TM 10-6640-238-13 4-108 3. Remove Manometer.  See Figure 4-40. WARNING Never handle mercury with bare hands; never heat mercury in an open container; and never shake more than 20 milliliters of mercury in a glass container. a. Close air supply valve (1) to manometer (2). b. Remove air line tubing (3) from manometer (2). c. Remove four screws (4), lockwashers (5) and washers (6) from each mount (7) and remove manometer (2).  Discard lockwashers. d. Remove four screws (8), washers (9), washers (10), lockwashers (11), nuts (12) and mounts (7) from manometer (2). Discard lockwashers. INSTALL 1. Install Manometer.  See Figure 4-40. a. Install four mounts (7) and secure each mount to manometer (2) using screw (8), washer (9), washer (10), lockwashers (11), and nut (12). b. Align each mount (7) with wall holes and secure with four screws (4), lockwashers (5), and washers (6). c. Connect air line tubing (3) to manometer (2). d. Open air supply valve (1) to manometer (2). 2.    Install RVP Test Bomb and Gauge.  See Figure 4-39. a.     Align RVP gauge (6) with RVP bomb (4) and tighten. b. Align RVP bomb (4) and liquid chamber (5) in bomb rack (2) and over air manifold. c.     Place RVP gauge handle (3) on support bracket (7). d. Tighten outer half of bomb rack (2) with two wing nut bolts (1). CALIBRATE Refer to vendor manual for manometer calibration procedures.