Komatsu PC138USLC Operation & Maintenance Manual page 129

DETAILED CONTROLS AND GAUGES
Lock Lever
When leaving the operator's compartment, set the lock lever securely to the LOCK position. If the lock lever is not at the LOCK
position and the control levers or control pedals are touched by mistake, it may lead to serious personal injury.
Check that the condition of the lever is as shown in the diagram.
When pulling the lock lever up, be careful not to touch the work equipment control lever.
When pushing the lock lever down, be careful not to touch the work equipment control lever.
This lever (1) is a device to lock the work equipment, swing, travel,
and attachment (if equipped) control levers.
(L) LOCK position: Even when levers or attachment control pedal
(if equipped) are operated, machine does not
move
(F) FREE position: Machine moves according to operation of
levers
equipped)
REMARK
This lock lever is of hydraulic lock type. Accordingly, when it is in the lock position (L), the control levers or control
pedals move but the machine does not move.
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or attachment control
WARNING
panel (if
OPERATION