Spacewalker Mike Fincke installed two radiator grapple bar stowage beams on the S1 segment of the station’s truss. The beams will be used to store handles that would be necessary if a radiator ever needed to be replaced.
Meanwhile, astronaut Drew Feustel conducted work on the Special Purpose Dexterous Manipulator, or Dextre. Inside the space station, astronauts Greg Johnson and Cady Coleman manipulated the station’s robotic arm to deliver Dextre to Feustel. He then installed a cover on one of the robot’s cameras and lubricated the snares that allow the robot to grab equipment.
Both spacewalkers now are headed back to the P3 solar alpha rotary joint to apply another layer of lubricant. Flight controllers on the ground in Houston have rotated the solar alpha rotary joint 200 degrees to spread the first layer of grease. If Feustel and Fincke have time, they also will replace covers 16, 13 and 9 before making their way back to the Quest airlock.