Yuchai
Yuchai YC6TD840-D31
6TD
The Yuchai YC6TD840-D31 is a 19.598-litre inline-6 diesel engine for generator sets, rated at 688 kVA / 550 kWe standby power at 1,500 RPM (50 Hz). It is a liquid-cooled engine built in China.
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- Manufacturer files
- 1 datasheet
- Last updated
- 2026-05-29
- Package route
- diesel generator sets
- Standby Power · 50 Hz
- 688 kVA
- Electrical Output
- 550 kWe
- Cylinders
- L6
- Displacement
- 19.598 L
- Rated Speed
- 1,500 / 1,800 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
50 Hz1500 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 555.6 | 500 | 625 |
| Standby Power | 611.1 | 550 | 687.5 |
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 555.6 | 500 | 625 |
| Standby Power | 611.1 | 550 | 687.5 |
Yuchai YC6TD840-D31 generator set context
The Yuchai YC6TD840-D31 is listed here as a diesel generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 688 kVA / 550 kWe / 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.
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Technical Specifications
| Brand | Yuchai |
| Model | YC6TD840-D31 |
| Series | 6TD |
| Configuration | L6 |
| Cylinders | 6 |
| Displacement | 19.598 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | China National Stage III / Unregulated |
| Country of Origin | China |
Frequently asked questions
What is the power output of the Yuchai YC6TD840-D31?
The Yuchai YC6TD840-D31 is rated at 688 kVA standby / 625 kVA prime at 50 Hz (1,500 rpm); and 688 kVA standby / 625 kVA prime at 60 Hz (1,800 rpm).
Does the YC6TD840-D31 run at 50 Hz or 60 Hz?
The Yuchai YC6TD840-D31 is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the Yuchai YC6TD840-D31 use?
The Yuchai YC6TD840-D31 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the YC6TD840-D31?
The Yuchai YC6TD840-D31 is an inline-6 (6-cylinder) engine with a displacement of 19.598 L.
Is the Yuchai YC6TD840-D31 still in production?
Yes — the Yuchai YC6TD840-D31 is a current production model.
Is a datasheet available for the YC6TD840-D31?
Yes — an official Yuchai datasheet for the Yuchai YC6TD840-D31 can be downloaded from this page.