Komatsu ecot3 Operation And Maintenance Manual page 135

DETAILED CONTROLS AND GAUGES
Work Equipment Control Lever
Left work equipment control lever (3) is used to operate the arm
and upper structure.
Arm operation
(a) Arm OUT
(b) Arm IN
Swing operation
(c) Swing to right
(d) Swing to left
N (Neutral): The upper structure and arm are held in position and
do not move.
Right work equipment control lever (4) is used to operate the boom
and bucket.
Boom operation
(a) RAISE
(b) LOWER
Bucket operation
(c) DUMP
(d) CURL
N (Neutral): The boom and bucket are held in position and do not
move.
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OPERATION