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Home›Repair guides›Cummins/Onan›Main Stator and Rotor Removal

Cummins/Onan — Main Stator and Rotor Removal

Repair & overhaul · Main stator / rotor

From a Cummins/Onan service manual — check it applies to your exact model before use.

Applies to: Cummins/Onan DFE

Before you start

  • Do not use fan blade to bar over engine. That can damage blades and cause property damage and personal injury.
  • Use adequate lifting devices to support heavy components. Keep hands and feet clear while lifting.
  • Do not allow rotor assembly to hang on engine flywheel.
  • Improper stator assembly rigging and handling can result in damage to stator and rotor assemblies.

Procedure

  1. Remove the PMG.
  2. Remove the lower back panel, two lower front panels and upper access panels of the control housing assembly.
  3. Remove the air inlet and discharge panels of the generator.
  4. Crank or bar the engine/generator to position a full pole face at the bottom of the main stator core.
  5. Disconnect all load wires from the reconnection terminal block assembly (or circuit breaker option).
  6. Disconnect the remote control wiring and conduit from the control housing.
  7. Disconnect engine harness connectors (INLINE A, B, C) and DC power connector (INLINE F).
  8. Mark and disconnect the wires to the CT's.
  9. Use a hoist to support the control housing assembly.
  10. Loosen fasteners securing control housing side and bottom panels to generator.
  11. Remove control housing fasteners and remove the control housing assembly from the generator.
  12. Remove the four bolts retaining the bearing cartridge housing in the endbracket.
  13. Remove the eight bolts holding the endbracket to the generator housing.
  14. Remove the M20 fastener from the two generator mounting feet brackets.
  15. Lift generator at lifting eyes; remove fasteners securing drive discs to flywheel and remove assemblies.

Tools required

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Specs & values

  • Generator (dependent on model type) can weigh up to 3,745 pounds (1685 kgs)

Full service-parts list: Cummins/Onan DFE →

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.

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