1986-2005 Komatsu D31A-17 / D31E-17 / D31P-17 / D31PL-17 / D31PLL-17 / D31P-17A / D31P-17B Shop Manual

Technical Scope and Operational Data for the Komatsu D31A-17 Series

• Covers 1986–2005 Komatsu D31A-17, D31E-17, D31P-17, D31PL-17, D31PLL-17, D31P-17A, and D31P-17B bulldozers with 4D105-5 engines and Hydroshift transmissions
• Official Komatsu shop manual publication S/N 32001 and up, reference code SEBM0114C04
• Contains 404 pages of technical documentation including exploded-view mechanical drawings, hydraulic system schematics, and standard torque tables
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• The standard torque table lists specifications for various bolt thread diameters ranging from 6 mm to 39 mm
• This reference file provides the primary build and assembly data for the D31–17 generation of machinery, defining the specifications for engine-to-transmission coupling and undercarriage system maintenance

Component Structure and System Function

The Komatsu D31-17 documentation details the structure and function of the primary bulldozer assemblies, including the engine, power train, undercarriage, hydraulic systems, and electrical circuits. The engine section covers the radiator, cooling systems, fuel injection components, and power take-off (PTO) arrangements. Power train sections explore the unique Hydroshift transmission, detailing clutch group functions for forward, neutral, and reverse travel, alongside steering clutch and bevel gear integration. The manual serves as an authoritative resource for identifying parts assemblies and understanding the operational relationships between major mechanical sub-systems.

Specification Previews and Calibration Data

Technical data within the documentation defines the standards for machine testing and adjustment. The 4D105-5 engine compression pressure is listed at a minimum of 32 kg/cm² at 270–350 rpm, with valve clearances specified as 0.25 mm for intake and 0.45 mm for exhaust on units with serial numbers 150000 and up. Transmission case oil requirements are documented at 17.5 liters for general maintenance. The steering control valves and inching system pressures are defined to assist with diagnostic verification during system calibration. All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. This 404-page shop manual provides the essential technical reference for the 1986–2005 Komatsu D31A-17, D31E-17, D31P-17, D31PL-17, D31PLL-17, D31P-17A, and D31P-17B bulldozer series, covering system structure, testing protocols, and assembly specifications for the 32001 and up serial range.