Attached is a pict of three samples that are being sent to Evan's Analytical Group for FTIR analysis. These come from three of the six roughing pumps that were reconditioned this past summer for eventual installation as standy "emergency" Beam Tube Roughing Pumps.  As part of their reconditioning, the original hydrocarbon-based lubricant initially used in these pumps was thoroughly removed, the wetted parts then cleaned or replaced and Fomblin (PFPE) lubricant substitued.  Typically, pourable Fomblin lubricant appears colorless and completely transparent.  The "cloudiness" of these samples is thought to be the result of the mixing of Fomblin grease used on the pump bearings during assembly with that of the pourable Fomblin oil which gets added to the reservoir upon final assembly.

 Note that the lubricant in the pump from which sample 3 was taken from appears colorless and transparent in the site glass but the extracted sample appears milky.