Part of the Case Repair Manuals.
This 641-page Case IH Workshop Manual covers the 1255 and 1455 tractors. You get full wiring diagrams for the generator, alternator and starting motor circuits, plus hydraulic schematics covering the XL Control Centre's range, speed shift, and draft/position control linkages. There's a full troubleshooting section for the injection pump and starter systems, and page after page of teardown procedures from the crankshaft and pistons through the chassis and brakes. Set nozzle opening pressure at 15 MPa for VA/CR pumps, and torque the dual clutch to 810-890 daN on the 1255 XL. No more chasing electrical gremlins with a test light and a guess. Bookmarked by section so you can jump straight from engine to fuel system to chassis without scrolling.
What's Inside This Case IH 1255 – 1455XL Series Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction and Specifications | Service Diagnosis, Specifications, Longitudinal and Cross Section | |
| Basic Engine | Valve Lever Assembly, Camshaft and Idler Gear, Cylinder Head Valves and Guides, Manifolds, Crankshaft, Pistons Cylinder Sleeves and Connecting Rods, Balancer, Flywheel, Timing Gear Train, Valve Lash Adjustment, Engine Testing | |
| Lubrication and Cooling | Lubricating System, Oil Pump, Water Pump, Thermostat and Coolant Manifold, Fan and V-Belts | |
| Fuel System and Turbochargers | Injection Pump EP/VA-VE, Injection Nozzle Holder, Turbocharger | |
| Electric Equipment | Generators DC, Alternators, Troubleshooting, Starting Motor, Instruments | |
| Xl Control Centre | Range and Speed Shift Linkage, Speed Reducer Shift Linkage, Transmission Control | |
| Chassis | Wheels, Axles and Propeller Shaft, Brakes, Clutches, Steering, Hydraulics, Cab |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| DT-402 (1255, 1455) | ||
| Static Timing (Degrees BTDC) | 16 | p. 14 |
| 1255, 1455 | ||
| Nozzle opening pressure for checking excess fuel for starting (VA...CR pumps) | 15 MPa (2133 PSI) | p. 118 |
| 1255 XL | ||
| Dual Clutch Apply pressure | 810-890 daN | p. 599 |
| 1455 XL | ||
| Dual Clutch Apply pressure | 870-920 daN | p. 599 |
| All Models | ||
| Spool edge protrusion (Limit Stop Mechanism) | 6.5 mm | p. 529 |
| Rocker arms play (Limit Stop Mechanism) | 2-10 mm | p. 529 |
| Engine Valve Lash (engine hot) | 0.30 mm | p. 13 |
| Minimum Engine Oil Pressure (new, 90-100 °C oil temperature) | 0.30 MPa (44 PSI) | p. 13 |
| Cylinder Head Thickness (new) | 98.81 mm (3.8902 inch) | p. 29 |
| B-Fam. (743XL, 745XL, 844XL) | ||
| Pilot stream pressure at pressure oil filter, oil temperature + 50 °C, low idle speed | 300-500 kPa | p. 487 |
| C-Fam. (955XL, 1055XL) | ||
| Pilot stream pressure at pressure oil filter, oil temperature + 50 °C, low idle speed | 500-700 kPa | p. 487 |
| DT-402 | ||
| Max. Crankcase Pressure (DT-402, High idle, No Load, 2500 RPM) | 165 mm H2O (6.5 in H2O) | p. 15 |
Case IH 1255 – 1455XL Series Common Problems This Manual Covers
Case IH 1255 engine stalls repeatedly under load during plowing, hard to restart
Work through the Engine Service Diagnosis chart on first. Pull the injection pump timing and reset static timing to 16 degrees BTDC per page 14 on DT-402 engines. Drain any contaminated diesel from the tank and lines, replace the fuel filter, and bleed air from the system before cranking again.
Manual Section: Engine Service DiagnosisHydraulic lift loses pressure and won't raise implements after 30 minutes of running
Check pilot stream pressure at the pressure oil filter with oil at 50°C and the engine at low idle, per page 487. On 743XL, 745XL, and 844XL models this should read 300-500 kPa; if it's dropping below spec, the pump or control valve is worn and needs pulling for inspection. Check the hydraulic schematic to trace the circuit before disassembly.
Manual Section: Xl Control Centre p. 487Transmission won't shift into high gear no matter how hard you push the lever
Inspect the range and speed shift linkage covered on . Check the control levers clearance to the slot ends of the console; it should sit at 8-10 mm per page 639. If the linkage is out of adjustment or binding, reset the clevis and retighten the jam nuts before road testing in every gear.
Manual Section: Chassis Linkage Adjustments p. 639Clutch slips under load or won't fully engage when the pedal releases
Check the dual clutch troubleshooting steps on . Measure release stroke, it should read 8-11 mm, and verify disk thickness against the 9.6-10.4 mm new spec. On 1255 XL units confirm apply pressure hits 810-890 daN per page 599; if the disk measures near the 15 mm wear limit on page 606, pull the assembly and replace it.
Manual Section: Clutch Troubleshooting (Turbo & Dual) p. 599Alternator won't charge and the warning light stays on at idle
Follow the Trouble Shooting G1 and K1 Alternators procedure on pages 438-462. Check belt tension and torque the alternator pulley nut to 3.5-4.5 daNm (25-32.5 lbs. ft.) per page 438. Test output at the B+ terminal with the engine at fast idle; if voltage stays low, pull the alternator for diode and brush inspection.
Manual Section: Alternator and Regulator Troubleshooting p. 438Frequently Asked Questions
What are the torque specifications for engine bolts on Case IH 1255XL?
For cylinder-head cap screws with a collar, the final tightening torque is 14-15 daNm (101-109 lbf-ft). For flywheel bolts, the final torque is 14-15 daNm (103-110 lbf-ft). These specifications are found under 'Special Nut and Bolt Torque Data'. p. 16
What is the specified final torque for cylinder-head cap screws with a collar on Case IH engines?
For cylinder-head cap screws with a collar, the final tightening torque is 14-15 daNm (101-109 lbf-ft). This is a critical specification for engine assembly and is applied in a three-step tightening procedure. p. 16
What is the recommended valve clearance for a hot engine?
The valve clearance for a hot engine should be set to 0.30 mm (0.012 inch). This specification is crucial for proper engine operation and is listed under the basic engine specifications. p. 13
What is the specified backlash for the crankshaft pinion and idler gear in the oil pump?
The backlash between the crankshaft pinion and the idler gear (10) should be maintained between 0.15-0.38 mm (0.006-0.015 inch). This is a key specification for the proper functioning of the oil pump. p. 83
What format is this Case IH 1255 & variants manual in?
Instant PDF download. You get the full 641-page searchable Workshop Manual immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Am I able to print pages from this Case IH 1255 & variants manual?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
Does this Case IH 1255 & variants manual include wiring diagrams?
Yes, full electrical schematics are included with wire colors, connector locations, and circuit descriptions.
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