International
International D-312
IH 400 Series Diesel
International D-312 discontinued legacy engine. Source-validated International Harvester legacy diesel from Case IH parts catalogs and engine service references, retained for tractor, power-unit, and parts-search demand.
Overhaul & repair parts- Manufacturer files
- 1 datasheet
- Last updated
- 2026-08-04
- Package route
- diesel generator sets
- Cylinders
- L6
- Displacement
- 5.1 L
- Rated Speed
- 1,500 RPM
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International D-312 overhaul & repair parts
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International D-312 generator set context
The International D-312 is listed here as a diesel generator-drive engine for 50 Hz generator sets. Use this page to compare the published engine output, electrical kWe/kVA ratings, emissions level, datasheet availability, and neighboring models before specifying an alternator, controller, enclosure, voltage, and compliance package.
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Technical Specifications
| Brand | International |
| Model | D-312 |
| Series | IH 400 Series Diesel |
| Configuration | L6, naturally aspirated diesel |
| Cylinders | 6 |
| Displacement | 5.1 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
| Country of Origin | United States |
| Year Introduced | 1972 |
| Year Discontinued | 1980 |
Frequently asked questions
What fuel does the International D-312 use?
The International D-312 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the D-312?
The International D-312 is an inline-6 (6-cylinder) engine with a displacement of 5.1 L.
Is the D-312 still in production?
No — the International D-312 is discontinued (production ended around 1980). Its specifications and datasheets remain archived here for reference.
Are reference documents available for the D-312?
This page links reference documents for the International D-312. Check each document's title, model coverage, revision and rating conditions before using it for selection.