TM 10-3930-669-20 17-10.  MAIN HYDRAULIC SYSTEM HOSE AND TUBE REPLACEMENT (CONT). i.  Steer Hose and Tubes Replacement. (1) Removal. (a) Remove two tubes (79 and 80) from adapters (81 and 82). (b) Remove four screws (83), two cover plates (84), clamp halves (85), tubes (79 and 80), other clamp halves (85), and plate (86). (c) Remove two tubes (79 and 80) from fittings (87 and 88). (d) Remove two hoses (89 and 90) from elbows (91 and 92) and elbows (93 and 94). (2) Installation. (a) Install two hoses (89 and 90) on elbows (91 and 92) and elbows (93 and 94). (b) Install two tubes (79 and 80) on fittings (87 and 88). (c) Install plate (86), two clamp halves (85), tubes (79 and 80), other clamp halves (85), and cover plates (84) with four screws (83). (d) Install two tubes (79 and 80) on adapters (81 and 82). 17-66