Komatsu PC1250-11, Original Instructions Manual

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ACTIONS IF PROXIMITY SWITCH HAS FAILED
k k
WARNING
Setting the lock lever automatic lock cancel switch to CANCEL position cancels the PPC (pilot pressure
control) lock constantly (the machine is operable) regardless of the hydraulically operated stairway po-
sition.
• Use this method for moving the machine temporarily to a safe place. After moving the machine to a
safe place, immediately ask your Komatsu distributor for repair.
• The machine may start moving and it is very dangerous. Before performing this method, be sure to
store the hydraulically operated stairway securely and hang the chain to prevent the stairway from
falling onto the hook on the machine.
STAIRWAY CAUTION LAMP
The stairway caution lamp warns that the hydraulically operat-
ed stairway is lowered.
PPC lock is applied this time. As a result, the swing operation,
travel, and work equipment operation cannot be performed.
When each device is stored, the lamp goes out and the PPC
lock is released.
For the storing method of the hydraulically operated stairway,
see “PROCEDURE FOR STORING STAIRWAY BY OPERAT-
ING FROM MACHINE”.
NOTICE
If the lamp does not go out even after the devices are stor-
ed, ask your Komatsu distributor for investigation of cause
and repair.
HANDLE THE HYDRAULICALLY OPERATED STAIRWAY ATTACHMENTS AND OPTIONS
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