JLG 1850SJ Service Manual - Manual (Page 92)

SECTION 4 - BOOM & PLATFORM
4-6 – JLG Lift – 3121619
4. Tag and disconnect all electrical lines from the limit
switches and generator that go to from the turntable to
the powertrack.
5. Elevate the boom enough to remove the upper lift cylin-
der pin. Use an overhead crane or similar lifting device
to support the weight of the boom.
6. Using an adequate lifting device, support the weight of
the lift cylinder and remove the lift cylinder pin. Lower
the lift cylinder down until it rests on the boom rest.
7. Use an overhead crane or similar lifting device to sup-
port the rear of the boom.
8. Remove the boom pivot pin.
9. Carefully lift the boom from the machine, taking care to
feed the hydraulic and electrical lines up alongside the
boom as it is raised.
Installation
1. Lift the boom almost into position.
2. Feed the hydraulic hoses and electrical lines down
alongside the hood.
3. Loosely connect the powertrack end. Remember to
tighten the bolts the rest of the way when installation is
complete.
4. Lower the boom into position and install the boom
pivot pin.