Liebherr LTR 1060 crawler crane in high alpine use

At tunnel works on the Swiss Gornergrat railway, the second highest mountain railway in Europe, the LTR 1060 telescopic crawler crane put its skills to the test. With technical support from the Liebherr specialists it navigated a route beset with gravel, bends, and enormous slopes. In doing so, the telescopic crawler crane demonstrated once again its off-road ability under extreme conditions.

The task

The LTR 1060 en route to the site

The LTR 1060 en route to the site

The LTR 1060 en route to the site
Due to the small load capacity of the narrow bridge, the crawler crane had to drive off the low-loader. Then it navigated this alone.

The Liebherr LTR 1060 telescopic crane of Wallis-based crane operator Clausen has already proven itself in high alpine terrain on several occasions in the past. But when used in Zermatt, in the Swiss canton of Valais, both crane and team found themselves faced with an entire range of challenges.

The task for crane operator Geri Clausen was: to extend a tunnel of the Swiss Gornergrat railway for the inclusion of a ski run. The difficulty in this project was mainly in the approach to the site at an altitude of 2020 metres. The road led through a 920 metre long gravel path with the tightest of bends and gradients of up to 40 percent.

Challenges and solutions in action

Geri Clausen manoeuvred his crane through a narrow, steep bend with great skill.

Geri Clausen manoeuvred his crane through a narrow, steep bend with great skill.

A 920 metre long winding route to the job site, with an altitude difference of 180 metres, faces the LTR 1060.

Liebherr's general manager design department Hans-Dieter Willim and his team calculated the overall centre of gravity of the machine in advance, to ensure rollover safety and steerability when navigating the bends and ascents. The result: The LTR 1060 can travel the route without ballast, at a total weight of 38 tonnes with a boom angle of 20°.

On the serpentine gravel, the LTR 1060 attacks the steep ascent.

On the serpentine gravel, the LTR 1060 attacks the steep ascent.

Due to the narrowness of the path, the LTR 1060 has only a narrow track on which to navigate the serpentine. The accompanying challenges: The steering capability is severely limited by the unfavourable ratio between the crawler length and the track width.

On the tight bends the LTR 1060 must corner at precisely defined locations. Liebherr recommends putting squared timbers under the inner curve crawler chains as pivots. In addition, the direction of travel of the crawler chassis is chosen so that the chain drives are at the rear. This ensures a taut crawler chain.

The LTR 1060 masters the extreme slope with flying colours.

The LTR 1060 masters the extreme slope with flying colours.

The LTR 1060 masters the extreme slope with flying colours.
Despite the heavy load the temperatures of the gearbox and rollers remain far below the maximum permissible values.

The long, steep path stressed the gearbox heavily. The challenge is to keep the temperature of the gearbox and rollers below the maximum allowable values.

Liebherr's general manager design department Hans-Dieter Willim checked the temperature curve of the critical components on the spot using a thermal imaging camera. After consultation with the gearbox manufacturer Liebherr in Biberach, Germany, the gearbox oil level was also lowered slightly in advance. This prevents splashing losses caused by the oil being swirled around.

The conclusion

On target: against the backdrop of the Matterhorn the LTR 1060 works on the roof of a mountain railway tunnel.

On target: against the backdrop of the Matterhorn the LTR 1060 works on the roof of a mountain railway tunnel.

"We have lots of sites where this highly manoeuvrable crane is simply ideal", concludes crane operator Geri Clausen following the successful completion of the high-altitude job.

Video

In high alpine use in Swiss Zermatt the LTR 1060 defies gravel roads with tight bends and gradients of up to 40 percent. And so once more it puts its off-road capability to the test.
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In high alpine use in Swiss Zermatt the LTR 1060 masters gravel roads with tight bends and gradients of up to 40 percent. In this way, the telescopic crawler crane from Liebherr once again puts its off-road capability to the test. Open video
In high alpine use in Swiss Zermatt the LTR 1060 defies gravel roads with tight bends and gradients of up to 40 percent. And so once more it puts its off-road capability to the test.
We need your consent This YouTube video is provided by Google. If you load the video, your data - including your IP address - is transmitted to Google and may be stored and processed by Google inter alia in the USA. We have no influence over further data processing by Google. By clicking on "Accept", you consent to the transmission of data to Google for this video in accordance with Art. 6 (1) (a) GDPR and at the same time expressly consent to the transfer of data to the USA in accordance with Art. 49 (1) (a) GDPR. If you no longer wish to consent to each YouTube video individually in the future and wish to be able to load the videos without this blocker, you can also select "Always accept YouTube" and thereby consent to the associated data transmissions and transfers to Google and to the USA for all other YouTube videos which you open on our website in the future. Please note that, in the opinion of the European Court of Justice, there does not currently exist an adequate level of data protection in line with EU standards in the USA, and at present we cannot provide suitable safeguards to protect your data and offset this shortcoming. Possible risks to you of data transfer to the USA are that access by state authorities cannot be excluded and that your data could be processed for reasons of national security, criminal prosecution or for other purposes in the public interest of the USA, possibly without you being informed separately and without enforceable rights and effective means of redress being available to you. You can withdraw consent that you have given at any time with future effect via the settings. For further information, please see our Data Protection Declaration and Google's Privacy Policy.

LTR crawler cranes at a glance

LTR crawler cranes deliver short set-up times and high flexibility. They can be quickly repositioned to make them ready for use again on the site without delay. LTR crawler crane product overview

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