Komatsu H75051, Operation & Maintenance Manual

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The multifunction mono-lever (1) is used to operate the boom
and bucket in the following manners.
METHOD FOR OPERATING BOOM
The multifunction mono-lever is used to operate the boom.
NOTICE
Do not use “FLOAT” position when lowering the bucket.
Use “FLOAT” for leveling work.
Position (a): RAISE
When the multifunction mono-lever is pulled further from the
“RAISE” position, the lever stops in that position.
When the remote boom positioner is enabled, the boom stops
at the preset position and the lever returns to “HOLD” position
at the same time.
The boom stops at the highest position and the lever returns to
“HOLD” position at the same time when the remote boom posi-
tioner is disabled.
Position (b): HOLD
The boom remains in the position where it was stopped.
Position (c): LOWER
Position (d): FLOAT
The boom moves freely under external force. When the multi-
function mono-lever is set at “FLOAT” position, the lever stops
in that position.
MACHINE OPERATIONS AND CONTROLS OPERATION
3-192