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Page 35

Contractors World International Vol 5 No 5

• Improved performance - increased lifting

capacity

• Trolley and load hook remain on the jib

for transport - no assembly work

• Improved erection of the compact head

Liebherr has updated its successful 160 EC-B Flat-

Top crane and unveiled its successor, the 172 EC-B

8 Litronic. The crane’s lifting capacity has been in-

creased and the crane’s erection process has been

simplified even further.

The redesign of the new 172 EC-B 8 Litronic Flat-Top

crane has resulted in a major increase in performance in

terms of its lifting capacity. Its lifting capacity has in fact

been increased by 15% over the full length of the jib.

The new Flat-Top crane will now hoist 2,100 kg at the

jib head with a radius of 60.0m and offers a maximum ca-

pacity of eight tonnes. This represents an increase of 250

kg at the jib head over its predecessor.

The modular concept and the compatibility of the

tower systems ensure that the crane is suitable for a wide

range of uses. With the Liebherr 120 HC, 170 HC or 256 HC

tower systems, free-standing hook heights of up to 71.4m

can be achieved.

New Erection Concept

Another new feature of the 172 EC-B is the new erec-

tion concept for the jib. The load hook and trolley

remain on the jib pivot section during transport.

That completely eliminates the erection work for the

trolley.

The hoist and trolley travelling ropes can also be

reeved easily with little effort providing massive benefits

particularly for jib erection in the air.

Improvedquick-releasefasteningsonthecabandswitch-

board platform allow the compact head to be split quick-

ly to reduce the erection weights. Also, the quick-release

electrical connections ensure that the switchboard and cab

can be connected quickly without any errors.

The Liebherr 37kW frequency converter hoist gear is in-

cluded in the basic version and allows empty hook speeds

of 135m/min. A 45kW frequency converter hoist gear is

also available as an option.

The frequency converter hoist gear is only used in 2-line

mode. Hook heights of up to 328m and empty hook speeds

of up to a maximum of 177m/min ensure that the crane is

economical to use.

Advanced Litronic Controller

The new 172 EC-B 8 Litronic is supplied with an ad-

vanced Litronic crane controller. Functions such as

redundant load moment measurement, manipula-

tion-proof commissioning and the monitoring of hoist

gear brake with managed lowering in emergency

mode provide a very high level of safety.

Settings such as slewing gear modes and the trolley

speed can be adjusted quickly and easily using the elec-

tronic monitor system (EMS). In crane mode, the increased

sensor resolution of the new Litronic crane controller sys-

tem also provides improved operating properties.

Liebherr-Werk Biberach GmbH

New 172 EC-B 8

Litronic Flat-Top

Crane

What’s New In Plant & Equipment