TM 10-6640-239-13 4-99 4-41.    ANALYTICAL BALANCE AND VIBRATION DAMPING SUPPORT. This task consists of: a. Remove b. Install c. Calibrate INITIAL SET-UP Tools Required General Mechanics Tool Kit, (Appendix B, Section III, Item 1) Materials/Parts Required Lockwashers, (6) REMOVE 1. Remove Cover and Analytical Balance.  See Figure 4-36. a. Unsnap four retaining latches (1) and lift cover (2) clear of analytical balance (3). b. Remove analytical balance (3) from vibration damping support (4). 2. Remove Vibration Damping Support. a. Remove drawers K1 and K2. b. Remove six screws (5), washers (6), lockwashers (7), and nuts (8) attaching vibration damping support (4) to counter.  Discard lockwashers. c. From each retaining latch (1), remove four screws (9) and retaining latch. d. Remove 16 screws (10), washers (11), and nuts (12) and separate vibration damping support (4) from plate (13). INSTALL 1. Install Vibration Damping Support.  See Figure 4-36. a. Align plate (13) with vibration damping support (4) and secure with 16 screws (10), washers (11) and nuts (12). b. Align each retaining latch (1) to vibration damping support (4), and secure with four screws (9). c. Align vibration damping support (4) on countertop and secure with six screws (5), washers (6), and nuts (7). 2. Install Analytical Balance and Cover. a. Place analytical balance (3) on vibration damping support (4). CAUTION To prevent damage to equipment, ensure all doors are pulled forward. b. Pull doors on analytical balance (3) forward. c. Place cover (2) over analytical balance (3) and secure in place with four retaining latches (1). CALIBRATE Refer to vendor manual for analytical balance calibration procedures.