#2 guide pump coupler and line. EE notified MSHA at 9:40 am, evacuation started at 9:40 am and was complete at 10:05 am. The hoist was repaired at 2:00 pm and the miners went underground at 2:05 pm. The joist was tested before being put back into service. To prevent a reoccurrence the coupler was replaced, replaced fitting and electrical motor.