JLG 1850SJ Service Manual - Manual (Page 134)

SECTION 4 - BOOM & PLATFORM
4-48 – JLG Lift – 3121619
4.9 JIB
Removal
1. Lower the platform to the ground or onto blocking to
support the weight of the jib.
2. Tag and disconnect the electrical harnesses that run to
the jib. If necessary, loosen the guide block to allow the
harnesses and hoses to move more freely.
3. Remove the jib valve protection plate.
4. Have a container or absorption material ready to catch
residual hydraulic fluid. Tag and disconnect the hydrau-
lic hoses that run from the boom to the jib control valve.
It may be necessary to disconnect additional lines to
gain access to certain fittings. Cap or plug all openings.
5. Unbolt the valve from the boom.
6. Lay the jib control valve aside on the jib. Secure it in
place so it does not fall.
7. Disconnect the jib protractor sensor linkage from the
boom.
8. Remove the bolt and keeper pin securing the jib level
pivot pin and remove the pin. Place blocking under the
cylinder rod or a soft material under the cylinder rod to
protect the rod from being scratched.
NOTE: The jib and platform assembly weighs approximately 2100
lbs. (953 kg.).