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Cummins/Onan — Removal:

For these Cummins/Onan models: DJB, DJC.

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Procedure

  1. 2. Unscrew the intake cup from the pump.
  2. 3. Remove the crankshaft lock ring and gear-retaining

Source: manual:967-0463 Onan DJB DJC Engine Service and Parts Manual (12-1972).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.