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Cummins/Onan — Service Procedure

A Cummins/Onan service procedure — check it applies to your exact model before use.

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Procedure

  1. Coolant Inlet
  2. Pump Impeller
  3. Coolant Flow Past

Source: manual:CONTENTS-Cummins-B-Series-Troubleshooting-Repair-3666087-588pages.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.