Pfeiffer Balzers Oil Fluid Lubricant Felt Reservoir Removal Tool for Turbomolecular High Vacuum Pumps TPH/U 020, 040, 050, 060, 062, 065 and O71P. The lubricant reservoir should be replaced at least every three years and this tool makes it a breeze to do so. Where extreme operating conditions or unclean processes are involved, the replacement should occur more frequently. See AVAILABLE DOWNLOADS PDF below for replacing Oil Fluid Lubricant Reservoir.