TM 10-6640-239-13 4-138 4-60.    GAS CYLINDER STORAGE CABINET. This task consists of: a. Remove b. Install INITIAL SET-UP Tools Required General Mechanics Tool Kit, (Appendix B, Section III, Item 1) Portable Electric Drill, (Appendix B, Section III, Item 2) Twist Drill Set, (Appendix B, Section III, Item 2) Hand Blind Riveter, (Appendix B, Section III, Item 3) Equipment Condition Gas Cylinders and Gas Regulators Valves Removed (Paragraph 4-49) Gas Cylinder Rack Removed (Paragraph 4-58) Materials/Parts Required Lockwashers, (13) Rivets, (68) REMOVE Remove Gas Cylinder Storage Cabinet.  See Figure 4-54. a. Disconnect nitrogen (1) and oxygen (2) lines. b. Remove seven screws (3), lockwashers (4) 13 rivets (5) and top inside panel (6).  Discard lockwashers. c. Remove 13 rivets (7) and bottom inside panel (8). d. Remove 20 rivets (9) and back panel (10). e. Remove 11 rivets (11) and left inside panel (12). f. Remove 11 rivets (13) and right inside panel (14). g. Remove two screws (15), lockwashers (16), and washers (17).  Discard lockwashers. h. Remove four screws (18), lockwashers (19), washers (20) and cabinet (21).  Discard lockwashers. INSTALL Install Gas Cylinder Rack.  See Figure 4-54. a. Install cabinet (21) and secure to streetside wall with four screws (18), lockwashers (19), and washers (20). b. Install two screws (15), lockwashers (16), and washers (17) securing cabinet (21) to floor. c. Install right inside panel (14) and secure with 11 rivets (13). d. Install left inside panel (12) and secure with 11 rivets (11). e. Install back panel (10) and secure with 20 rivets (9). f. Install bottom inside panel (8) and secure with 13 rivets (7). g. Install top inside panel (6) and secure with 13 rivets (5), seven screws (3) and lockwashers (4). h. Connect nitrogen (1) and oxygen (2) lines. i. Install Gas Cylinder Rack.  (Paragraph 4-59) j. Install Gas Cylinders and Gas Regulators Valves.  (Paragraph 4-50)