Manitowoc Grove RT765E-2 Service And Maintenance Manual page 180

BOOM
When erecting the boom extension, ensure that all
personnel and equipment are kept clear of the swing path.
Death or serious injury may result if this warning is not
followed.
16. Slightly raise and/or lower the boom to help control the
extension. Using the rope attached to the tip of the
extension, swing the extension into place ahead of the
boom nose, engaging the anchor fittings with the
attachment fittings on the left side of the boom nose.
CAUTION
Do not modify the attach points to permit the installation of
the attachment pins.
17. Install the attachment pin into the upper anchor and
attachment fitting on the left side of the boom nose.
Install retainer clip in attachment pin.
18. Fully retract the boom until the bottom extension anchor
fitting is against the boom extension alignment device
and install the attachment pin in the lower anchor and
attachment fittings on the left side of the boom nose.
Install the retainer clip in the attachment pin.
19. Extend and lower the boom until blocking can be placed
under the extension base. Remove the rope from the tip
of the extension base.
20. Lower the extension onto the cribbing. Remove and
stow the pins securing the extension to the boom nose.
21. Retract the boom, freeing the extension from the boom
nose.
Installation
1. Position the crane so the boom extension lies in front of
the crane with the extension base facing the crane. Fully
extend and set the outriggers.
2. Extend and lower the boom to engage the anchor and
attachment fittings on the extension base.
3. Install the attachment pins and retainer clips to secure
the extension base to the boom nose. Raise the boom,
lifting the extension base from the cribbing on which it
was resting.
NOTE: It may not be necessary to install the lower leg
attachment pin. If so, skip to step 4.
4. Remove the pin and clip pin securing the boom
extension alignment device in the stowed position. Pull
the push bar assembly out to the working position and
secure it in place with the pin and clip pin.
4-30
WARNING
Published 9-04-2014, Control # 422-08
RT765E-2 SERVICE MANUAL
5. Lower the boom to minimum elevation.
6. Attach a length of rope to the extension base tip.
7. Raise the boom to horizontal.
8. Remove the retainer clips and attachment pins from the
anchor and attachment fittings on the left side of the
boom nose and stow them in the base of the extension.
9. Extend the boom enough so that the extension base and
fly stowage lugs will line up in front of the guide ramps
and pins on the stowage brackets when the swingaway
is positioned to the side of the boom.
CAUTION
Do not modify the attach points to permit the installation of
the attachment pins.
When stowing the boom extension, ensure that all
personnel and equipment are kept clear of the swing path.
Death or serious injury may result if this warning is not
followed.
CAUTION
Do not allow the extension assembly to slam into the
stowage brackets when swinging into the stowed position.
10. Raise and/or lower the boom to help control the
extension and using the rope attached to the tip of the
extension, swing the swingaway to the side of the boom.
11. Elevate the boom and push in on the extension to align
the stowage lugs on the extension with the guide ramps
and pins on the stowage brackets and fully retract the
boom.
During disengagement of the stop block, extend the boom
only enough to free the block. Extending the boom too far
will cause the swingaway to slide off the guide ramps and
allow the extension to swing. Death or serious injury may
result if this warning is not followed.
12. Lower the boom and extend the boom only enough to
disengage the spring loaded boom extension stop block.
WARNING
DANGER