Cummins/Onan D6T Engine
The Cummins/Onan D6T is a 2.5 L naturally aspirated engine. It powers generator sets from Cummins/Onan, including the C12 D6.
Also known as: Cummins D6T
Engine specifications
| Displacement | 2.5 L |
|---|
| Aspiration | naturally aspirated |
|---|
Common problems
15- Undervoltage sensor pickup and dropout adjustable from 85-100% and 75-98%
Fix: Dropout adjustable delay from 0.1-30 sec. - Under frequency shutdown 81 u
- Time delay start and stop (cooldown) configurable for time delay of 0-300 seconds prior to starting after receiving a remote start signal
Fix: Control provides retransfer time delays including time delay emergency to normal (0-1800 sec), programmed transition delay (0-600 sec), and time delay engine cooldown (0-3600 sec). - Time delay of 0-600 seconds prior to shutdown after signal to stop in normal operation modes
Fix: Default for both time delay periods is 0 seconds. - Sensor failure indication
Fix: Logic is provided on the base control to detect analog sensor or interconnecting wiring failures. - Overvoltage sensor dropout adjustable from 105-135% of nominal
Fix: Dropout adjustable delay from 0.5-120 sec. - Over/under frequency sensor underfrequency sensing pickup and dropout adjustable from 85-100% and 70-85%
Fix: Dropout adjustable delay from 0.1-15 sec. - Over/under frequency sensor overfrequency sensing dropout adjustable from 105-115% of nominal
Fix: Dropout adjustable delay from 0.1-15 sec. - Over frequency shutdown/warning 81 o
- Low lube oil pressure warning/shutdown
Fix: Level is pre-set to match the capabilities of the engine used. Control includes time delays to prevent nuisance shutdown signals. - Low coolant temperature warning
Fix: Indicates that engine temperature may not be high enough for 1 min. and start or proper load acceptance. - Low AC voltage shutdown 27
- High Current warning/shutdown 51
- High coolant temperature warning/shutdown
Fix: Level is pre-set to match the capabilities of the engine used. Control includes time delays to prevent nuisance shutdown signals. - High AC voltage shutdown 59
Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan D6T.
Common questions
What is the displacement of the Cummins/Onan D6T?
The Cummins/Onan D6T has a displacement of 2.5 liters.
Which generators use the Cummins/Onan D6T engine?
The Cummins/Onan D6T powers 1 generator set(s), including Cummins/Onan C12 D6.
What is a common problem with the Cummins/Onan D6T engine?
A commonly reported issue on generators using the Cummins/Onan D6T is: Undervoltage sensor pickup and dropout adjustable from 85-100% and 75-98%. Fix: Dropout adjustable delay from 0.1-30 sec..