Purpose:
To provide detailed service and repair information for Case IH 1255 and 1455 tractors, catering to both DIY users and professional mechanics.
Value Proposition:
An inexpensive method to maintain and repair Case IH 1255/1455 tractors, offering a significant cost saving compared to professional service, with the benefit of in-depth understanding of the machine.
Content Style:
Step-by-step instructions, hundreds of photos and illustrations, notes, cautions, and warnings for critical information.
Organizational Structure:
Numbered table of contents for fast navigation, logically organized chapters covering distinct vehicle systems.
Engine:
Basic Engine Overhaul, Performance Tuning, Component Replacement
Fuel System:
Fuel injection, Carburetion (if applicable), Diesel injection systems, Turbocharger systems, Fuel pump, Fuel filter replacement, Fuel line troubleshooting
Electrical Equipment:
Starting system, Charging system, Ignition system, Lighting, Wiring diagrams, Component testing, Troubleshooting electrical faults
Control Center:
Dashboard instruments, Controls, Operator station, HVAC systems (if equipped), Hydraulics control (if integrated into control center)
Chassis:
Frame, Axles, Suspension, Steering system, Braking system, Wheels and tires
Hydraulics:
Hydraulic pump, control valves, cylinders, PTO (Power Take-Off) system, hitch control, auxiliary hydraulic outlets, hydraulic fluid system diagnostics.
Power Take Off Pto:
PTO engagement, clutch, and operation for 540/1000 RPM (if applicable).
Steering System:
Power steering pump, steering cylinder, steering linkage, troubleshooting steering issues.
Braking System:
Brake pedal operation, hydraulic system, brake actuation, bleeding procedures, brake shoe/disc inspection and replacement.
Front Axle Steering:
Service procedures for front axle components, differential (if applicable), steering knuckles, tie rods, and power steering assist systems.
Rear Axle Differential:
Service and maintenance of the rear axle housing, differential, and final drives, including lubrication and potential repairs.
Maintenance:
Scheduled maintenance, Fluid changes, Filter replacements, Lubrication points, Pre-operation checks
Repair:
Component disassembly, Reassembly, Component testing, Calibration, Replacement procedures
Troubleshooting:
Diagnostic charts, Symptom-based troubleshooting, Electrical system diagnosis, Mechanical system diagnosis
Engine Overhaul:
Complete engine teardown, inspection of internal components (pistons, rings, bearings, cylinder head, valves), crankshaft and camshaft measurements, rebuilding procedures.
Transmission Overhaul:
Gearbox disassembly, inspection of gears, shafts, bearings, synchronizers, and clutches (for power shift). Reassembly and adjustment procedures.
Electrical Diagnostics:
Detailed wiring diagrams, component testing procedures using multimeters, troubleshooting of starting, charging, lighting, and instrument panel issues.
Fuel System Service:
Fuel filter replacement, bleeding the fuel system, testing injector pump timing and output, injector testing and replacement, turbocharger inspection and servicing.
Timing Settings:
Precise procedures for setting engine timing, injection pump timing, and valve lash (if applicable) to ensure optimal engine performance and longevity.
Depth:
Comprehensive disassembly and reassembly procedures, detailed component diagnostics, torque specifications, clearance measurements, repair specifications
Illustrations:
Hundreds of photos and illustrations, including detailed drawings and enlarged insets, are provided to visually guide users through disassembly, reassembly, and component identification.
Engine Family:
Case IH 4-cylinder and 6-cylinder diesel engines (specific models would be detailed in the manual, likely DT-354/DT-360 for 1255 and DT-402/DT-466 for 1455, or equivalent International Harvester/Cummins derivatives).
Horsepower Range:
Estimated 70-110 HP range (1255 likely lower end, 1455 higher end - exact figures found in manual).
Torque Range:
Not specified, but generally proportional to HP for diesel tractor engines of this era.
Injection System:
Likely rotary or inline injection pumps (e.g., Bosch, CAV) depending on specific engine variant.
Turbocharger:
Present on some higher-horsepower variants of the 1255 and standard on the 1455, significantly boosting power and efficiency. Manual details inspection, servicing, and potential replacement of turbocharger components.
Engine Oil Change:
Typically every 250-500 hours, or annually, depending on operating conditions and oil specification (specific interval in manual).
Air Filter Replacement:
As needed based on operating environment (indicated by filter restriction indicator or regular inspection), often recommended at 250-500 hours.
Engine Oil:
API CG-4 or CD rated diesel engine oil, SAE 15W-40 recommended for most operating temperatures (verify exact viscosity and spec in manual).
Hydraulic Fluid:
Hy-Trans Fluid or equivalent universal tractor transmission oil (UTTO), meeting specific Case IH specifications (e.g., MS-1209). Fluid capacity varies by transmission and hydraulic system configuration (refer to manual for exact capacities and part numbers).
Coolant:
Ethylene glycol-based antifreeze mixture, typically 50/50 with distilled water, meeting specific diesel engine coolant specifications (refer to manual for type and capacity).
Transmission Oil:
Hy-Trans fluid or equivalent UTTO, with specific viscosity and performance ratings required for durability and smooth operation of the transmission and hydraulic systems.
Common Wear Items:
Clutch wear, hydraulic pump output degradation, injector pump issues, electrical connector corrosion, PTO clutch wear.
Troubleshooting Focus:
The manual's comprehensive troubleshooting section is crucial for diagnosing common and uncommon issues across all systems.
Manufacturer Origin:
Case IH, a brand with a long history in agricultural machinery, originating from J.I. Case Company, later merging with International Harvester's agricultural division.
Development Context:
The 1255 and 1455 models were part of Case IH's mid-range tractor lineup, designed for a variety of agricultural tasks, built upon the legacy of International Harvester's reliable tractor designs.
International Harvester Link:
These models often share lineage and components with earlier International Harvester tractor lines, representing a continuation and refinement of existing robust designs.
Production Period:
Likely produced in the 1980s and early 1990s, following the formation of Case IH.
