Grove Published 04-04-2017, Control # 446-09 4-17
RT770E OPERATOR MANUAL SET-UP AND INSTALLATION
22. Ensure that all of the stowage lugs on the base and fly
are fully engaged with the pins on the stowage brackets.
23. Fully lower the boom.
24. Install the pin securing the extension base to the front
stowage bracket (Figure 4-8), (Detail A). Ensure the lock
hitch pin is pushed all the way in.
25. Install the pin attaching the fly section to the boom base
section stowage bracket (Figure 4-10), (Detail D).
NOTE: If the extension fly section remained on the boom
stowage brackets, perform steps 26 through 29.
26. Remove retainer clip and attachment pin from the
bushing on base section.
27. Insert the attachment pin into the base section to fly
section attachment fittings and install the retainer pin.
28. Ensure the spring loaded latch hook is engaged on fly
section sheave end (Figure 4-10), (Detail E).
29. Ensure the pin attaching the fly section to the boom base
section stowage bracket (Figure 4-10), (Detail D) is in
place.
30. Remove the retainer clips and attachment pins from the
anchor and attach fittings on the right side of the boom
nose and stow them in the base of the swingaway.
31. Extend the boom in AUTO mode with B mode selected,
or Manual Mode with Section 1 selected, until the boom
stops.
NOTE: Reaching this stopping point is required for the
Boom Extension Rigging Mode process.
32. Retract the boom until it stops on the stop block.
NOTE: When the boom reaches this stopping point and
the section 1 and section 2 proximity switches are
activated, the Boom Extension Rigging Mode is
complete and the restrictions on the boom
operating modes are removed.
33. Rig the boom nose and hoist cable as desired and
operate the crane using normal operating procedures.
Setting the Folding Swingaway Offset
1. Extend and set the outriggers and swing the boom to
over the front. Position the boom to above horizontal.
2. Block under the tip of the extension assembly section.
3. To set the offset from a lesser degree to higher degree
perform the following procedures:
a. Slowly lower the boom until the pressure is relieved
on the offset link pins.
NOTE: For 25 or 45 degree offset, make sure the mast is in
the raised position.
b. Remove the offset link clip pins and attach pins
securing the offset links in the lesser degree offset
position. If going to maximum offset stow them in
the stowage lugs. If going to the intermediate (25
degree) offset install them in the offset links for that
degree of offset.
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.
4. To set the offset from higher degree to lesser degree,
perform the following procedures:
a. Slowly lower the boom until the pressure is relieved
from the offset links.
b. Remove the offset link clip pins and attachment pins
and lower the boom until the holes for the lesser
DANGER
Failure to maintain the proper clearance between the
base extension anchor fittings and the boom nose attach
fittings could cause these fittings to contact each other
during operation of the boom.
DANGER
Crushing Hazard!
Ensure any blocking material used is adequate to support
the weight of the extension assembly without tipping or
falling.
CAUTION
Possible Equipment Damage!
Do not overload the extension anchor fittings or the
extension base section when lowering the boom.
CAUTION
Possible Equipment Damage!
Do not overload the extension anchor fittings or the
extension base section when lowering the boom.
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