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STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
2. When arm and boom or bucket are operated at same time
Operation
•
When the arm and boom or bucket are operated
at the same time, the pilot pressure oil from the
travel shuttle valve pushes spool (1) of the arm
throttle valve to the right.
•
As a result, the pressure oil flowing from the rear
main pump to the arm Hi control valve is throt-
tled, and the arm speed is restricted to improve
the simultaneous operation performance.
10-82
CONTROL VALVE
PC600, 600LC-7
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