TM 10-3930-669-20 17-10.  MAIN HYDRAULIC SYSTEM HOSE AND TUBE REPLACEMENT (CONT). b.  Pivot Arm Hose and Tube Replacement. (1) Removal. (a)   Remove tube (15) from elbow adapter (16) and manifold (11). (b)   Remove four screws (17), two cover plates (18), two clamp halves (19), two hoses (20 and 21), and other two clamp halves (19) from pivot arm bracket (22). (c)   Remove hose (20) from flow restrictor (23) and manifold (11). (d)   Remove hose (21) from flow restrictor (24) and manifold (11). (2) Installation. (a)   Install hose (21) on manifold (11) and flow restrictor (24). (b)   Install hose (20) on manifold (11) and flow restrictor (23). (c)   Install two clamp halves (19), hoses (20 and 21), other two clamp halves (19), and two cover plates (16) on pivot arm bracket (22) with four screws (17). (d)   Install tube (15) on elbow adapter (16) and manifold (11). 17-38