28. MACHINES READY FOR ATTACHMENTS 28.1 GENERAL LOCATIONS 1. STOP VALVE This valve stops the flow of the hydraulic oil. FREE : Hydraulic oil flows. LOCK : Hydraulic oil stops. When removing or installing attachments, set this valve to the LOCK position. 2. SELECTOR VALVE This switches the flow of the hydraulic oil. Position : When breaker is used Position : When general attachment is used (crusher, etc.) PC130/150LPG-6K ENG 5-5