Cummins/Onan — Prestart Preparation Checklist
Installation · generator set
From a Cummins/Onan service manual covering: 400 DFEB, 450 DFEC, 500 DFFB. Check it applies to your exact model before use.
Applies to: Cummins/Onan 500 DFFB, Cummins/Onan KTA19-G2 engine, Cummins/Onan KTA19-G3 engine, Cummins/Onan KTTA19-G2 engine
Procedure
- Check ventilation and exhaust systems.
- Check all mechanical connections.
- Fill the coolant, lubrication and fuel systems.
- Prime the lubrication and fuel systems.
- Check the fuel system for leaks.
- Check the lubrication system for leaks.
- Verify all electrical connections are secure and wiring is complete.
- Check load cables are properly connected to transfer switch or circuit breaker panel.
Specs & values
- Exhaust pipes must have at least 12 inches (305 mm) clearance from combustible materials
Full service-parts list: Cummins/Onan 500 DFFB →
Source: Cummins/Onan service 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.