Cummins/Onan — Coolant Pump - Replace / Rebuild
Repair & overhaul
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan MDKAV, Cummins/Onan MDKAW, Cummins/Onan MDKAZ, Cummins/Onan MDKB
Procedure
- Disconnect and connect battery cables, engine wiring harness, fuel lines, exhaust hose, coolant hoses
- Drain and refill engine fluids
- Remove and install soundshield as needed
- Remove and install pump drive belt and coolant pump
- Remove and install impeller, seal assembly, shaft assembly
- Remove and install pulley flange and pump gasket
- Inspect pump housing
- Adjust belt tension
- Test run unit
Specs & values
- Adjust belt tension
Full service-parts list: Cummins/Onan MDKAV →, Cummins/Onan MDKAW →, Cummins/Onan MDKAZ →, Cummins/Onan MDKB →
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.