1. ­48 OEM Off-Highway MARCH 2014
technology Breakdown
www.oemoffhighway.com/11302011
In addition to the new pieces of
equipment Liebherr Construction
Equipment Co. (company informa-
tion, 10055719), Newport News, VA,
displayed at CONEXPO-CON/AGG 2014,
the company also decided to exhibit
for the first time in the U.S. the various
components it manufactures both for
its own group and other OEMs (learn
more, 11290704 and 11300742).
Components on display included
roller bearing slewing rings and gear-
boxes, as well as the company’s new
Tier 4 Final engine using an SCR-only
aftertreatment system.
Pietro Iemmi, Managing Director
of Liebherr-Components AG, says the
company has been making a consid-
erable effort to expand its activities
in the field of components. In 2012,
the central sales and service company
Liebherr-Components AG (company
information, 11300739) was formed
to manage Liebherr’s components
business worldwide, focusing on sales
to customers outside of the Liebherr
Group.
Construction, mining and other
specialty equipment OEMs are the
target customers for the division, and
one of the reasons it chose CONEX-
PO-CON/AGG 2014 (event information,
10207294) as an exhibition platform.
Iemmi also notes that Liebherr has
identified North America as a key
market for sales, in addition to Europe,
Russia and China. “Liebherr has been a
key supplier to many U.S. organizations
in the wind industry for several years,”
he says. “However, when it comes to
the mobile machinery industry, we are
just getting started.”
Tier 4 Final engines
Liebherr develops engines not only for
its own equipment, but also for other
OEMs. Iemmi says that so far the com-
pany has supplied engines to OEMs in
Europe, Russia and North America.
A highlight at Liebherr’s compo-
nents pavilion was the new 8-
cylinder Tier 4 Final diesel engine.
Liebherr was able to develop an
aftertreatment system for
the engine which uses
only selective catalytic
reduction (SCR) to meet
emissions regulations.
Because of this, there is
no need for additional
diesel particulate filters
(DPF), exhaust gas recir-
culation (EGR) or oxygen
catalysts. “Ideal system
integration and intelligent
development solutions have
made it possible to reduce untreat-
ed particulate emissions within the
engine to a level below the specified
limit,” says Andreas Bogner, Head of
Sales, Diesel Engines, at Liebherr-
Components AG.
When developing its Tier 4 Final
engines, Liebherr made sure it kept
worldwide emissions regulations in
mind. “Most machinery manufactur-
ers don’t just sell to the U.S. or South
America, they want to offer their ma-
chines all over the world,” Bogner says.
Expansion into the
realm of componentry
To broaden its business potential, a heavy equipment OEM has begun
offering its components for use in machinery developed by other OEMs.
by Sara Jensen
Liebherr’s Tier 4 Final engine
uses an SCR-only aftertreat-
ment system to meet emissions
regulations, eliminating the need
for a diesel oxidation catalyst or
exhaust gas recirculation.
Liebherr-Components AG
Visit
Liebherr at
CONEXPO at
booth 2155.

2. OEM Off-Highway MARCH 2014 49
“Since in many countries only Tier 3 or
even Tier 0 regulations remain in place,
we have come up with an engine set
that complies with all requirements at
different stages of expansion.”
While the basic interface of the
engine stays the same for each market,
the aftertreatment system dictates in
which one it can be used. For markets
without any emissions regulations, the
most basic version of the engine, with-
out an exhaust gas aftertreatment sys-
tem, is available. Once an EGR system
is added, the engine will comply with
Tier 3 regulations. Adding Liebherr’s
SCR-only system to the basic engine
design enables Tier 4 Final compliance.
“Offering the same interfaces for every
market facilitates machinery design
and enables our customers to sell used
Tier 4 Final machines into lesser
regulated markets, as the en-
gines can also be downgraded,”
says Bogner. “This increases the
resale value significantly.”
In addition to developing the
engine itself, Liebherr also designed
the common rail fuel injection system
being used on the engine, as well as
the engine controls. Because Liebherr
designed these systems itself, the com-
pany is able to ensure optimal system
integration. Both of these technologies
Liebherr’s components division
produces ball and roller bearing
slewing rings with diameters up
to 135 in.
Liebherr-Components AG
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are also available for integration into
other manufacturers’ engines. Liebherr
can supply either single components
of the common rail technology
or a complete system, de-
pending on the manufactur-
er’s needs. For the electronic
control unit, the hardware and
corresponding software are both
available, which can help facilitate the
integration of the common rail fuel
injection system, says Bogner.
Other features of the new engine
include a leakage-free injection
system, stable multiple injection and
a working pressure of up to 2,200 bar,
all of which contribute to efficient
fuel combustion and improved fuel
efficiency.
Mounted onto the engine Liebherr
displayed at CONEXPO was a hydraulic
driveline, also developed by Liebherr
and available from its components
division. “We deliver the diesel engine
with hydraulic driveline as a single
assembly to customers to ensure a
cost-effective and easy installation into
the machines,” says Bogner.
Included on the driveline is a splitter
box with four output shafts, as well as
two hydraulic pumps designed as axial
piston pumps with swash plates. The
splitter box is capable of transmitting a
maximum power of 500 kW; it is used
to drive three variable axial piston
pumps for closed circuits, as well as
one axial piston double pump for open
circuits. “All these components are very
well matched to each other and to the
powering diesel engine, and therefore
have a high overall degree of efficien-
cy and compact build,” says Bogner.
“They are also proven and tested in the
most adverse environments.”
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