Komatsu PC500LC-10R Shop Manual page 368

Hydraulic excavator
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COMPONENT PARTS OF TRAVEL SYSTEM
10 STRUCTURE AND FUNCTION
FUNCTION OF CENTER SWIVEL JOINT
Center swivel joint sends the oil from main pump installed to the the upper structure to travel motor installed to
the lower structure while rotating. Center swivel joint would not be twisted unlike hoses or tubes which would be
twisted if they are installed, for the upper structure rotating relative to the lower structure.
10-274
PC500LC-10R

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