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Home›Repair guides›Cummins/Onan›Checking Engine Oil Level

Cummins/Onan 5MDKAU — Checking Engine Oil Level

Maintenance

For the Cummins/Onan 5MDKAU, from the Cummins/Onan service manual.

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Before you start

  • Crankcase pressure can blow hot engine oil out the fill opening causing severe burns

Procedure

  1. Stop the genset before removing the oil fill plug.
  2. Pull the plug and dipstick out of the oil fill neck.
  3. Wipe dipstick, thread it back into the fill neck and seat the plug.
  4. Remove plug and dipstick again and check oil level on dipstick.
  5. Add or drain oil, keeping level between the high and low beads.
  6. Secure the oil fill plug.

Specs & values

  • A full quart (0.9 liter) can be added if oil level is at the lower bead

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.

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