Liebherr’s LTM 1650-8.1 is the brand new replacement for its venerable 500 tonne capacity LTM 1500-8.1 wheeled mobile telescopic crane.
The newest star of Liebherr’s wheeled mobile crane range is the LTM 1650-8.1. It is successor to the venerable LTM 1500-8.1. Almost 600 examples of that model were built, making it the best-selling large crane of all time, Liebherr said. A lot for the new model to live up to then.
The new crane has a nominal capacity of 700 tonnes. For the boom there are 54 and 80 metre options. It is designed to deliver maximum performance and maximise what is possible on an an eight axle carrier, Liebherr said. Lattice boom extensions include fixed jibs from 6 to 55 m and the luffing jib options range from 21 to 91 m. The fixed and luffing jibs can be fitted to the 54 and 80 m booms. Maximum hook height is 153 m and 110 m is the longest radius.
Capacities are higher on the new crane than the outgoing 500 tonne model by between 15 and 50 per cent, according to whether or not the optional boom guying system is fitted, Liebherr said. The manufacturer’s VarioBase system of optimising capacity according to the way the outriggers are set is included as standard.
With the 54 m boom and the front outriggers onboard it travels at 12 tonnes per axle. To minimise set-up time the rear outriggers are installed in one lift and use quick-release couplings. Configurations with loadings below 8 tonnes per axle are possible, the company said. At the other end of the scale in, for example, the UK where 16.5 tonnes an axle is permitted, the crane will travel with the 80 m boom, all outriggers and the boom guying system.
To keep the ballast radius as short as possible while maintaining performance, Liebherr included its VarioBallast system. As is the case on the new crane’s smaller sibling, the LTM 1450-8.1, the ballast radius of the new model can be infinitely adjusted using a hydraulic slewing mechanism. Its range of adjustment on the new model is between 6.3 and 8.4 m.
Power is from a carrier-mounted 505 kW Liebherr V8 diesel with a maximum torque rating of 3,160 Nm. It drives a 12 speed ZF TraXon Torque gearbox with torque converter clutch for smoothly pulling away from stationary and low speed manoeuvring. A new feature is EcoDrive which is a driving mode to save fuel and reduce noise when travelling. Also fitted is Hillstart Aid to make starting on gradients easier. An intarder on the gearbox acts as a retarder brake. There is also a Telma eddy current brake as standard.
For the crane side, a mechanical drive transmits power from the engine in the carrier via shafts and gearboxes through the centre of the slewing ring into the upper structure where it powers the hydraulic pumps for crane operation. It is similar to the other most recently introduced 230, 300 and 450 tonne tonne capacity models. For crane operation the engine has ECOmode to help minimise fuel consumption and reduce noise.
Width is 3 m and the overall length, including boom overhang and rear outrigger box is 20.707 m with 54 m boom and 21.477 m with the 80 m boom.
Author Alex Dahm for KHL.com
From the Liebherr site:
- LTM 1650-8.1 – designed for maximum performance
- Successor to the LTM 1500-8.1, the most successful large crane of all time
- 12 tonne axle load with 54 metre telescopic boom
- Sales begin at the time of Bauma
Liebherr unveils a new 8-axle mobile crane at the Bauma. The LTM 1650-8.1 is designed to deliver maximum performance. The new Liebherr mobile crane has large shoes to fill as it is the successor to the best-selling large crane of all time – with almost 600 units of the LTM 1500-8.1 have been delivered to date. The successful concept of the two telescopic boom versions is continued – the LTM 1650-8.1 is available with 54 and 80 metre telescopic booms.
As with all new developments over the last few years, Liebherr can offer the LTM 1650-8.1 with a very wide range of transport weights and axle load versions to ensure cost-effective global mobility for axle loads both above and below 12 tonnes.
Powerful, variable boom system
As with its predecessor, the LTM 1500-8.1, which dominated the large telescopic crane class for 20 years, Liebherr can supply the new crane with two telescopic boom lengths – 54 metres or 80 metres. Customers can also buy both lengths and change them easily by replacing telescope section 3 and roller head with telescope sections 3 to 5.
In keeping with the concept to deliver the ultimate crane on eight axles, the load capacity increases compared to its predecessor, are between 15 and 50 percent depending on whether the telescopic boom includes guying or not. The standard VarioBase® variable support base delivers additional increases in performance in the zone above the supports.
The designers used the time-tested technology from the LTM 1500-8.1 for the Y-guying of the new LTM 1650-8.1 – although they upgraded the single-rope system to achieve better performance, the benefit of easy handling was retained. The experts from Ehingen focused on achieving an easy, fast and safe set-up process during the design process.
A range of lattice booms enables it to work efficiently in a wide range of applications. With a fixed lattice boom from 6 to 62 metres in length, the telescopic boom can be extended particularly easily and quickly. It is attached at an angle of 0°, 10°, 20° or 40°. As an option, the fixed boom can be adjusted between 0° and 38°. The luffing lattice boom with a length of 21 to 91 metres delivers maximum height, radius and performance. Both lattice booms can be attached to the 54 metre and the 80 metre telescopic boom.
Greater flexibility of use with VarioBallast®
High performance normally requires a large ballast radius. But often there is simply not enough space on sites. This means the ballast radius must be as small as possible. Liebherr meets this challenge with its VarioBallast® innovation. The new LTM 1650-8.1 has adopted the time-tested system from the LTM 1450-8.1 – the ballast radius can be infinitely adjusted using a simple hydraulic slewing mechanism – on the LTM 1650-8.1 between 6.3 and 8.4 metres.
The new Liebherr 8-axle crane operates with a maximum ballast of 155 tonnes. To enhance economy, the ballast plates are compatible with the slabs from the LTM 1350-6.1, LTM 1400-7.1, LTM 1450-8.1, Liebherr’s 9-axle mobile cranes and the LR 1350/1 crawler crane. This means that all large LTM cranes have standard ballast slabs, a massive step forwards in logistics for crane operators.
The very latest chassis technology
An eight-cylinder Liebherr diesel engine in the undercarriage which develops 505 kW / 687 bhp and torque of 3,160 Nm provides the LTM 1650-8.1 with all the power it needs. The engine satisfies the new stage V emissions directive and can also be built to comply with the regulations which apply in countries outside of Europe, for example Tier 4f for the USA or stage III for low regulated countries.
The power is transferred to the crane axles using the innovative 12-speed ZF TraXon Torque gearbox. A torque converter enhances manoeuvring and starting. ECOdrive is a new feature. The additional eco mode delivers enhanced drive properties which both save fuel and reduce noise. Meanwhile, Hillstart Aid makes starting on gradients easier. The intarder, a zero wear hydrodynamic brake integrated in the gearbox, acts as a retarder. In addition a Telma eddy current brake is standard.
Time-tested single-engine concept with ECOmode
The Liebherr single-engine concept has now proven itself in over 800 cranes and also features on the new LTM 1650-8.1. The superstructure is powered by a mechanical shaft. Gear shafts are routed from the distributor gear in the substructure via two mitre gears through the centre of the slewing ring to the pump distributor gear in the superstructure.
A mechanical shaft ensures a particularly high efficiency level and low engine speeds in the chassis engine provide sufficient power for crane work. This ensures the economy of the new concept in terms of fuel consumption. The benefits of not having a separate superstructure engine include reduced maintenance work and lower weight. The lower weight can be used for load-bearing components, thus increasing the crane’s load capacity. In ECOmode the complete pump drive can be disconnected automatically when the engine is idling and then reconnected by the intelligent controller in a matter of seconds when it is required.