OTC Tools OTC 7239 A/C Spring Lock Coupler 3/4". OTC Tools. Same as Ford No. T85-19623-A. These tools provide the only means of separating spring lock air conditioning refrigerant pressure lines on 1981 -current Ford vehicles, and 1994 and newer Chrysler and Jeep vehicles. They are spring-loaded in the closed position to deflect any spray that occurs when the line is disconnected. Email for product availability.