Lull 944E-42 Service Manual - Manual (Page 35)

3-5 944E-42
Boom
16. Label, disconnect and cap the attachment tilt hoses
at the fittings at the front of the third boom section.
Cap all fittings to keep dirt & debris from entering the
hydraulic system.
Note: If replacing the third boom section with a new
boom section; Remove the female coupler, male nipple
and bulkhead fittings from the bulkhead plate inside the
boom head.
Note: If the third boom section is equipped with remote
auxiliary hydraulic couplers, remove the couplers, tubes
and mounting plate from the boom head. Transfer the
couplers to the boom head of the new boom section.
17. Remove the capscrews holding the hose clamps to
their boom mounts at the rear of the third boom
section.
18. Use a suitable overhead lifting device and sling,
attach to the Extend/Retract cylinder trunnion (7).
Rotate and pull the cylinder out of the third boom
section far enough to give the attachment tilt and
auxiliary hydraulic hoses (8) enough room to be
pulled out of the boom.
19. Remove the attachment tilt and auxiliary hydraulic
hoses from the third boom section by pulling them
out from the top of the third boom section. Lay the
hoses behind the machine.
20. Completely remove the Extend/Retract cylinder.
Readjust the position of the sling as needed to help
balance the cylinder during withdraw. When the
cylinder is clear of the machine, carefully lower it to
the ground.
21. Remove the clevis pin (9) to disconnect the retract
chain yoke from the rear of the third boom section.
Lay the chain assembly flat behind the third boom
section.
22. Install a lifting eye to the nut on the attachment tilt
cylinder. Attach a suitable overhead lifting device
and sling to the lifting eye.
23. Remove the pin from the attachment tilt cylinder and
lower the cylinder to the ground.
24. Use a suitable overhead lifting device and sling
attached to the third boom section; remove slack
from the hoist sling, and withdraw the boom 6 ft.
(2 m).
25. Remove the bottom wear pads at the front of the
second boom section. Label each part for
installation.
26. Pull the third boom section straight out of the second
boom section. Reposition the slings as needed so
the third boom section balances when removed from
the second boom section. Set the boom section
down on a hard, level surface. Support the boom as
needed to prevent it from tipping over. MU0221
7
8
MU1211
9