Komatsu D31E-20, D31P-20, D31PL-20, D31PLL-20, D31P-20A, D31S-20, D31Q-20, D37E-5, D37P-5A Shop Manual
Komatsu bulldozer shop manual for D31E, P, PL, PLL, S, Q and D37E, P series bulldozers. Covers maintenance, repair, and specifications.
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Sample pages from the Komatsu D31E-20, D31P-20, D31PL-20, D31PLL-20, D31P-20A, D31S-20, D31Q-20, D37E-5, D37P-5A Shop Manual manual
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Komatsu Models Covered & Key Technical Specifications
Models: D31E-20, D31P-20, D31PL-20, D31PLL-20, D31P-20A, D31S-20, D31Q-20, D37E-5, D37P-5A
Sub-models / Variants: E-series, P-series, PL-series, PLL-series, S-series, Q-series
Build Years: 1997
Serial Numbers: D31E-20 (42001–42714+), D31P-20 (45001–47617+), D31PL-20 (45001–47617+), D31PLL-20 (45001–47654+), D31P-20A (45001–47617+), D31S-20 (41001–42184+), D31Q-20 (41001–42184+), D37E-5 (3001–3731+), D37P-5A (3001–3661+)
Technical Data:
- Engine: Komatsu 6D95L-1 (D31 models), S4D102-1 (D37/D31 variants)
- Engine Type: 4-cycle, water-cooled, in-line vertical, direct injection
- Transmission: Hydroshift planetary gear type, 3-speed forward/reverse
- Max. Engine Power: 52.2 kW / 70 HP (D31), 59.6 kW / 79.9 HP (D37)
- Steering System: Dry-type, multiple-disc clutch with PPC actuation
- Operating Weight: 5,060 kg to 7,700 kg depending on model and configuration
- Hydraulic Pump: Gear type (SAL(2)-036 or SAR(2)-045 models)
- Max. Hydraulic Pressure: 17.2 MPa {175 kg/cm²}
- Coolant Capacity: 22 Liters
Komatsu Manual Features & Content Preview
Komatsu D31 and D37 Bulldozer Technical Documentation
- Covers 1997 Komatsu D31E, D31P, D31PL, D31PLL, D31S, D31Q, D37E, and D37P series bulldozers, including all 20-series and 5-series variants
- Original OEM publication SEBM001007, dated May 1997
- Features 671 pages of technical specifications, component logic, and factory workshop documentation structures
- Includes 12 electrical wiring diagrams and hydraulic system schematics
- Contains 40+ reference tables for standard tightening torques and lubrication capacities
- File downloads to your account within seconds of checkout
- Re-download the file any time, no expiration
- Full-text search finds any part number in seconds
- This official publication serves as the primary technical reference for the 1997 Komatsu D31/D37 range, documenting engine, drivetrain, and hydraulic assemblies for the complete series.
Component and System Logic
This 671-page shop manual provides a deep dive into the operational mechanics of Komatsu D31 and D37 dozers. The structure section details the power train architecture, covering the engine, damper, Hydroshift transmission, and steering clutch assemblies. Detailed functional explanations describe how the modulating valve, steering control, and work equipment hydraulics interact. Each subsection provides the necessary information for identifying component functions during the inspection of disassembled parts.
Technical Reference and Specification Highlights
Specifications are provided in extensive tables for every variant covered, including operating weights, blade capacities, and track configurations. Engine specifications list rated horsepower at 2,350 or 2,500 rpm for the 6D95L-1 and S4D102-1 engines. Torque values for standard metric bolts, split flange bolts, and O-ring boss connectors are cataloged for assembly reference. The transmission oil capacity for the D31 series is documented at 13–16 liters. Hydraulic system pressure is set at 17.2 MPa (175 kg/cm²) for the standard pump configurations. Final drive oil capacity for the D31E/S/Q models is listed at 9.5 liters in the lubricant table. This official 671-page shop manual covers the Komatsu D31 and D37 bulldozer range, providing critical technical data for the maintenance and service of the engine, powertrain, hydraulic, and undercarriage systems.
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