Caterpillar
Caterpillar 3406B
3400 Series
Caterpillar 3406B discontinued legacy engine. Source-validated Caterpillar legacy industrial or marine engine model with ongoing parts and rebuild demand.
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- Manufacturer files
- No datasheet
- Last updated
- 2026-08-04
- Package route
- diesel generator sets
- Cylinders
- L6
- Displacement
- 14.6 L
- Rated Speed
- 1,500 RPM
Caterpillar 3406B generator set context
The Caterpillar 3406B 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 | Caterpillar |
| Model | 3406B |
| Series | 3400 Series |
| Configuration | L6, turbocharged diesel |
| Cylinders | 6 |
| Displacement | 14.6 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
| Country of Origin | United States |
Frequently asked questions
What fuel does the Caterpillar 3406B use?
The Caterpillar 3406B is a diesel generator-set engine.
What is the displacement and cylinder configuration of the 3406B?
The Caterpillar 3406B is an inline-6 (6-cylinder) engine with a displacement of 14.6 L.
Is the 3406B still in production?
No — the Caterpillar 3406B is discontinued. Its specifications and datasheets remain archived here for reference.