Cummins/Onan — Governed Speed Adjustment
Adjustments · Cummins model EFC electric governor
From a Cummins/Onan operator's manual covering: KTA51, KTA52, KTA53, KTA54, KTT52. Check it applies to your exact model before use.
Applies to: Cummins/Onan DFLA, Cummins/Onan DFLB, Cummins/Onan DFLC, Cummins/Onan DFM, Cummins/Onan KTT52
Procedure
- For 60 Hz full load, set engine no-load governed speed to 60.0 Hz (1800 RPM) isochronous, 61.8 Hz (1854 RPM) for 3% droop, or 63.0 Hz (1890 RPM) for 5% droop.
- For 50 Hz full load, set engine no-load governed speed to 50.0 Hz (1500 RPM) isochronous, 51.5 Hz (1545 RPM) for 3% droop, or 52.5 Hz (1575 RPM) for 5% droop.
- Use the SPEED ADJUST potentiometer on the engine instrument panel for fine speed adjustments of less than ±100 RPM.
Specs & values
- 60 Hz: 1800 / 1854 / 1890 RPM
- 50 Hz: 1500 / 1545 / 1575 RPM
- Fine adjustment less than ±100 RPM
Full service-parts list: Cummins/Onan DFLB →, Cummins/Onan DFLC →, Cummins/Onan KTT52 →
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.