. MAINTENANCE MAINTENANCE PROCEDURE (Bleed the air only when the oil inside the travel motor case has been drained.) 1) Run the engine at low idling, loosen air bleeder (1), and check that oil flows out. 4 - 42 3) After completing the air b 4) Run the engine at low idle , and slowly swing the upper structure at least 2 times unif ormly to the left and right. NOTICE If the air is not bled from the swing m 5. Bleeding air from travel moto 2) Run the engine at low idl e and swing the work equipment 90° to bring it to the side of the track. il the track is raised slightly from 3) Jack up the machine unt the ground. Rotate the tr Repeat this procedure on When rotating under no and reverse.
ack under no load for 2 minutes. both the left and right sides. load, move uniformly in forward 6. Bleeding air from attachment (when installed) I r f a breaker or other attachme nt has been installed, run the engine at low idle and oper ate the attachment peda epeatedly (approx. 10 times ) until the air has been bled from the attachment circuit. NOTICE If a specific attachment supplied b y a subcontractor has its own instructions for air bleeding, carr y out air bleeding following such instructions. p the engine. Wait for more than five minutes before starting a work. e oil in the hydraulic oil tank this way. any spilled oil. air bleeding, and refill with oil if not sufficient.
After completing air bleeding, sto p the engine. Wait for more than five minutes before starting a w Ai r bubbles will be purged from th e oil in the hydraulic oil tank this way. Check for oil leakage and wipe off Check the hydraulic oil level after air bleeding, and refill with oil if not