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Home›Repair guides›Centrifugal Pump Disassembly

Cummins/Onan MJA, MJB, MJC — Centrifugal Pump Disassembly

For the Cummins/Onan MJA, MJB, MJC.

Applies to: Cummins Onan Mjc

Procedure

  1. Remove the water inlet from the pump and remove the 6 screws holding the end cover to the pump.
  2. Unscrew the impeller from the shaft counterclockwise when facing the impeller.
  3. Remove the pump body by unscrewing the single capscrew that clamps the pump body to the pedestal.
  4. Remove the retaining ring and drive the bearing assembly out of the pedestal.
  5. To remove the water seal, drive it out of the pump body.

Source: manual:968-0500 Onan MJA MJB MJC Service Manual (10-1964).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.