Komatsu ecot3 WA430-6 Operation & Maintenance Manual page 196

OPERATION
BUCKET CONTROL LEVER
Position (a): TILT
When the bucket control lever is pulled further from
the TILT position, the lever is stopped in this position
until the bucket reaches the preset position of the
positioner, and the lever is returned to the HOLD
position.
Position (b): HOLD
The bucket is kept in the same position.
Position (c): DUMP
OPERATION
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