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Home›Repair guides›Due to the wide variety of installations, it is not possible to provide specific procedures for removal.

Cummins Onan — Due to the wide variety of installations, it is not possible to provide specific procedures for removal.

For these Cummins Onan models: HGJAA, HGJAB, HGJAD, HGJAE.

Browse Cummins Onan generators & specs →

Procedure

  1. 4.4.2 Disconnecting the Generator Set Disconnect battery, wiring, exhaust and fuel connections as follows before removing the generator set.
  2. 1. Disconnect all battery cables, negative (-) cable first, at the battery terminals. WARNING 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.
  3. 2. Disconnect the negative (-) and positive (+) battery cables at the generator set.
  4. 3. Disconnect the wiring connectors for remote control and remote fuel pump (fuel injection models).
  5. 4. Disconnect the generator AC output wires and conduit from the junction box on the vehicle.
  6. 5. Disconnect the exhaust tail pipe.
  7. 6. Gasoline-fueled generator sets: a. Disconnect the fuel line(s) from the generator set.
  8. 4. Preparing for Service 7-2022 28 A035D011 (Issue 23) Copyright © 2022 Cummins Inc. b. Securely plug the end of the fuel line to prevent leakage or an accumulation of explosive gasoline vapor.
  9. 7. LPG-fueled generator sets: a. Close the fuel shutoff valve(s) at the LPG container(s). b. Move the vehicle outside and away from below-grade spaces where LPG could accumulate. c. 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). d. Disconnect the fuel line from the generator set. e. Plug the end of the hose to prevent fuel from escaping if someone inadvertently opens the shutoff valve(s) at the LPG container(s). WARNING Gasoline and LPG (liquefied petroleum gas) are flammable and explosive and can cause severe personal injury or death. • Do not smoke. • Keep flames, sparks, pilot lights, arc-producing and switching equipment, and all other sources of ignition away from the fuel tank and system, and areas sharing ventilation. Have an ABC fire extinguisher handy. WARNING LPG is flammable and explosive and can cause asphyxiation. NFPA 58, Section 1.6 requires all persons handling LPG to be trained in proper handling and operating procedures. LPG “sinks" and can accumulate in explosive concentrations. Before disconnecting the LPG fuel line, close the fuel shutoff valve(s) at the LPG container(s) and move the vehicle outside and away from pits, basements, and other below-grade spaces where LPG could accumulate.
  10. 4.4.3 Removing the Generator Set
  11. 1. Park the vehicle on a level surface.
  12. 2. Put the transmission in PARK.
  13. 3. Lock the brakes.
  14. 4. Remove the ignition key. Do not move the vehicle during this procedure. CAUTION The underside of the generator set can be damaged by protruding objects. Always rest the generator set on a flat surface that has been cleared off. Always extend the lifting arms of a forklift beyond the base of the generator set to prevent them from protruding into the underside cover.

Source: manual:A035D011_SERVICE_i23-HGJAA _HGJAB_ HGJAD_ HGJAE(Spec J-M)7-22.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.