JLG 1500SJ Service Manual - Manual (Page 280)

SECTION 4 - BOOM & PLATFORM
4-34 – JLG Lift – 3121262
44. Pull the fly boom extend cables out enough to have
clearance to remove the sheave, and remove the
retaining bolt, keeper pin, pin, bushings, and sheave
from the front of the outer mid boom section.
NOTE: When pulling the fly boom section out of the outer
mid boom section, make sure the fly boom retract
cables do not catch at the rear of the boom section.
45. Attach a lifting device to the fly boom section and
pull the section and fly boom extend cables from the
outer mid boom section. Secure the rear of the outer
mid boom section so it doesn’t move when the fly
boom section is withdrawn.