Komatsu D57S, WA320, WA380, WA420, PC300-5, and EG150BS-5 Diesel Engine Shop Manual (P/N SEBE6221-01)
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Komatsu Models Covered & Key Technical Specifications
Models: S6D108-1, SA6D108-1
Sub-models / Variants: D57S-1, D57S-1B, WA320-3, WA380-3, WA420-3, PC300-5, PC300HD-5, PC360LC-5, EG150BS-5, EG185B-L-1, Sugar cane harvester AUSTOFT, SA6D108-M-1
Model Years: 1998
Serial Numbers: Sugar cane harvester AUSTOFT (Engine No. 10001–10296, 10297 and up)
Technical Data:
- Engine Configuration: 6-cylinder diesel
- Displacement: 7.15 liters (7,150 cc)
- Firing Order: 1–5–3–6–2–4
- Fuel Injection Pump: Bosch PES-AD or Denso NB (EP-9) type
- Governor: Bosch or Denso RSV centrifugal, all-speed type
- Turbocharger Types: Garret TO4E, Schwitzer S2B
- Electrical System: 24V starting motor and alternator, 12V batteries in series
Komatsu Manual Features & Content Preview
- Details the S6D108-1 and SA6D108-1 diesel engine configurations for heavy equipment, including the D57S, WA320, WA380, WA420, PC300-5, and AUSTOFT sugar cane harvesters
- Official Komatsu publication SEBE6221-01 (September 1998)
- Contains 56 component diagrams, 5 engine performance curves, and 12 torque specification tables for quick reference on the bench
- Includes specific build data for EG150BS-5 industrial generators
Engine Architecture and Systems
Tearing down a Komatsu 108 Series engine requires accurate reference material. This manual thoroughly breaks down the mechanical architecture of the S6D108-1 and SA6D108-1 power plants. You get a direct look at the engine body, lubrication circuits, and fuel injection systems. The documentation covers the exact structure and function of the cylinder head, the main revolving assembly (crankshaft and pistons), and variations in the cooling system like inlet-control versus outlet-control thermostats. Whenever working on high-pressure fuel systems or heavy rotating assemblies, always observe the factory precautions outlined here to prevent injury or component damage. The text clearly details the mechanical governor, fuel injection nozzles, and electrical stop motor circuitry. This gives mechanics a reliable source for component identification and functional theory.
Technical Specification Preview
Accurate data is the backbone of any successful rebuild. Engine specifications are clearly mapped out for models ranging from the D57S-1 to the WA320-3. You will find torque values for major assembly joints outlined in both Nm and kgm units, alongside standard bolt tables and split-flange data. Need fluid capacities? The manual confirms the S6D108-1 coolant system holds exactly 58 liters in specific machine configurations. It also lays out precise operational parameters. For instance, the intake-control thermostat cracking temperature is set at 71 ± 2°C, and the turbocharger safety valve actuation pressure is specified at 147 ± 11 kPa. This technical data ensures technicians have the exact factory standards required for disassembly,
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