Service Manual Instruction Manual

SECTION 4 - BOOM & PLATFORM
4-66 – JLG Lift – 3121171
21. Disconnect the length sensor cables from the tower
boom fly section.
22. Tag and disconnect the electrical lines going to the
upper and lower tower boom length sensors.
23. Remove the bolts and washers securing the length sen-
sor mounting brackets and remove the sensors and
brackets as an assembly.
24. Tag and disconnect all the hydraulic hoses running to
the tower telescope cylinder. Cap or plug all openings.
25. Remove the bolts securing the trunnion keeper blocks
and shims and remove the blocks and shims.
26. Place blocking under the tower telescope cylinder to
prevent it from dropping suddenly and begin pulling
the cylinder out of the boom using an adequate lifting
device. Reposition the blocks and lifting straps as
needed to prevent the cylinder from dropping suddenly
and to keep it balanced.
NOTE: The tower telescope cylinder weighs approximately 915
lbs. (415 kg).
Installation
1. Place blocking for support under the tower telescope
cylinder and begin pushing the cylinder into the boom
using an adequate lifting device. Reposition the blocks
and lifting straps as needed to prevent the cylinder from
dropping and to keep it balanced.
NOTE: The tower telescope cylinder weighs approximately 915
lbs. (415 kg).
2. Position the telescope cylinder trunnions into place and
install the shims and trunnion keeper blocks. Apply Loc-
tite #242 to the retaining bolts and torque to 35 ft.lbs.
(47.5 Nm).
3. Connect all the hydraulic hoses running to the tower
telescope cylinder as tagged during removal.