Komatsu ecot3 Operation And Maintenance Manual page 368

ATTACHMENTS AND OPTIONS
Replace Additional Breaker Filter Element
Immediately after the engine is stopped, the parts or oil are at high
temperature and may cause burns. Wait for the temperature to go down
before starting the operation.
If compressed air is used, there is danger of dirt flying and causing
personal injury.
Always wear safety glasses, dust mask, and other protective
equipment.
NOTICE
For details of the replacement interval for the element, see "MAINTENANCE INTERVAL FOR HYDRAULIC BREAKER (PAGE 4-19)".
Prepare a container to catch the oil.
1. Lower the work equipment to the ground and stop the engine.
2. Turn the starting switch to the ON position (B), then set the lock
lever to the FREE position (F).
3. After carrying out Step 2, operate each work equipment control
lever and attachment control pedal fully to the front, rear, left,
and right 2 or 3 times within 15 seconds to release the internal
pressure in the hydraulic circuit.
WARNING
MACHINE READY FOR ATTACHMENT
6 - 11