28. MACHINES READY FOR ATTACHMENTS 28.2.1 CONNECTING HYDRAULIC CIRCUIT When connecting the attachment, connect the circuit as follows. Remove blind plugs @ located on the end of the stop valve piping (2 places, left and right). Take care not to lose or damage the removed parts. 2. Connect attachment tubes @) supplied by the attachment manufac- turer to the end from which the plug was removed in step 1. 5-8 PC160/180/200-6k-ENG PATH OF OIL The direction of operation of the pedal and the path of the oil are as shown in the diagram below.