Hyundai HCP9000, User Manual

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3.3 - Check the Air Filter
1. Loosen the knob and remove the air filter cover. Remove the air filter
element and observe for cleanliness.
2. Clean the air filter element with soap and water or solvent. Squeeze dry
and then soak in clean engine oil.
3. Squeeze out all excess oil and reinstall. Replace the element if it is
damaged.
Check the air filter using the maintenance schedule. Always inspect air filter
before using the generator. Clean Air Filter every 3 months or after 50hrs of
operation according Section 5.4: Air Filter Service procedure.