SET-UP AND INSTALLATION RT770E OPERATOR MANUAL
4-18 Published 04-04-2017, Control # 446-09
degree offset position align in the offset links. Install
the offset pins and clip pins.
c. Slowly elevate and telescope the boom at the same
time so that the extension does not move off of the
blocking until the offset links take the full weight of
the extension.
d. Reeve the hoist cable as described under normal
erecting procedures.
ERECTING AND STOWING THE BI-FOLD
BOOM EXTENSION WITH THE 6.1 M (20 FT)
INSERT
Erecting
1. Fully extend and set the outriggers.
2. Position the boom over the front.
3. If extended, fully retract all the boom sections and lower
the boom to minimum elevation to permit ease of
installation of pins and access to the boom nose.
NOTE: The auxiliary boom nose (rooster sheave) does not
have to be removed. However, if reeved, the hoist
cable must be removed from the sheave.
4. Attach the swingaway to the boom nose using steps 3
thru 24 of Erecting the Bi-Fold Boom Extension
Assembly.
5. Extend the boom as necessary to permit sufficient
clearance for installation of the 6.1 m (20 ft) Extension
Insert; then lower it until the tip of the bi-fold extension
assembly is laying on the ground. Block up under the bi-
fold extension, approximately 2.4 m to 3.0 m (8 ft to
10 ft) ahead of the boom nose.
6. Remove the four retainer clips and attachment pins that
secure the bi-fold extension to the boom nose.
7. Retract the boom leaving the bi-fold extension on the
blocking.
8. Using the main or auxiliary hoist cable, lift the Insert by
the lifting lugs and position it at the base end of the bi-
fold extension.
9. Mate the Insert to the bi-fold extension and install the
four attaching pins and retainer clips removed in step 6.
10. With the hoist cable still attached to the Insert, lift the
assembled unit and move the blocking, erected in step
5, to approximately 2.4 m to 3.0 m (8 ft to 10 ft) ahead of
the boom nose attach end of the Insert.
NOTE: Repeat steps 6 through steps 16 in a similar
manner to install the second Insert if applicable.
11. Lower the bi-fold and insert assembly onto the blocks
and detach the hoist cable.
12. Retract the boom and lower to minimum elevation.
13. Rig the hoist cable for single part line with nothing but
the wedge socket on the end of the cable.
14. Extend the boom and mate the attachment lugs on the
Insert with the anchor fittings on the boom nose. It may
be necessary to raise or lower the boom slightly to mate
the attach lugs.
NOTE: If the Insert attach lug holes are not in lateral
alignment with the holes in the boom nose anchor
fittings to install the pins, adjust the upper and
lower cross strut adjustment screws on the Insert to
align the holes.
15. Remove the retainer clips from the four attachment pins
stowed on the Insert and install them in the attachment
and anchor fittings on both sides of the boom nose.
Install the retainer clips.
16. Slowly elevate the boom and remove the blocking from
under the Insert and bi-fold extension.
17. Refer to steps 26 thru 30 of Erecting The Boom
Extension to erect the fly section, to set the offset, and
rig the hoist cable.
DANGER
Crushing Hazard!
Before attempting to erect or stow the bi-fold extension
with insert, read and strictly adhere to all danger decals
installed on the boom/boom nose, boom extension, insert,
and stowage brackets.
CAUTION
Possible Equipment Damage!
Do not attempt to swing the boom extension around to the
right side of the insert. This could result in damage to the
insert.
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