The Cummins/Onan 6BTA 5.9-G3 is a 5.88 L 6-cylinder turbocharged engine rated at 1800 rpm, producing up to 140 kW. It powers generator sets from Cummins/Onan, including the C135 D6 and DGDK. It holds 100 L (26.4 gal) of oil and 9.9 L (2.6 gal) of coolant.
Also known as: Cummins 6BTA 5.9-G3
| Oil capacity | 100.0 L |
|---|---|
| Coolant capacity | 9.9 L |
| Displacement | 5.88 L |
| Cylinders | 6 |
| Aspiration | Turbocharged |
| Rated speed | 1800 rpm |
| Gross power | 140 kW |
Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan 6BTA 5.9-G3.
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Normal duty air filter. | — | find | ||
| Fuel filter | Oil and fuel filter fitted, water separator. | — | find | ||
| Oil filter | Oil and fuel filter fitted, water separator. | — | find | ||
| Coolant | Coolant capacity (only engine) | 9.9 l | — | ||
| Oil | Lubrication system oil capacity | 16.4 l | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
The Cummins/Onan 6BTA 5.9-G3 engine has an oil capacity of 100.0 liters.
The Cummins/Onan 6BTA 5.9-G3 has a displacement of 5.88 liters with 6 cylinders.
The Cummins/Onan 6BTA 5.9-G3 powers 2 generator set(s), including Cummins/Onan C135 D6, Cummins/Onan DGDK.
A commonly reported issue on generators using the Cummins/Onan 6BTA 5.9-G3 is: Over Current.