Caterpillar
Caterpillar D400 GC Legacy Genset
GC Diesel Generator Sets
Caterpillar D400 GC Legacy Genset discontinued/non-current GC diesel generator set. Cat links the exact D400 GC spec sheet from the D350 GC Non-Current source page. The official LEHE2009-08 Cat GC spec sheet validates the 400 ekW standby rating.
Chat on WhatsApp about this engine
Opens WhatsApp with Caterpillar D400 GC Legacy Genset and this page link filled in.
- Manufacturer files
- 1 datasheet
- Last updated
- 2026-08-11
- Package route
- diesel generator sets
- Electrical Output
- 400 kW
- Cylinders
- L6
- Displacement
- 12.5 L
- Rated Speed
- 1,500 RPM
Caterpillar D400 GC Legacy Genset generator set context
The Caterpillar D400 GC Legacy Genset is listed here as a diesel generator-drive engine for 50 Hz generator sets, with a headline 400 kW / standby rating. 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.
Also searched as
Technical Specifications
| Brand | Caterpillar |
| Model | D400 GC Legacy Genset |
| Series | GC Diesel Generator Sets |
| Configuration | C13 inline-6 four-cycle diesel generator-set engine |
| Cylinders | 6 |
| Displacement | 12.5 L |
| Compression Ratio | 16.3:1 |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | EPA Tier 3 stationary emergency application |
| Certifications | Official Caterpillar GC spec sheet, Caterpillar Non-Current GC page document link |
| Country of Origin | United States |
Frequently asked questions
What fuel does the Caterpillar D400 GC Legacy Genset use?
The Caterpillar D400 GC Legacy Genset is a diesel generator-set engine.
What is the displacement and cylinder configuration of the D400 GC Legacy Genset?
The Caterpillar D400 GC Legacy Genset is an inline-6 (6-cylinder) engine with a displacement of 12.5 L.
What emissions standard does the D400 GC Legacy Genset meet?
The Caterpillar D400 GC Legacy Genset is certified to EPA Tier 3 stationary emergency application emissions standards.
Is the D400 GC Legacy Genset still in production?
No — the Caterpillar D400 GC Legacy Genset is discontinued. Its specifications and datasheets remain archived here for reference.
Is a datasheet available for the D400 GC Legacy Genset?
Yes — an official Caterpillar datasheet for the Caterpillar D400 GC Legacy Genset can be downloaded from this page.