Position the cylinder barrel in place and secure
Lubricate and install the boom pivot shaft.
with the bolts and washers. Torque the bolts to 250
Secure in place with the retaining pin, clip pin, and
lbs-ft (338.9 Nm). Remove the blocking under the
10. Position the retraction sheave on the mid
section and install the retaining pin. Secure the pin in
Block the boom before doing any work
place with the mounting plate, bolts, and washers.
under the boom.
Torque the bolts to 28 lbs-ft (37.9 Nm). Route the
retraction cable around the retraction sheave.
Block the boom in place.
11. Install the lower wear pads and the upper wear
Attach a suitable lifting device to the lift
pads and spring assembly to the mid section.
12. Install the adjustable wear pads inside the
Failure to properly support the boom lift
cylinder may result in death or injury to
13. Install the mid and fly sections into the base
Anchor a ratchet device to the boom and raise
14. Secure the retraction cable to the front of the
the lift cylinder into place. Block the lift cylinder in
base section with the nut, jam nut, and washer.
15. Secure the extension cables to the rear of the
base section with the nuts, jam nuts, and washers.
Torque the jam nut to 20 lbs-ft (27.1 Nm), then
If the hydraulic system must be activated
tighten the nut.
to extend or retract the lift cylinder,
ensure the rod end is properly aligned
16. Install the telescope cylinder retaining pin and
with the lift cylinder attach fitting.
secure in place with the bolt, washer, and plate.
Torque the bolt to 31 lbs-ft (42.0 Nm). Install the
Lubricate and install the upper lift cylinder
telescope cylinder holding valve.
shaft. Secure in place with the bolts, washers, and
retaining plate. Torque the bolts to 75 lbs-ft (101.6
17. Connect the hydraulic lines to the telescope
cylinder as tagged during disassembly.
Remove the boom and lift cylinder lifting
Activate the hydraulic system and remove the
The following procedure applies to a
boom and lift cylinder blocking devices. Lower the
boom totally removed from the crane.
boom to horizontal. Shut down the crane.
10. Connect the hydraulic lines to the telescope
cylinder as tagged prior to removal.
Ensure all blocking and lifting devices are
11. Connect any electrical wires as tagged prior to
capable of supporting the boom
Attach an adequate lifting device to the boom
RETRACTION CABLE ADJUSTMENT in this section
and suspend the boom over the machine.
for cable adjustments.
Lower the boom into position and align the
boom pivot shaft mounting holes for installation of
the pivot shaft.