The Truck Mixers:

Increased value with

improved technology

Mixing drum, spirals and

wear protection strips are
manufactured from highstrength LH 37 steel
for extended service life.

The mixer sub-frame is manufactured from S 500, the same

steel type as that of the chassis
frame. Improved travel stability,
even over rough terrain.

High quality drive train for reliable

drum drive over several years.

The Truck Mixer

Low overall centre of gravity,

ensuring improved driveability.

Content
Ladder with spacious access platform allowing work
to be carried out safely on
the rear of the vehicle's upper section.

Extended service life

Page 4

State-of-the-art control

Page 6

Cost-effective daily operation

Page 8

Top technology

Page 10

Safety first

Page 12

Diversity of variants and semitrailers

Page 14

Options

Page 18

Smooth surfaces and

fewer edges to ensure
quick and easy cleaning.

Pivoting chute with monosupport arm, user-friendly,

support arm can be slewed to
one side for easier cleaning.

U-bolt mounting allows improved application of forces and

dynamics.

Innovative and fuel-saving

"Litronic-EMC" drum control
system on request.

The Truck Mixer

Mixing drum, spirals and

wear-protection strips are
manufactured from highstrength LH 37 steel
for reduced wear.

The Truck Mixer

Economic Due To Extended Service Life

High-grade components
The drive train and the hydraulic system are manufactured exclusively from highgrade components. This ensures torque reserves and a long service life.

Steel quality LH 37
A special steel featuring extremely tough titanium carbon nitrides is used by
Liebherr for manufacturing the mixing drum, ensuring exceptional wear-protection due to the composition of this high-grade steel (titanium carbon nitrides
feature a hardness of approx. 3200 HV). LH 37 steel was developed specially for
this application in co-operation with well-known steel manufacturers. Fabrication of this steel type is reserved exclusively for Liebherr.

Additional wear-protection
All components of Liebherr truck mixers susceptible to major wear are equipped
with additional wear-protection. Service life of these components is thus increased considerably.

3D graphic of the drum

Enhanced drive train for the drum

drive is spaciously dimensioned.
This ensures high torque reserves
and improved durability. Only
high-grade components from
renowned manufacturers are
installed.

The mixer sub-frame is manufactured

from the same steel type as that of the
chassis, ensuring consistent properties
for both frames. Mixer body and chassis are perfectly co-ordinated with one
another, with particular regard to building site applications.

The Truck Mixer

Improved comfort with minimum

consumption!
Featuring innovative and fuel-saving Litronic-EMC drum control
upon request.
An ergonomic single-hand operated control lever with button for
easy operation.

The Truck Mixer

Cost-Effective Due To State-Of-The-Art Control

Reduced fuel consumption
Speed of the diesel engine is controlled in accordance with the respective requirements by way of intelligent electronics, ensuring considerable fuel-saving.
This is facilitated via CanBus communication between the mixer control and
the vehicle.

Extended service life of the drum

Furthermore, service life of the drum is also increased by restricting unnecessary rotations of the drum (Constant-Speed-Drive). A soft stop and soft start
feature reduces forces to the drive train or the chassis, thus minimising the risk
of damage and the need for repairs.

Improved comfort during operation

The operator is free to carry out his work intuitively, and can therefore devote his
full attention to the building site. The drum can be stopped gently and easily by
pressing the button on the top of the control lever. Pressing the button again will
activate the memory function. If the button is held pressed for several seconds
during discharging, the drum automatically reverses half of a full rotation.

The Litronic-EMC (optional) saves money

on every journey

The in-cab control panel allows comfortable operation of the drum. Additionally, two softkey buttons are integrated in the panel for programming of
drum speeds. This would be practical
for example, in setting the optimum
loading speed for a specific mixing
plant.

The electronics of the truck mixer

control are installed in a protected
location, only the operating unit is
fitted at the rear of the vehicle.

The Truck Mixer

Smooth surfaces and

fewer edges to ensure
quick and easy cleaning.

The Truck Mixer

Pivoting chute featuring monosupport arm, user-friendly, support

arm can be slewed to one side for
easier cleaning.

Cost-Effective Daily Operation

Reduced soiling
Particular attention was focused on smooth surfaces and fewer edges during
the design phase of the truck mixer. Furthermore, there is a multitude of options
available, such as covers or a second drip ring, to minimise soiling. This ensures
considerable savings in time and costs during daily operation.

Exceptional service
Truck mixers from Liebherr are renowned for their high availability, not least due
to the provision of an exceptional service. Liebherr maintain a global service
network with professionally-trained personnel. You too can benefit from this excellent service simply by opting for a reliably functioning Liebherr truck mixer for
your daily operations.

The second drip ring (optional) prevents

soiling of the drum as it rotates.

In daily operation rear mudguards often sustain damage

on building sites. Liebherr
mudguards are therefore
divided to ensure quick and
easy replacement.

The Truck Mixer

U-bolt mountings ensure

that forces are applied
dynamically in the mixer
frame. The U-bolts are
arranged as a perfect fit
against the frame.

10

The Truck Mixer

All key components, such

as mixer drums for example, are manufactured by
Liebherr in our own factories.

Top Technology And Top Quality

Carefully-conceived details
A multitude of details, for example design of the connecting elements between
chassis and body, ensure reliability over several years. This allows a certain dynamic and prevents the formation of cracks during operation in rough terrain.

Precision sub-frame
Over 180 different mixer sub-frames have been designed by Liebherr for the
multitude of chassis designs and types. Not only are these sub-frames manufactured to absolute precision, they also guarantee optimum weight distribution
across the axles.

Perfect co-ordination with the chassis

Every Liebherr truck mixer body has been designed in close co-operation with
the truck manufacturers to ensure perfect co-ordination with the respective
chassis. Moreover, Liebherr has been the first manufacturer of truck mixers certified in accordance with the ISO 9001 standard.
The 3D-CAD applied during the design phase allows exceptional precision. A
finite element evaluation replicates potential stresses using the computer, the
results of which are applied to considerably improve the overall quality.

The mixer sub-frames are pressed to the

shapes relevant to the respective chassis
using CNC-guided laser precision.
The connecting elements are welded by
robots, and the sub-frames then undergo
shot blasting and priming.

The Truck Mixer

11

Low overall centre of gravity,

leading to improved driveability.

Ladder with spacious access platform

allowing work to be carried out safely
on the vehicle's rear upper section.

12

The Truck Mixer

Safety First
Safe driving
The low overall centre of gravity improves stability during driving, both on road
and off-road. The wide-set rollers ensure optimum support of the drum, especially when driving off-road.

Safe handling
A generously-dimensioned ladder with spacious access platform, designed in
compliance with the respective statutory guidelines, is tremendously beneficial
for the operator during daily operation.

Safety during maintenance

For inspection, the drum can be fixed securely with an interlocking drum safety
device.

Improved safety via the Litronic-EMC (optional)

This system prevents any potential operating errors, for example it will not allow
rotational direction of the drum to be changed when the drum is rotating at full
speed. It also allows alternative operation with buttons without using the control
lever, or using the in-cab control.
The operating unit on the rear of the vehicle can be blocked to prevent actuation
by unauthorised personnel.
During driving, the rear-mounted control unit is blocked automatically.

The wide-set rollers ensure

optimum support of the drum.
It is possible to fix the drum
securely with an integrated
interlocking drum safety
device before commencing
maintenance and inspection
work.

The optional reversing camera allows

improved visibility on the building site,
as well as ensuring safe handling.

The Truck Mixer

13

Design "Longlife"

14

The Truck Mixer

Design with LTB conveyor belt

Diversity Of Variants
Lightweight design
Liebherr offer weight-optimised truck mixer bodies in a lightweight design for
countries where axle load restrictions are in effect. Considerable reductions in
weight can be achieved with certain design features and the utilisation of lighter
materials, such as plastic or aluminium. A lighter chassis can also offer additional weight advantages. For example, 8 m of concrete can be transported legally
with a 4 axles mixing truck at an overall permissible weight of 32 tons (depending
on the respective chassis).
Moreover, LH 37 spiral blades with a thickness of 4 mm are also installed in
the lightweight design. Life-expectancy of the spiral blades is approximately the
same as the drum walls.

Longlife design
The modified Longlife version has been designed for particularly tough applications.
This would be practical for applications involving extremely abrasive material,
such as hard crushed rock. Thicker spiral blades (5 mm) made of LH 37 special
steel ensure longer service life for tougher applications.

LTB - the conveyor belt from Liebherr

Liebherr truck mixers are also available in combination with a conveyor belt.
The LTB allows materials other than concrete, such as sand, gravel or crushed
stones, to be transported directly to the building site. This service is particular
favoured by customers and it is often decisive in securing additional contracts.
Liebherr truck mixers and conveyor belts are perfectly co-ordinated as they are
designed and manufactured from the same source.

Quick-lock system
Design of the truck mixer as a quick-lock system allows the chassis to be used
with different superstructures, such as a tipping body for example.

... or as a quick-lock system

The Pumi also features a Liebherr mixer body

The Truck Mixer

15

A wider, continuous frame

provides optimum stability
with minimum proper weight.

16

The Truck Mixer

The Semitrailer
Semitrailers currently in trend
Truck mixers as semitrailers are becoming more and more popular. The addition
of a semitrailer to your vehicle fleet will cover peaks at large-scale concreting
projects. Interchangeability is another significant advantage, whereby with lower
volumes of orders for the transport of concrete, the tractor unit can be used to
carry sand, gravel or cement.

Outstanding driving characteristics

Excellent driving characteristics due to a wide, extremely torsion-resistant frame,
designed as a continuous unit without crank. Also the low centre-of-gravity has
a positive influence on driving behaviour. The rear section is designed exceptionally functional with smooth surfaces for easy cleaning.
The semitrailer is also available in a Lightweight version.
Depending on the respective country and axle load restrictions, twin-axle trailers are also available with extended axle-base for extra payload.

This photo shows an HTM 1004 ZA

in 38 ton configuration.

A low centre-of-gravity, wide spring

track and high-grade axles guarantee
outstanding driving characteristics.

Version with separate engine, different tractor units can be used.

The Truck Mixer

17

Options

Compressed air tank for liquid

admixture
Pneumatically actuated tank allows the addition of liquid admixture directly at the vehicle.

Extension chutes
The using of plastic extension
chutes improves handling and reduces weight by 50 %.

18

The Truck Mixer

Non-pressurised tank for

liquid admixture
This tank allows the addition of liquid admixture directly into the truck mixer.

Reducing chute
When discharging fluid concrete,
a reducing chute equipped with a
pipe can be implemented.

Cover for chassis frame

Plastic cover for the chassis frame
as added protection against soiling.

Folding chute
A folding chute with safety hoop allows
simple extension of the pivoting chute.
Available in steel or plastic.

Plastic cover
A cover between mudguard and
mixer sub-frame protects the drum
against soiling from below.

Outer cover of the rear drum pedestal

An aluminium outer cover can be mounted onto the rear drum pedestal to effectively prevent soiling and encrustations
during loading and unloading.

Inner cover of the rear

drum pedestal
Fitted with the outer cover,
a fully enclosed structure is
formed around the rear drum
pedestal.

Chute flap
The chute flap features a sealing
edge made of durable plastic. This
prevents any subsequent dripping
and soiling.

Mortar bucket holder

For PTO driven truck mixers a
holder designed for maximum 10
mortar buckets can be mounted.

Aluminium rear mudguards

As an alternative option, the rear mudguards are also available in aluminium
design.

The Truck Mixer

19

Options

Second drip ring

The second drip ring further reduces soiling of the mixer drum.

Sliding ladder
A sliding ladder is also available in
place of the standard folding ladder.

20

The Truck Mixer

Drum gate systems

Liebherr offer gates in fully-closed and
partially-closed designs for the transport
of fluid materials. This guarantees a perfect seal, even when the drum is rotating.

Pressure gauge on
hydraulic system
A pressure gauge assists to
evaluate the conistency of the
loaded concrete over several
loads.

Rubber elevation on the inlet hopper

To ensure that the truck mixer drum does
not become soiled during loading, a rubber elevation can be fitted to the inlet
hopper.

Working headlight
The working headlight allows optimum
visibility when discharging the truck
mixer in darkness.

Water shut-off tap

To prevent the water line from freezing in colder weather conditions, a
shut-off tap can be mounted underneath the water tank.

Spare wheel holder

Permanent spare wheel holder
with crane and rope winch.

Water meter
Addition of water can be determined and regulated using the water meter.

Intelligent drum control Litronic-EMC

The easy-to-use, Liebherr electrical
drum control Litronic-EMC minimises wear and reduces considerably fuel
consumption.

Step on the underrun guard

For safe standing on the underrun
guard, a slip-resistant step can be
fitted.

Separate engine
Alternatively, power can also be acquired from a separate Deutz engine which can be equipped with a
soundproofing hood.

The Truck Mixer

21

Diversity On Wheels

22

The Truck Mixer

The Truck Mixer

23

Technical Data:
Superstructures

Nominal filling
in m
hardened
concrete

Water volume
in m

Geometric
drum volume
in m

HTM 604

6,8

HTM 704

HTM 804

Mixer weight in configuration

Vehicle drive
in kg

Sep. engine
in kg

11,0

3360

3860

7,7

12,3

3480

3980

9,1

14,3

3855

4355

HTM 904

10,2

16,0

4030

4660

HTM 1004

10

11,0

17,6

4350

4980

HTM 1004 K

10

11,0

17,4

4480

5110

HTM 1204

12

12,9

20,7

4990

5620

HTM 1204 K

12

12,6

18,3

4900

5530

HTM 1504

15

15,3

24,5

5600

K = Short design

Semitrailer*

Mixer weight including semitrailer

HTM 904 ZA

10,2

16,0

6930

7830

HTM 1004 ZA

10

11,0

17,6

7290

8190

HTM 1004 ZA/38

10

11,0

17,6

7380

8280

HTM 1204 ZA

12

12,9

20,7

7820

8720

HTM 1204 DA

12

12,9

20,7

8560

9460

HTM 1504 DA

15

15,3

24,5

11450

12350

ZA = Twin-axle semitrailer, DA = Triple-axle semitrailer.

* Weights dependent on tractor units and axle aggregates of semitrailer.
Weight specifications complete mounted/ready for operation in accordance with DIN 70020, deviations +/ 5 %.
Applicable for all Liebherr truck mixers: Drum speed: 012/14 rpm.
Noise emission level at operator's station: 85 dB/A in accordance with 89/392/1.7.4 F EWG and 3 GSGV

Printed in Germany by Eberl BK RP LMT 820306605-6-11.10_enGB

Liebherr-Mischtechnik GmbH
Postfach 145, 88423 Bad Schussenried/Germany
+49 7583 9 49-0, Fax +49 7583 9 49-3 96
www.liebherr.com, E-Mail: info.lmt@liebherr.com

Subject to technical modifications.