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Cummins/Onan HDZAA — Service Procedure

For the Cummins/Onan HDZAA.

Applies to: Cummins Onan Hdzaa

Procedure

  1. Check Oil level and refill as necessary.
  2. The oil pressure switch is normally closed
  3. If the oil pressure switch is opening, verify the
  4. If the switch does not open, one of 3 conditions

Specs & torque values

  • sure is 36 psi at 3000 RPM. With the engine
  • (closes between 2.5 and 3.6 psi). Normal pres-

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.