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Cummins/Onan — Disconnecting the Generator Set

For these Cummins/Onan models: QG7000i DF Generator Set for RV, RV Generator Set.

Applies to: Cummins Onan Qg7000I Df Generator Set For Rv, Cummins Onan Rv Generator Set

Before you start

  • Arcing at battery terminals or light switch or other equipment or flames and sparks can ignite battery gas causing severe personal injury
  • Ventilate battery area before working on or near battery
  • Wear safety glasses
  • Do not smoke
  • Switch trouble light ON/OFF away from battery
  • Do not disconnect battery cables while the generator set is running or the vehicle battery charging system is on
  • Always disconnect the negative (-) cable first and reconnect it last
  • Gasoline and LPG (liquefied petroleum gas) are flammable and explosive and can cause severe personal injury or death

Procedure

  1. Disconnect all battery cables, negative (-) cable first, at the battery terminals.
  2. Disconnect the negative (-) and positive (+) battery cables at the generator set.
  3. Disconnect the wiring connectors for remote control.
  4. Disconnect the generator AC output wires and conduit from the junction box on the vehicle.
  5. Disconnect the exhaust tail pipe.
  6. Gasoline-fueled: Disconnect the fuel line(s) from the generator set. Securely plug the end of the fuel line to prevent leakage or an accumulation of explosive gasoline vapor.
  7. LPG-fueled: Close the fuel shutoff valve(s) at the LPG container(s). Move the vehicle outside and away from below-grade spaces where LPG could accumulate. To purge most of the LPG from the fuel line and generator set, run the generator set (if it starts) until it runs out of fuel (LPG container valve closed). Disconnect the fuel line from the generator set. Plug the end of the hose to prevent fuel from escaping if someone inadvertently opens the shutoff valve(s) at the LPG container(s).

Specs & torque values

  • Battery cables
  • Wiring connectors
  • Fuel lines
  • Exhaust tail pipe

Source: manual:onan-rv-generator-service-manual-hglca-a.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.