TM 10-6640-215-13 3-8.    REMOVE/INSTALL ANEROID BAROMETER. This task consists of: a. Removal b. Installation INITIAL SET-UP: Tools Required General Mechanics Tool Kit, (Appendix B, Section III, Item 2) Materials/Parts Required Lockwashers, (Appendix F) REMOVAL a. Loosen three retaining ring mounting screws and carefully remove from wall.  See figure 3-5. b. Loosen two retaining ring clamp screws. c. Separate barometer and mounting cushion from retaining ring. d. Separate barometer from mounting cushion and save cushion for installation. INSTALLATION a. Install mounting cushion on new barometer and insert into retaining ring. b. Tighten two retaining ring clamp screws until barometer is held securely in place. c. Mount unit in place on wall using three retaining ring mounting screws and lock washers. NOTE When  maintenance  is  required  for  equipment  that  is  portable  and  require  no permanent  mounting,  this  equipment  should  be  removed  from  its  storage  in  the Petroleum  Laboratory  and  handled,  packaged,  adjusted,  repaired  or  replaced  in accordance with their respective TMs listed in Appendix A. 3-24