Cummins/Onan — Low Temperature Operation
Operation · Plant
From a Cummins/Onan operator's manual covering: 250DFT-57R8, 300DFT-4R8, 300DFT-4XR8, 300DFT-5DR8, 300DFT-6DR8, 300DFT-7XR8, 300DFT-9XR8. Check it applies to your exact model before use.
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Procedure
- Use correct SAE No. oil for temperature conditions. Change oil only when engine is warm.
- Use fresh fuel. Protect against moisture condensation.
- Keep fuel system clean, and batteries in well charged condition.
- Partially restrict cool air flow but use care to avoid overheating.
- Refer to Cummins manual for additional information.
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.