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Home›Engines›Cummins/Onan C12D6T

Cummins/Onan C12D6T Engine Engine

The Cummins/Onan C12D6T is a 2.5 L 3-cylinder naturally aspirated engine. It powers generator sets from Cummins/Onan, including the C12D6.

Also known as: Cummins C12D6T

2.5 L
Displacement
3
Cylinders

Engine specifications

Displacement2.5 L
Cylinders3
AspirationNaturally aspirated

Generator sets powered by this engine

1
Cummins/Onan C12D6

Common problems

6
  • Under frequency shutdown 81 u
  • Over frequency shutdown/warning 81 o
  • Low AC voltage shutdown 27
  • High Current warning/shutdown 51
  • High AC voltage shutdown 59
  • Battery voltage warning
    Cause: Status of battery charging system (failure)

Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan C12D6T.

Common questions

What is the displacement of the Cummins/Onan C12D6T?

The Cummins/Onan C12D6T has a displacement of 2.5 liters with 3 cylinders.

Which generators use the Cummins/Onan C12D6T engine?

The Cummins/Onan C12D6T powers 1 generator set(s), including Cummins/Onan C12D6.

What is a common problem with the Cummins/Onan C12D6T engine?

A commonly reported issue on generators using the Cummins/Onan C12D6T is: Under frequency shutdown.