JLG 1500SJ Service Manual - Manual (Page 155)

SECTION 3 - CHASSIS & TURNTABLE
3121262 – JLG Lift – 3-107
17. Using the Main Lift Crackpoint option under the Cali-
brations menu on the JLG Analyzer, lift the boom
enough to access the boom lift cylinder rod pivot
pin. Refer to Section 6 - JLG Control System for
additional analyzer instructions.
NOTE: The boom assembly weighs approximately 10,800
lbs. (4,900 kg.).
18. Using an adequate lifting device, support the weight
of the boom.
19. Attach a lifting device to support the weight of the
boom lift cylinder.
NOTE: To assist in determining when the lift cylinder is prop-
erly supported, use the JLG Analyzer and select
Diagnostics > Moment > Actual Moment and get a
reading as close to zero (0) as possible.
20. Remove the bolt and keeper pin securing the boom
lift cylinder rod pivot pin and drive out the pivot pin.
21. Lower the lift cylinder until it rests on the turntable.
22. Attach an adequate lifting device to support the pivot
end of the boom.
23. 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.