TM 10-3930-669-20 (i) Remove tube (49) from adapter (48) and elbow (50). (j) Remove two screws (51), cover plate (52), and clamp half (53). (k)   Remove tube (54) from 90°  adapter (55) and fitting (56). (l) Remove second clamp half (53), two stack bolts (57), safety plate (58), and third clamp half (53). (m) Remove tube (59) from fitting (60) and 90' adapter (61). (n)   Remove fourth clamp half (53) from mast (29). 17-41