Cummins/Onan DL3 — Fuel Solenoid Checkout
Testing & diagnosis · Fuel solenoid K1
For the Cummins/Onan DL3, from the Cummins/Onan service manual.
Applies to: Cummins/Onan L Series Diesel engine
Before you start
- Ignition of fuel can cause serious personal injury or death by fire or explosion; no flame, cigarette or other igniter near the fuel system.
Procedure
- Fuel solenoid is located in the governor control cover on top of the fuel injection pump.
- Listen for solenoid actuation when B+ is applied (start switch in Start position).
- If there is no click when B+ is applied and again when removed, the fuel solenoid must be replaced.
- See Fuel System section of L Series Diesel Engine Service Manual (934-0750) for replacement procedure.
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.