VARIANT OF THE AC 5.250-2 SETS STANDARDS FOR MAIN BOOM LENGTH, EXTENSION LENGTH AND LOAD MOMENT!
With the new AC 5.250L-2, Tadano is literally going one better: With its 259.2-foot-long
main boom, this 5-axle machine is at the top of its class. And the maximum main
boom extension of 98.4 feet is also “best in class”. Remarkably, all available main
boom extensions from 19.0 to 98.4 feet are self-erecting. The available maximum
system length of 357.6 feet makes the compact AC 5.250L-2 the ideal crane for urban
applications, for example for lifting air conditioning units over obstructions onto tall
buildings. Additionally, it is also ideally suited to the assembly of large tower cranes.
“Our AC 5.250L-2 is also top of the class when it comes to load moment, which at up to 736
it is one of the best on the market,” explains Peter Kleinhans, the responsible project
manager, with pride. This high load moment is achieved with a working radius 23 feet, a 44.3
foot-long main boom and a load weight of 231,920 pounds. In addition, Tadano offers an
optional heavy-lift attachment for even heavier loads up to 305,780 pounds on the short
boom with additional sheaves.
Economical Use as a Taxi Crane
Like the basic AC 5.250-2 model, the “main boom long version” also impresses with its
outstanding transport configurations. The crane with 10 x 6 drive can be moved on cost-
effective 16-inch steel wheels on public roads while complying with the 26,500 pounds axle
load limit with a considerable amount of equipment including a 32-tonne Vario hook block
and outriggers with a total weight of less than 132,300 pounds, transport brackets for
extensions, and up to 550 pounds of equipment in the rear box.
In compliance with the 36,400 pounds axle load limit with a total weight of exactly 181,900
pounds, the AC 5.250L-2 can even be driven on public roads with a 10 x 8 drive on 16-inch
steel wheels. It can not only carry a 35 US ton of hook block, outriggers, and a 39.4-foot
extension including transport brackets, but also 44,100 pounds of counterweight and up to
1,100 pounds of equipment in the rear box.
Sophisticated Counterweight Concept
The AC 5.250L-2 can pick up its maximum counterweight of 176,400 pounds in three lifts:
109,300 pounds with a radius of up to 22.3 feet at a full radius of 360° and two 33,500
pounds with a radius of up to 42.7 feet divided into 22,050 and 11,500 pounds for hanging on
the right and left of the basic package. If required, the counterweight can also be divided into
smaller pieces. For example, the 12,150-pound base plate can be picked up from a distance
of up to 75.5 feet in a full radius. “Thanks to the standard IC-1 Plus crane control system, the
possible radius can be increased considerably in certain areas of the slewing angle,”
emphasizes Peter Kleinhans. Maximum flexibility in transport logistics is also ensured by the
division of the counterweight, with no element weighing more than 22,050 pounds. This
means that smaller trucks can be scheduled for transportation if space conditions on the
construction site require it.
On board: IC-1 Plus and Surround View
Tadano has also equipped the AC 5.250L-2 with a comprehensive range of standard
features that benefit all current cranes in the Tadano AC family. This includes the innovative
IC-1 Plus crane control system, for example. It determines the maximum load capacity of the
crane in real time for each boom position depending on the slewing angle of the
superstructure. This means that the crane can always use the maximum available capacity -
especially when lifting over the outriggers. This advantage literally comes to the forefront
when the counterweight is reduced, and the outriggers are not fully extended. The AC
5.250L-2 benefits greatly from this, as its outriggers can be extended asymmetrically in five
positions of 0, 25, 50, 75, and 100 percent.
The unique Surround View camera system is also available as an option for the Tadano AC
5.250L-2, making it easier for the crane operator to optimally position the crane on the
construction site. This patented system uses six cameras to display the maximum possible
extension widths of the outriggers at the crane's current position in a computer-aided display.
“With Tadano Surround View, the crane operator can see on a display in the cab exactly how
he needs to position the crane on the construction site in order to extend all outriggers
sufficiently and ensure the required slewing radius. This eliminates the need for tedious and
time-consuming measuring and trial-and-error when searching for a location so that the
crane is ready for use more quickly,” explains Peter Kleinhans. The system also helps to
better recognize pedestrians and cyclists on the way to the construction site when turning.
Comfortable and Safe Workplace
When developing the AC 5.250-2, Tadano did not disregard the needs of the crane operator
- and the AC 5.250L-2 naturally also benefits from this: all noise-emitting hydraulic
components are positioned away from the upper cabin, making it pleasantly quiet. In any
case, the generous amount of space in both cabs ensures a high level of operating comfort
and pleasant working conditions. Safety is ensured by well-placed access steps, attachment
points for the driver's personal safety equipment, and a step that can be extended from the undercarriage for safe and convenient entry and exit to the upper cab.
The optional pendant light and a load view camera also ensure greater safety during
operation. These can be mounted alternately on the boom head and on the extensions so
that one system can be used for all configurations. When lifting over interfering edges with an
extension, the repeater, which is also available, is recommended for mounting on the boom
head to ensure a wireless connection to the camera in such cases.
Ecological and Economic Operation
On the engine side, the AC 5.250L-2 has the same drive that already delivers a convincing
performance in the AC 5.250-2: The modern Mercedes-Benz engine with 530 hp output and
a maximum torque of 1,917 lbf-ft ensures decent acceleration and strong lifting performance.
The HVO-compliant diesel engine meets the current EU Stage V and US EPA Tier4 Final
requirements. Thanks to Eco Mode, it is also particularly economical: the engine only
delivers as much power as the crane needs at any given time. The corresponding
calculations are made via the IC-1 crane control system, which also includes a fuel-saving
start/stop function. This switches off the crane engine at the touch of a button without
deactivating the control software - and the hill start assist, which is also fitted as standard,
ensures stress-free driving when starting off and maneuvering on inclines.
With the AC 5.250L-2, Tadano has added a convincing variant to the proven AC 5.250-2
basic model, which significantly extends the range of applications of this already versatile
crane even further thanks to the 259.2-foot-long main boom. The high load moment of up to
736 mt in combination with the long system length of 357.6 feet makes this crane an
extremely interesting option for many applications where heavy loads have to be lifted to
great heights - and thanks to its good taxi crane properties, it is also definitely a convincing
economic option.
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