Case IH 956 & 1056 XL Workshop Manual D-155 – DT-402 Engine Service

This 886-page factory publication provides the exact specification data needed to rebuild the IH D-series engine family. Tailored specifically for the Case IH 956 and 1056 XL tractor fleet, it details structural components, precision measurements, and critical system diagnostics.

Technical Scope & Features

• Covers 1987 Case IH 956 and 1056 XL tractor engines (including naturally aspirated and turbocharged D-155, D-179, D-206, D-239, D-246, D-268, D-310, D-358, DT-239, DT-358, and DT-402 models).
• 212 illustrated diagrams mapping out engine disassembly, timing gear alignment, fuel system diagnostics, and cylinder head component assembly.
• Instant download access. The fully searchable OCR text layer lets you jump straight to any torque spec or keyword.
• Original J.I. Case November 1987 documentation (Reference: DCN 8-59030).
• Shop-floor ready. Print individual sections as needed; page spreads stay perfectly legible at their original size.

Engine Service Documentation

The manual details the structural and mechanical backbone of the D-series diesel engines. Coverage includes the foundational cylinder block, cylinder head assembly, and valve lever mechanisms. Specialized sections document the crankshaft, connecting rod installation, and precision piston-to-sleeve measurements. It also outlines exact timing requirements for the injection pump, lubricating system, and water pump, all supported by exploded-view graphics.

Technical Specifications & Tolerances

Expect extensive tolerance charts, fluid capacities, and torque-load data. Cylinder head bolt torque values are mapped out in a multi-stage sequence to ensure proper sealing of the maintenance-free head gasket. The specification tables list the intake valve clearance at exactly 0.30 mm, while crankcase pressure and blow-by values cover the entire range from the 3-cylinder D-155 to the 6-cylinder DT-402.

The manual provides comprehensive timing gear train alignment and the specific static timing procedures required for VE-series injection pumps. Note that working with high-pressure fuel systems and heavy engine blocks carries inherent physical risks. Proper lifting equipment and strict adherence to standard shop safety protocols are essential before beginning any teardown or inspection.