TM10-3930-660-34 16-12.1. INNER BOOM - REPLACE/REPAIR (Cont’d) 2.  REMOVE RETRACT CHAIN PULLEY (4). NOTE Record number of turns nut (5) is loosened in step 2a for use during installation. a.  Remove nut (5) and flatwasher (6) securing clevis (7).  Remove clevis (7) from outer boom (2). b.  Remove capscrew (8),  and lockwasher (9). Remove pin (10) and chain pulley (4) from intermediate boom (11).  Discard lockwasher (9). c.  Lift retract chain (12) through hole and over flange of intermediate boom (11).  This will allow retract chain (12) to fall freely when inner boom is removed. 3.  TAG AND DISCONNECT HOSES (13,  14, and 15), FROM LINES (16,  17 and 18). a.  Loosen four nuts (19) at tensioner (20) to relieve tension on hoses (13,  14,  and 15). b.  Tag and disconnect hoses (13,  14, and 15) from lines (16,  17,  and 18). c.  Close end of lines (16,  17,  and 18) with metal plugs. 4.  REMOVE FOUR BOOM ELECTRICAL CABLE CLAMP ASSEMBLIES (PARTS 21-24). a.  Remove two capscrews (21) and two lockwashers (22) securing spacer plate (23) and clamp halves (24). Discard lockwashers. b.  Repeat step 4a for all remaining electrical cable clamp assemblies under boom. 16-59