Cummins/Onan — Engine Torque Adjustment
Adjustments · PowerCommand control
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DFHA, Cummins/Onan DFHB, Cummins/Onan DFHC, Cummins/Onan DFHD, Cummins/Onan QST30 engine
Before you start
- Calibration and adjustment must be performed by technically qualified personnel only
Procedure
- Select >> from the Main Menu to proceed to the Torque Adjust %DC menu.
- Start the generator set and allow it to reach normal operating speed.
- Load the generator set to maximum rated kVA at rated voltage.
- Adjust the torque limit up or down to achieve proper frequency under maximum load.
- Select SAVE to retain the adjustment.
Tools required
- Calibrated instruments Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Adjustable 0% to +1% of duty cycle units (about 0% to +2% engine horsepower)
Full service-parts list: Cummins/Onan DFHA →, Cummins/Onan DFHB →, Cummins/Onan DFHC →, Cummins/Onan DFHD →
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.