Komatsu PC138US-11 Operation & Maintenance Manual page 165

OPERATION
Automatic lock function of lock lever
• The lock lever automatic lock function assists the operator in judgment to reduce damage caused
by accident. It does not stop the work equipment or machine in all situations.
• Even if the lock lever automatic lock function works, the work equipment or machine may not stop
immediately or may stop after moving by a certain distance. Also, the lock lever automatic lock
function may not work in the following cases. Accordingly, do not rely on it too much.
• When the hydraulic oil temperature is low (When the hydraulic oil temperature caution lamp in-
dicates low temperature)
• When the viscosity of the hydraulic oil used is higher than that of the genuine hydraulic oils
which Komatsu recommends
For the genuine hydraulic oils which Komatsu recommends, see "RECOMMENDED FUEL,
COOLANT, AND LUBRICANT (7-4)".
• When the system has a failure
• Before setting the lock lever to FREE position, make sure that all levers and pedals are set to NEU-
TRAL position. If any of them is out of NEUTRAL position, the work equipment or machine may
move suddenly and cause a serious personal injury or death.
The lock lever automatic lock function automatically sets the lock lever in the locked state to prevent the work
equipment or machine from operating continuously when the lock lever is released while the work equipment
control lever or travel lever is operated.
When this function works, the operations of the work equip-
ment, swing, travel, and attachment are locked automatically
and the message shown in the figure is displayed.
While this function is in operation, the machine does not move
even if a control lever or the attachment control switch is oper-
ated while the lock lever is in FREE position (F).
To cancel the lock, return the lock lever to LOCK position (L),
check that each control lever and the attachment switch are in
neutral, and then release the lock lever again.
WARNING
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WENAM00111
EXPLANATION OF COMPONENTS
3-95