in one of their three quarries.
The jobsite is located in the South of
Germany, close to the city of Ingolstadt.
The proportions are remarkable.
The machine, with an entire weight of
more than 350 tonnes, operates on the
site with a 44 m long main boom and a
dragline bucket made by Rädlinger.
The digging depth is approximately
26 m, the unloading height about 15
m. Apart from the dimensions of the
HS 8300 HD, which dwarf other duty
cycle crawler cranes in comparison,
the machine impresses with its in-
novative hybrid drive allowing an
increase in turnover at the jobsite by
up to 25%.
Powerful hybrid drive
The HS 8300 HD is the first construction machine on the
market to be equipped with the Pactronic system devel-
oped by Liebherr.
This innovative hybrid drive based on hydraulics offers
both economic and ecological advantages.
Surplus energy is stored and subsequently regener-
ated so increasing the material handling capacity while at
the same time significantly reducing fuel consumption.
•Liebherr-Werk Nenzing GmbH
Cranes Improve Productivity
In Transmission Line
On a 500Kv Power Transmission job site in Arkansas the
contractor described the following
scenario where the Tadano Mantis
greatly increased his productivity
and shortened the installation time
of dampeners and spacers on a high-
The contractor had to install 1800
dampeners, designed to reduce line
vibration in high winds, every 15
yards on these lines. He had a 21 day
window of time with the power shut
off to accomplish this.
Using a Tadano Mantis crane with
a Work Platform attachment the
crew had one man on the ground
walk under the lines and plant mark-
er flags every 15 yards.
The crane operator followed with
the boom parallel to the ground
and workers in the platform. They
stopped at each flag, boomed up,
and the crew installed the dampen-
ers. Then they would boom down, walk the crane to the
next flag, and repeat the procedure.
By using this method, and taking advantage of the
Mantis’s ability to lift without using outriggers, the con-
tractor was able to install 100 dampeners per day and
complete the task in 18 days.
The contractors would have used a tracked utility ma-
chine with a work platform. Their procedure would have
been similar, except that they would have had to carefully
position the machine, deploy outriggers, and then boom
up. The additional time needed to position the machine,
and deploy and retract outriggers would have allowed
installation of only 20 dampeners per day and would have
needed 90 days to accomplish the same task.
Contractors World International Vol 6 No 4