JLG 1500SJ Service Manual - Manual (Page 259)

SECTION 4 - BOOM & PLATFORM
3121262 – JLG Lift – 4-13
6. Remove the cover from the rear of the boom and
disconnect the wiring harnesses and hoses running
from the turntable to the boom.
7. Disassemble the end of the turntable to boom pow-
ertrack from the turntable. Use a lifting device to pull
the powertrack up so the hydraulic hoses and wiring
harnesses can be pulled out from the turntable.
8. Using the Main Lift Crackpoint option under the Cali-
brations menu, lift the boom enough to access the
boom lift cylinder rod pivot pin.
NOTE: The boom assembly weighs approximately 10,800
lbs. (4,900 kg.).
9. Using an adequate lifting device, support the weight
of the boom.
10. 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 as possible.