Cummins/Onan — Preparing a stored engine for service
Maintenance
From a Cummins/Onan operator's manual covering: 500 DFX-57R, 600 DFX-4R, 600 DFX-4XR, DFX 4R, DFX 4XR, DFX 57R, DFX 5DR, DFX 6DR, DFX 7XR, DFX 9XR. Check it applies to your exact model before use.
Applies to: Cummins/Onan 500 DFX-57R, Cummins/Onan 600 DFX-4R, Cummins/Onan 600 DFX-4XR, Cummins/Onan KT2300-G engine
Before you start
- Do not smoke while servicing batteries - explosive gases emitted
Procedure
- Clean accumulated dirt from exterior, remove covers, tape and wrappings
- Use suitable cleaner to remove rust preventive compound from unpainted surfaces
- Refill crankcase with clean lubricating oil; flush and fill cooling system
- Check coolant level, adjust or refill as necessary
- Connect batteries
- Verify no loads are connected to generator
- Perform prestart servicing and start engine
- Apply load to at least 50 percent of rated capacity
- Check all gauges read correctly
Full service-parts list: Cummins/Onan 500 DFX-57R →, Cummins/Onan 600 DFX-4R →, Cummins/Onan 600 DFX-4XR →
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.