BOOM
RT765E-2 SERVICE MANUAL
4-24
Published 9-04-2014, Control # 422-08
SWINGAWAY BOOM EXTENSION
Description
A 33 ft (10.1 m) fixed offsetable or a 10.1 to 17.1 m (33 to 56
ft) folding offsetable swingaway boom extension is provided
to obtain additional boom reach.
The boom extension mounts directly to the boom nose
utilizing a four point attachment. In addition, the swingaway
can be stowed on the right side of the boom base section.
Removing the attach pins from the attach points on the left
side of the boom nose allows the swingaway to be rotated
and stowed on the right side of the boom base section.
The fixed swingaway weighs approximately 1706 lb (774 kg)
and the folding swingaway weighs approximately 2430 lb
(1102 kg).
Maintenance
NOTE:
Before attempting to erect or stow the swingaway,
read and strictly adhere to all danger decals
installed on the swingaway and stowage brackets.
Removal
NOTE:
If an adequate lifting device is available, the
swingaway boom extension can be dismounted
directly from the side of the boom.
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.
4.
Extend the boom enough to disengage the spring
loaded boom stop block (Figure 4-4).
5.
Pull down on the handle to disengage the spring loaded
boom stop block. Place the end of the handle in the
retainer plate. Fully retract the boom.
NOTE:
When the boom retracts, the handle will be
released allowing the stop block to engage when
the boom is extended.
6.
Remove the retainer clips from the attachment pins
stowed in the base of the boom extension and insert the
attachment pins through the attachment and anchor
fittings on the right side of the boom nose. Install the
retainer clips in the attachment pins.
NOTE:
If boom extension fly section (stinger) is not to be
removed, it should remain on the stowage brackets
on the side of the boom.
NOTE:
If removing the boom extension fly section with the
boom extension base section skip to step 11. If not
removing the extension fly section perform steps 7
thru 10 and skip step 11.
7.
Remove retainer clip from base to fly attachment pin and
remove attachment pin from base section to fly section
attachment fittings.
8.
Stow the pin in the opposite attachment fitting or the
stowage lug.
9.
Ensure the fly attachment pin attaching the fly extension
section to the boom base section rear stowage bracket
(Figure 4-5) (Detail D) is in place.
10.
At fly section sheave end (Figure 4-5) (Detail E) push in
on spring loaded latch hook to release latch, allowing the
base to separate from the fly.
11.
Remove the pin attaching the fly extension section to the
boom base section rear storage bracket (Figure 4-5)
(Detail D).
FIGURE 4-4
7921
Reference Only
