Komatsu PC290LC-11 Operation & Maintenance Manual page 278

MACHINE OPERATIONS AND CONTROLS
1.
Put right and left travel levers (1) in NEUTRAL position.
The machine stops.
2.
Turn fuel control dial (2) to Low idle (MIN) position and
lower the engine speed.
3.
Lower the bucket horizontally until the bottom touches the
ground.
4.
Set lock lever (3) in LOCK position (L).
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OPERATION