TM10-3930-660-34 16-12.BOOM ASSEMBLY - REPLACE (Cont’d) c. Secure    boom    pivot    pin    (16)    to    vehicle    frame    with capscrew (17) and new locknut (18). d. Repeat steps lb and lc for other pivot pin (16). 2. PLACE     JACKSTAND     OR     SUPPORT     ON     FRONT     OF VEHICLE DECK.ADJUST SUPPORT SO BOOM ASSEMBLY (8) IS LEVEL WHEN LOWERED. 3. CAREFULLY  LOWER  BOOM  ASSEMBLY  (8)  WITH  HOIST AND SLING UNTIL FRONT OF OUTER BOOM SECTION IS ON JACKSTAND OR SUPPORT. 4. SECURE  HYDRAULIC  HOSES  (3)  TO  BOTTOM  OF  BOOM ASSEMBLY  WITH  NEW  LOCKNUTS  (a),  CAPSCREWS  (b), AND CLAMP HALVES (c). 5. CONNECT ROD ENDS OF BOOM  HOIST  CYLINDERS  (12) TO BOOM ASSEMBLY (8). a. Reposition slings to front of outer boom section. b. Lift  boom  assembly  (8)  until  cylinder  pivot  pin  holes  of boom assembly (8) are just above cab. c. Lift  boom  hoist  cylinders  (12)  into  position  and  support cylinders. CAUTION Use  hoist  and  sling  to  make  final  alignment  with cylinder  rod  eye  and  pivot  pin  hole.    Do  not  use the  joystick  to  make  final  alignment;  damage  to rod eye bushing could result. NOTE One boom hoist cylinder (12) will begin to extend before the other.  Install this cylinder first.  Second cylinder  will  begin  to  extend  after  first  cylinder  is connected. 16-54