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Home›Repair guides›Cummins/Onan›Permanent Magnet (PMG) Removal

Cummins/Onan — Permanent Magnet (PMG) Removal

Repair & overhaul · Permanent magnet generator (PMG)

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

Applies to: Cummins/Onan DFAA, Cummins/Onan DFAB, Cummins/Onan DFAC, Cummins/Onan DFBF, Cummins/Onan DFCB, Cummins/Onan DFCC, Cummins/Onan DFCE, Cummins/Onan DFE

Before you start

  • The rotor assembly must not be dismantled, or the magnetic properties will be destroyed.

Procedure

  1. Disconnect the negative (-) battery cable to prevent accidental starting.
  2. HC4-7 Control Housing: Remove the control housing grille and access covers.
  3. Remove the three M5X12mm capscrews and lockwashers; remove PMG cover.
  4. Disconnect the PMG wiring harness connector.
  5. Remove the four bolts and clamps retaining the exciter stator housing.
  6. Tap the stator housing out of its spigot and remove carefully.
  7. Remove the hex head through-bolt and pull the complete rotor assembly out.

Full service-parts list: Cummins/Onan DFBF →, Cummins/Onan DFCC →, Cummins/Onan DFCE →, 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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