Since we removed the cartridge from BSC2, I took the opportunity to try to remove a spring that had galled when we first installed the BS & ISI stack for Advanced LIGO. I initially tried coaxing the preload nut on the end of the spring free with alcohol and a couple of long wrenches, but eventually that wasn't enough. With Randy's help, we pulled the two cap pieces off the end of the HEPI house spring tube and lifted the cap, load cell and spring out. This spring was taken to the high bay where Randy used a porta-band to cut the galled nut off, allowing us to retrieve the other hardware off the spring. Was suprised to hear Randy say the kind of dull looking blade on the portaband had no difficulty with steel cap on the spring.

A spare spring from LLO has been installed in it's place, torqued to the crossbeam foot, the old load cell and hardware have been added above.

I didn't get any photos of the work really, but here's a shot of the de-galling method we used.