Komatsu PC78US-6 Operation & Maintenance Manual page 231

MAINTENANCE
°
NOTICE
If the attachment maker specifies an air bleeding procedure for the attachment itself, follow the specified procedure to bleed the
air.
NOTICE
After completing the air bleeding operation, stop the engine, and leave the machine for 5 minutes before starting operations.
This will remove the air bubbles in the oil inside the hydraulic cylinders.
Check that there is no leakage of oil and wipe off any oil that has been spilled.
MAINTENANCE PROCEDURE
4 - 47