Cummins/Onan 4.0 MCCK / 6.5 MCCK — Returning Unit to Service
Maintenance · Generating set
For the Cummins/Onan 4.0 MCCK / 6.5 MCCK, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan MCCK engine
Before you start
- Do not smoke while servicing batteries. Explosive gases are emitted from batteries in operation.
Procedure
- Remove cover and all protective wrapping; remove plug from exhaust outlet.
- Check tag on oil base and verify oil viscosity is still correct for existing ambient temperature.
- Clean and check battery; measure specific gravity and verify level to split ring; charge/add distilled water if required.
- Open fuel line.
- Connect batteries.
- Check coolant level and add as required.
- Verify that no loads are connected to the generator.
- Start engine.
- Check sea water pump operation.
- Apply load to at least 50 percent of rated capacity.
- Check all gauges for proper reading.
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.