Komatsu A31001, Руководство по эксплуатации и техническому обслуживанию

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The lock lever is a device to lock the work equipment, swing,
travel, and attachment control levers (if equipped).
(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 or attachment
control pedal (if equipped).
REMARK
This lock lever is of hydraulic lock type. The control levers or
control pedals move but the machine does not move when it is
in LOCK position (L).
Automatic lock function of lock lever
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WARNING
• 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
• Before setting the lock lever to FREE position, make sure that all control levers and pedals are set
to NEUTRAL 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 prevents the work equip-
ment or machine from operating unexpectedly when the lock
lever is released while the work equipment control lever or trav-
el lever is operated. The lock lever is set in the same state as
when locked automatically.
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.
For the genuine hydraulic oils which Komatsu recommends,
see the Operation and Maintenance Manual of standard ma-
chine.
OPERATION EXPLANATION OF COMPONENTS
3-19