Komatsu PC58UU-3, Руководство по ремонту

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STRUCTURE, FUNCTION AND MAINTENANCE STANDARD ELECTRICAL SYSTEM
10-126
PC58UU-3
12
AUTOMATIC HEIGHT STOP SYSTEM
• Automatic height stop function is capable of
stopping movement of the boom when it
reaches the predetermined height during
operation.
• These functions are helpful in ensuring work
safety and efficiency when working in job
sites where obstacles such as electric wires
are present.
1. Height setup function [height mode]
• You can stop movement of the boom during
operation at any height (A) you have previ-
ously set.
• You can limit the height of the work equip-
ment by setting the limit on the boom lift
height.
• This function reduces speed of the boom
prior to the forced stop to minimize resulting
shocks or impacts.
★
Note that this function is not usable for limit-
ing the bucket height.
[Setup procedures]
• Shift the mode select switch to the "Height".
• Lift the boom up to the height where you
want to set the limit.
• Turn the setup switch to the "SET" position to
make sure that the buzzer is sounded two
times and the indicator lamp comes on.
[Operation]
• When the above setting is complete, lower
the boom once. Now, whenever the boom
reaches the specified height during operation,
its movement will be stopped there.
• This stop is caused by reducing and then
shutting down the output pressure from the
PPC valve to the boom operation valve (UP
side) at the EPC valve.
A: Setup position
B: Setup angle
C: Operation possible zone
D: Operation impossible zone
• Shift the mode switch to the “Height”.
• Turn the setup switch to the “CLEAR” posi-
tion, then make sure that the indicator lamp is
turned off.
(5)