MAINTENANCE 4.8 EVERY 10 OPERATING HOURS OR DAILY 4.8.2 AIR CLEANER - CLEAN PRE-CLEANER Clean dust cups of pre-cleaners Legend for illust. Z 21770: (1) Roof mounted air cleaner units (2) Air intake screen (3) Clamps (4) Dust cups (5) Jet tubes 1. Provide suitable container for collecting the dust before open- ing the dust cups (4). 2. Loosen the clamps and swing down dust cups (4). 3. Remove dust from pre-cleaner dust cups. 4. Check condition of the dust cup gaskets and replace if neces- sary. 5. Swing back dust cups (4) to closed position and secure with the clamps provided. 6. Check air cleaner mounting parts for tight fit and security.
NOTICE When operating the machine under very dusty conditions, check pre-cleaner jet tubes (5) for plugging. Dust plugging of tubes can be removed with a stiff fiber brush. Never clean tubes with compressed air unless both the pri- mary and safety elements are installed in the air cleaner. Do not steam-cleam tubes. 327