Cummins/Onan WC4-10S-5 — Starting the Power Unit Electrically
Operation
For the Cummins/Onan WC4-10S-5, from the Cummins/Onan service manual.
Browse Cummins/Onan generators & specs →
Before you start
- Make no attempt to start the power unit until all preparation instructions have been complied with.
Procedure
- Check oil level with bayonet gauge; fill to FULL mark.
- Turn Automatic Voltage Regulator control rheostat to extreme counterclockwise position.
- See that the Two-Way Field Circuit Switch is in the Automatic position.
- Press START button firmly until the power unit starts, not more than 10 or 15 seconds; if it fails to start, wait 10 seconds and repeat.
- If it does not start after a few attempts, check fuel supply and ignition wires.
- Check oil pressure gauge immediately after starting; after warm-up it will be approximately 25 to 30 pounds.
- Turn the Automatic Voltage Regulator control rheostat slowly clockwise to increase output voltage to desired value.
- Allow the power unit to warm up until it operates smoothly, then connect the load.
- Adjust frequency with the INCREASE or DECREASE buttons of the frequency control switch.
Specs & values
- Oil pressure approximately 25 to 30 pounds at normal operating temperature
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.