Komatsu D61EX-24 Operation & Maintenance Manual page 261

MACHINE OPERATIONS AND CONTROLS
2.
To make counter-rotation turn to the left, tilt the joystick
(steering, directional and gear shift lever) forward and tilt it
to left (L), and tilt it fully further from the point where the
joystick operating effort becomes large.
The R.H. and L.H. tracks rotate in the opposite directions
to each other to make counter-rotation turn on that place.
REMARK
To make counter-rotation turn to the right, operate the joy-
stick (steering, directional and gear shift lever) to the right
in the same manner.
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OPERATION