Liebherr ER 954 C User Manual
Excavators Electric
Material Handlers
ER 934 C - ER 954 C
ER 934 C Operating Weight: 38,050 – 39,450 kg
ER 944 C Operating Weight: 52,050 – 53,750 kg
ER 954 C Operating Weight: 63,900 – 76,200 kg
ER 934 C
ER 944 C
Operating Weight: 38,050 – 39,450 kg
Engine Capacity: 160 kW / 218 PS
ER 954 C
Operating Weight: 63,900 – 76,200 kg
Engine Capacity: 250 kW / 340 PS
Operating Weight: 52,050 – 53,750 kg
Engine Capacity: 200 kW / 272 PS
ER 934 C ER 944 C ER 954 C Material Handlers
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Performance
These new electric Material Handlers have been designed
to meet the specific needs of industrial handling. A wide
range of equipment and uppercarriages optimized for
long working radius provide the ideal answer to all the
demands which arise in the industry.
The performance of the kinematic chain formed from components from our in-house production, combined with the
power of the electric motor, maximize the performance
of the machine when it comes to lifting power, precision,
and speed of operation. The equipment’s performance is
enhanced by the mobility provided by the crawler undercarriage.
Comfort
Helping the operator to concentrate on his work and get
the best out of his machine is achieved by providing a
comfortable driving position, good visibility, and a highly
ergonomic layout of the controls. The new electric Material Handlers offer the same level of comfort as on the
mobile excavators (arrangement of the controls, driver’s
seat, climate control, large window areas, etc.). The electric motor system adds a further layer of comfort thanks
to the low noise emissions and absence of vibration. For
Liebherr, comfort also means ease of daily maintenance
of the machine in terms of access to the service and inspection points, so as to minimize down time.
Reliability
Backed by more than 30 years experience in the construction of electric excavators, Liebherr designed the
new ER 934 C, ER 944 C and ER 954 C with the aim of
providing top performance whatever the challenge might
be. The structure of the machine, using components from
our own manufacture for the electric drive, has been
completely rethought, and so moves away from simply
being an adaptation of a diesel-engine machine. Being
intended for key functions in the organization of industrial
sites, Liebherr electric Material Handlers provide a very
high level of reliability. The service life of the hydraulic
components has also been increased, thanks to
the smoother movement of the electric drive. The
concept of the single actuator (one single elec-
tric motor for all the hydraulic functions) allows
all the low-voltage functions to be concentrated
in a single box.
Economy
Investing in the acquisition of an electric Material Handler
is a great long-term advantage. Constant increases in the
costs of conventional energy sources are pushing up operating charges, and reducing profi t margins considerably. Environmental criteria, in particular CO2 emissions,
are also playing a constantly greater part in the choice of
power systems and working methods. With the electric
drive, Liebherr offers an economical alternative to conventional diesel-engine machines, and a solution with
real respect for the environment. Also, the excavator is
permanently available, with no need to refill. There are no
constraints (e.g. DPF or AdBlue).
ER 934 C ER 944 C ER 954 C Material Handlers
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ER 934 C ER 944 C ER 954 C Material Handlers
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Side or rear cable opening for freely
positioning the cable on the ground
•Powersupplythroughmulticorewiring
cable entrance (funnel-shaped) especially
designed for travelling machines
•Forlongerdistancesacablereelcan
be proposed as an option
•Heavydutyconnectingboxttedonthemiddle
piece of the undercarriage with switching system
Performance
These new electric Material Handlers have been designed to meet the specifi c
needs of industrial handling. A wide range of equipment and uppercarriages optimized for long working radius provide the ideal answer to all the demands which
arise in the industry. The performance of the kinematic chain formed from components from our in-house production, combined with the power of the electric
motor, maximize the performance of the machine when it comes to lifting power,
precision, and speed of operation. The equipment’s performance is enhanced by
the mobility provided by the crawler undercarriage.
Exceptional lift capacity
Excellent Working
Radius
Fast work cycles
Precision
Thanks to optimized kinematics and uppercarriage,
the machines offer extended reach and balance
with a better absorption of mechanical forces.
Designed for the most demanding applications, the
machines offer extended reach and lift capacity in
wide working radius.
The ER 934 C, ER 944 C and ER 954 C electric
excavators are fitted with the Liebherr Torque Control system. The hydraulic guidance system on the
excavator operates as a closed circuit, and does
not affect the speed of movement of the equipment during the working cycle. The high torque and
high oil delivery from the guide pump maximize the
excavator swing speed.
A two-pump hydraulic system allows for operating
speeds to be reached which are unequalled anywhere. Regeneration on the circuits for the equipment allows for optimization of the hydraulic power
available and minimizing response time to the operator’s commands.
The hydraulic control allows for exceptional precision - even at extended reach - contributing to the
confidence of the operator and achieving high performance as a result.
Distributor
•Fineresponseofhydrauliccontrol
for maximum working precision
•Immediateresponsetooperator‘s
commands
•Three-pumphydraulicsystem,oneof
which is a closed circuit dedicated to
uppercarriage swing
High strenght structure
•Highstrengthsteelsheetatpoints
subject to severe stress.
•Stablemountingofequipment
elements
•Exceptionalstrength,evenunder
intense loading
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ER 934 C ER 944 C ER 954 C Material Handlers
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Reliability - Safety
•AutomaticPowercutoffif
the cabinet doors are opened
•Automaticpowercutoffin
the event of any anomalies
(electric motor or its bearings
overheating)
•Activesafetyon
the transformers in
the electric cabinet
•Possibletolockwithpadlock
Reliability
Backed by more than 30 years experience in the construction of electric excavators, Liebherr designed the new ER 934 C, ER 944 C and ER 954 C with the aim of
providing top performance whatever the challenge might be. The structure of the
machine, using components from our own manufacture for the electric drive, has
been completely rethought, and so moves away from simply being an adaptation
of a diesel-engine machine. Being intended for key functions in the organization
of industrial sites, Liebherr electric Material Handlers provide a very high level of
reliability. The service life of the hydraulic components has also been increased,
thanks to the smoother movement of the electric drive. The concept of the single
actuator (one single electric motor for all the hydraulic functions) allows all the
low-voltage functions to be concentrated in a single box.
Electrical
system
Protected
electric cabinet
Electric motor
Totally integrated into the structure of the uppercarriages
and accommodated in a metal container, the electric cabinet
provides a three-fold level of protection to the components
of the electrical system:
- Mechanical (insulation from vibrations and from the possible impact of falling objects)
- Heat (maintains a constant temperature thanks to the heating resistors which prevent corrosion from condensation)
- Electrical earthing of the structure and disconnection from
current is controlled from the cab by way of a motorised
circuit-breaker.
The electric cabinet, such as the collecting pipe, provides
IP55 class protection. A filtered ventilation system which
avoids any dust penetration and, with permanent ventilation, ensures the thermal balance of all the components.
Liebherr electric excavators are equipped with motors especially designed for really tough applications. The dimensions
of the motor allow for the full power to be drawn from the
kinematic chain, and so maximises the performance of the
machine especially in the combined movements. The motor
can resist a momentary overload of up to +25 % of its rated
capacities. Protected against penetration by water and dust,
its properties correspond to protection class IP55.
The temperature of the roller bearings and other bearing
elements is constantly monitored, and, in the event of overheating, the operator is warned of malfunction on the console at the driving position.
Cooling system
•Generousdimensions
for high cooling capacity
•Verticalarrangementforincreased
efficiency and minimal incursion of
foreign bodies
•Poweredbyathermostatically
regulated hydraulic motor
•Hingedtoallowforcomplete
cleaning
•Reversibleactuationofthefan
(without time limit) as option
Undercarriage
•TheundercarriagesarethoseoftheEW
or S-EW diesel machines for industrial
applications, flat or ribbed tiles
•Theundercarriagesaredesignedand
built especially for electric excavators:
- side cable opening
- armoured junction box
- electrical collecting pipe
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Cab with control panel
•Thecommandarrangementfor
putting the electrical system under
voltage is progressive (3 functions)
and the emergency stop button allows for the general cutting of the
electric cabinet supply
•Availableasanoptionisacutoff
system deriving from one source
point, which can be activated from
the driving position via an additional rotating joint
Comfort
Helping the operator to concentrate on his work and get the best out of his machine is achieved by providing a comfortable driving position, good visibility, and
a highly ergonomic layout of the controls. The new electric Material Handlers
offer the same level of comfort as on the mobile excavators (arrangement of the
controls, driver’s seat, climate control, large window areas, etc.). The electric motor system adds a further layer of comfort thanks to the low noise emissions and
absence of vibration. For Liebherr, comfort also means ease of daily maintenance
of the machine in terms of access to the service and inspection points, so as to
minimize down time.
Driving position
Low noise emissions
Carbon gas emission
Mounted as standard on a fixed platform of
1,200 mm ( 2,000 mm or hydraulic platform on request), the new cab on the electric excavators
meetsallsafetystandardsinforce(24 Vsupplyin
the operator’s compartment), comfort, panoramic
visibility, and ergonomic arrangement of the controls for perfect control of the machine.
Liebherr electric excavators are really quiet in operation. Their measured acoustic level is from 4 to
5 dB lower than an equivalent diesel-engine version.
The level of noise intensity from a Liebherr electric
excavator represents less than a third of the noise
generated by a diesel-engine unit.
Zero grams of CO
emitted per tonne of product
2
handled!
Climate control entirely automatic
•Automaticclimatecontrolensuresa
level of comfort similar to a private car
•Twosensorsforprecisetemperature
regulation
•Ventilationapscanbeadjusted
at the touch of a button
•Rapiddemistinganddefrosting
of the windscreen thanks to the
«reheat“ function
Parallelogram hydraulic lift
•Improvedvisibilityoftheoperator
over his workspace
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Wide range of solutions
•Modulararrangement
for rapid changeover
•Liebherrquick-couplingsystem,
mechanical and hydraulic, for
efficient equipment changeover
•Quick-couplingarrangementfor
hydraulic lines (Multi-Coupler)
•Completerangeofgrapples
•Rangeofdifferentwoodgrapples
and grab buckets from Liebherr
Economy
Investing in the acquisition of an electric Material Handler is a great long-term
advantage. Constant increases in the costs of conventional energy sources are
pushing up operating charges, and reducing profit margins considerably. Environmental criteria, in particular CO2 emissions, are also playing a constantly
greater part in the choice of power systems and working methods. With the electric drive, Liebherr offers an economical alternative to conventional diesel-engine
machines, and a solution with real respect for the environment. Also, the excavator is permanently available, with no need to refill. There are no constraints (e.g.
DPF or AdBlue).
Flexibility and versatility
Energy costs cut
Increased service life
Maximum availability
Liebherr electric Material Handlers are multi-tasking
machines. With a wide range of tools, which can be
combined with Liebherr quick-coupling systems,
they can create a degree of flexibility and versatility
which has no comparison anywhere.
The energy yield from an electric motor is greater
than that of a diesel-engine. Delivering the same kW
output in hydraulic power costs three to five times
less with an electric excavator than with a diesel-engine unit. Liebherr excavators deliver the full power
from their kinematic chain and at a lot less cost.
The smooth actuation of the electric drive and the
reliability of Liebherr hydraulic components mean
that the maintenance costs of the excavator can be
reduced considerably.
The absence of vibrations and variations in output
from a motor, which operates on a torque principle
and at constant output, means that the stress on
the kinematic chain can be reduced and the optional pre-heating of the hydraulic system allows for the
hydraulic oil to be kept at an optimum temperature
right from the start.
The costs associated with maintenance operations
are reduced to a minimum, and that also cuts downtimes. The electric motor does not require any maintenance beyond lubrication of the bearings every
3,000 hours. No filters (air, oil) to be changed and no
draining of engine oil throughout the entire service
life of the machine.
Kinematic chain made by Liebherr
•Constantprovisionofpower
for the kinematic chain
•Reducedwearofhydraulic
components
•Optimumexploitationofthehydraulic
power potential of the system
Backhoe stick with sorting grapple
•Numerouscombinationsareassociated with Liebherr’s wide range of tools
(straight and angled mono boom,
sticks and industrial sticks, etc.)
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