesel engine oil (e.g., SAE 30 or 15W-40 depending on temperature).
Engine Oil Capacity:
Approx. 8-10 quarts (7.6-9.5 liters) for D-236/D-263, more for D-310 (verify in manual).
Hydraulic Fluid Type:
IH Hy-Tran fluid or equivalent (UTF - Universal Tractor Transmission Fluid).
Common Wear Items:
Clutch wear, hydraulic pump seals, injector pump timing, PTO clutch engagement, starter motor reliability.
Electrical Problems:
Wiring harness degradation, corroded connections, alternator/generator output issues.
Engine Considerations:
Turbocharger maintenance for DT variants, potential for cylinder liner wear and head gasket leaks on high-hour engines.
Grease Points:
Extensive lubrication requirements for steering components, PTO shaft, front axle pivots, and other moving parts.
Manufacturer:
International Harvester (IH), a prominent American manufacturer of agricultural and construction equipment.
Series Placement:
Part of the '66' series, succeeding models like the 706 and 766, and preceding later series like the 86 and 88 series.
Development Focus:
Designed as a versatile utility tractor for medium to large farms, offering increased power and advanced features for its time.
Production Years:
Approximately 1967-1971.
Manufacturing Location:
Primary manufacturing likely at IH's U.S. tractor plants (e.g., Farmall Works, Rock Island, Illinois).
