Komatsu D155A-6 Operation & Maintenance Manual page 109

EXPLANATION OF COMPONENTS
WORK EQUIPMENT LOCK LEVER
When standing up from the operator's seat, always move the work
equipment lock lever securely to the LOCK position.
If the blade control and ripper control levers are not locked and are
touched by accident, it may lead to serious injury or damage.
If the work equipment lock lever is not completely in the LOCK position,
the lock may not be applied.
Check that it is in the position shown in the diagram.
When parking the machine or when performing maintenance, always
lower the blade or ripper to the ground, then set the work equipment
lock lever to the LOCK position.
Lever (6) is a device to lock the blade control and ripper control levers.
When it is set to the LOCK position, the TILT, RAISE, LOWER, and FLOAT operations are locked.
REMARK
When starting the engine, to ensure safety, always place the work equipment lock lever at the LOCK position.
If the work equipment lock lever is not at the LOCK position, the limit switch is actuated and the engine will not start.
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WARNING
OPERATION