JLG 1500SJ Service Manual - Manual (Page 260)

SECTION 4 - BOOM & PLATFORM
4-14 – JLG Lift – 3121262
11. Remove the bolt and keeper pin securing the boom
lift cylinder rod pivot pin and drive out the pivot pin.
12. Lower the lift cylinder until it rests on the turntable.
13. Attach an adequate lifting device to support the rear
of the boom.
14. Remove the bolt and keeper pin securing the boom
pivot pin and remove the pivot pin. Remove the
boom from the machine and place it on adequate
supports.
Installation
1. Lift the boom from its supports.