Cummins/Onan 4.0 MCCK / 6.5 MCCK — Break-in Procedure

Operation · Engine

For the Cummins/Onan 4.0 MCCK / 6.5 MCCK, from the Cummins/Onan operator's manual.

Applies to: Cummins/Onan MCCK engine

Procedure

1. Run one half hour at half load.
2. Run one half hour at three quarter load.
3. Run at full load.

Source: Cummins/Onan operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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