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Atlas Copco QAX 12-20-30 Dd — Bad compression

For the Atlas Copco QAX 12-20-30 Dd.

Applies to: Atlas Copco QAX 12-20-30 Dd

Procedure

  1. Restriction in air filter/cleaner or induction system.
  2. Incorrect valve tip clearances.

Source: manual:QAX 12-20-30 Inst 2006 .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.