Installation - JLG Lull 1044C-54 II Series Service Manual

Boom and Transfer

Installation

Boom Hoist Cylinder
6-14
WARNING: To avoid personal and/or equipment damage, support the
hydraulic cylinder before removing pins. Use suitable blocking
and lifting devices when removing heavy machine
components.
Note: Cylinder pins are designed to be removed with a slide hammer.
5. Remove lock pin from rod end pivot pin (Item 4).
6. Remove rod end hoist cylinder pin from outer boom (Item 3).
7. Slowly lower supported cylinder until it rests on main frame.
8. Loosen and remove capscrew (Item 12) and lockwasher (Item 11) from
base end lock pin (Item 9).
9. Remove lock pin from base end pivot pin (Item 10).
10. Remove base end hoist cylinder pin from transfer carriage/boom
cradle (Item 8).
11. Slowly remove the cylinder from the machine and take it to a location
suitable for inspection and disassembly.
(Ref. Fig. 6-8) The following steps are required to install boom hoist
cylinders.
1. Using sling(s), crane, or other suitable means, position base end of
cylinder (Item 2) in its proper location on the transfer carriage/boom
cradle (Item 8).
WARNING: To avoid personal and/or equipment damage, make sure the
cylinder is properly supported until it is completely installed.
Note: Be sure to apply thread locking compound to the threads of the capscrews
before installing them.
2. Align cylinder with pin bosses in transfer carriage/boom cradle and
install pivot pin (Item 10). Secure pivot pin with lock pin (Item 5),
lockwasher (Item 11), and capscrew (Item 12). Torque capscrew to
55 ft-lbs.
3. Place rod end of cylinder in its proper location and insert rod end pivot
pin (Item 4) to secure the cylinder to outer boom (Item 3).
4. Secure pivot pin with lock pin (Item 9), lockwasher (Item 7) and
capscrew (Item 6). Torque capscrew to 55 ft-lbs.
5. Clean hydraulic hose ends with solvent and reconnect them to fittings
on each hoist cylinder. Torque hose swivel nuts to 50–58 ft-lbs.
6. Lubricate grease fittings with EP lithium based grease.
31200079