Cummins/Onan — Returning the Generator Set to Operation
Operation
From a Cummins/Onan operator's manual covering: 2.0 EGHAM, 2.5 EGHAA, 3.5 EGHEM, 4.0 EGHAB, 4.0 EGHEB, 5.0 EGHAB, 5.0 EGHEB, 5.0 EGHEM, 6.0 EGHEB. Check it applies to your exact model before use.
Applies to: Cummins/Onan 2.5 EGHAA, Cummins/Onan 4.0 EGHAB, Cummins/Onan 5.0 EGHAB, Cummins/Onan 5.0 EGHEB, Cummins/Onan 6.0 EGHEB, Cummins/Onan Elite E140H engine, Cummins/Onan GH170 engine
Before you start
- Battery electrolyte can cause severe eye damage and burns to the skin.
- Batteries present the hazard of explosion.
Procedure
- Perform an inspection of the generator set.
- Check the tag on the set to verify oil viscosity is still correct for the existing ambient temperature.
- Electric start models: clean and check the battery; measure specific gravity (1.260 at 80 F [27 C]) and verify level to the split ring.
- Check the condition of the air filter and check the engine oil level.
- Open the fuel supply valve.
- Start the generator set; initial start-up may be slow due to oil in the cylinder.
- Apply 50 percent load until the set runs smoothly; run for an hour.
- Remove the load and let the set run three to five minutes to cool down.
Specs & values
- Specific gravity 1.260 at 80 F (27 C)
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.