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Cummins/Onan HDZAA — Service Procedure

For the Cummins/Onan HDZAA.

Applies to: Cummins Onan Hdzaa

Procedure

  1. Check for and remove blockages in the cooling
  2. Apply standard derates for elevation and tem-
  3. The oil temperature switch is normally open
  4. Verify that the rise over ambient does not ex-
  5. If engine appears to be cooling properly, re-
  6. f there is a short to ground when the generator
  7. Check wiring for shorts to ground and repair as
  8. If the low oil pressure and high oil temperature

Source: manual:983-0502 Onan HDZAA (spec A-B) Diesel Genset Service manual (06-2010).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.