Cummins/Onan — Setting Time Delays
Adjustments · Time delay relays
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Procedure
- Amperite time delays are non-adjustable; used for delay on generator set starting, preheat of diesel glow plugs and delay on stopping the generator set after retransfer.
- To adjust the Agastat delay relay, turn its knob clockwise to increase delay, counterclockwise to decrease the delay.
- For synchronous motor-driven time delay, turn the knob in the center of the dial counterclockwise to increase the delay; it can be changed with power on or off.
Specs & values
- Starting (Agastat) 1.5 to 15 sec.; 1 sec. to 5 min.
- Starting (Amperite) 1.5 to 4.5 sec. (fixed)
- Preheat (Agastat) 5 to 50 sec.; Preheat (Amperite) 20 sec. (fixed), 1 min. (fixed)
- Transfer (Agastat) 5 to 50 sec.
- Retransfer (Motor Timer) 2 to 60 min.
- Stopping (Motor Timer) 2 to 60 min.; Stopping (Amperite) 2 min. (fixed)
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.