. ATTACHMENTS AND OPTIONS MACHINE READY FOR ATTACHMENT been 6 - 15 Hydraulic Circuit Connection When connecting the attachmen t, connect the hydraulic circuit as follows 1. Remove blind plug (1) at the end of the sto p valve piping (Two spo ts on the left an d right) Be caref to los removed 2. Connect maker to the p art f rom which the plug was r emoved Step 1 For the mouthpiec e size and accumulator a dd-on, the action to t attachment manufacturer, so pleas e consult your Komatsu distributor.