24. SERVICE PROCEDURE 6. Bleeding air from attachment (if installed). For machines equipped with attachments such as the breaker, actuate the attachment pedal about 10 times to bleed the air completely from the attachment circuit while running the engine at low idling. NOTE If the attachment bleeding procedure is specified by the manufacturer, bleed the attachment according to such procedure. 7. Operation 1. After completion of bleeding the air, stop the engine, and wait for at least 5 minutes before starting operations. In this way, the air bubbles are removed from the oil inside the hydraulic tank. 2. Check for any leakage of oil, and wipe off any oil that has been spilled. PC450-ENG 3-78