TM 10-3930-669-20 c.  Lower Mast Hose and Tube Replacement. (1) Removal. (a)   Remove hose (25) from elbow adapter (16). (b)   Remove two screws (26), cover plate (27), clamp half (28), hose (25), and other clamp half (28) from mast (29). (c)   Remove two nuts (30), washers (31), cover plate (32), two screws (33), clamp half (34), hose (25), other clamp half (34), and plate (35) from mast (29). (d)   Remove hose (25) from elbow (36). 17-39