Komatsu ecot3 Operation And Maintenance Manual page 366

ATTACHMENTS AND OPTIONS
Hydraulic Circuit Connection
When connecting the attachment, connect the hydraulic circuit as follows.
1. Check that stop valve (1) is at LOCK position (b)
(a) FREE: Hydraulic oil flows (direction of arrow is parallel to
long direction of arm)
(b) LOCK: Hydraulic oil does not flow (direction of arrow is at
right angles to long direction of arm)
When setting the FREE or LOCK position of the stop valve rotor,
remove bolt (2), turn over plate (1), then turn the rotor. After
setting, install plate (1) again with bolt (2).
2. Remove plug (3) at the tip of the stop valve piping. (Left and
right, 2 places)
Be careful not to lose or damage the removed parts.
3. After removing plug (3), connect the attachment piping (4) is
provided by the attachment manufacturer.
For the mouthpiece size and accumulator add-on, the action to
take differs according to the attachment manufacturer, so
please consult your Komatsu distributor.
MACHINE READY FOR ATTACHMENT
6 - 9