Liebherr LTM1750-9.1

The Liebherr LTM 1750-9.1 is a heavy-duty all-terrain mobile crane, initially launched with a lifting capacity of 750 tonnes and later upgraded to 800 tonnes. The crane was showcased at the 2013 Bauma show in Germany and quickly gained popularity, with over ten units ordered shortly after its debut. The crane is built for high performance in both on-road travel and complex lifting operations on site, combining compact dimensions with superior lifting capabilities.

The carrier consists of a 9-axle configuration (18 wheels), with hydro-pneumatically suspended axles and automatic leveling. Axles 1 to 4 and 6 are equipped with planetary gears, while axles 5 and 6 feature transverse differential locks. Axles 3 and 5 have longitudinal differential locks. The steering system is a 2-circuit hydraulic servo design, enabling active rear axle steering based on speed and load, which significantly enhances maneuverability.

The power for the crane carrier is delivered by a Liebherr 8-cylinder diesel engine producing 500 kW (680 hp) with a maximum torque of 3000 Nm. It complies with EU Stage IV / US EPA Tier 4 Final emissions standards (97/68/EG and EPA/CARB). The transmission is a ZF TC-TRONIC HD with 12 forward and 2 reverse speeds, including torque converter and transfer differential.

For lifting operations, the crane is equipped with a 52-meter telescopic boom, extendable in 1 m increments using a telescopic extension system (TELEMATIK), and optional fixed jibs (10 to 62 m) or luffing jibs (21 to 91 m) for extended reach and higher lifting flexibility. The hoisting system uses axial piston variable displacement motors and integrated planetary gears for high-efficiency lifting operations. The slewing system is powered by 3 axial piston motors with planetary gearboxes.

Counterweight options include a total of 204 tonnes, composed of various configurations including a base plate, central weight, and additional modular ballast elements. The crane also offers various optional equipment like a 2nd and 3rd hoist gear with luffing jib, guying system for telescopic boom, and eccentric V2 1.5 m extensions for versatility in different lifting conditions.

The superstructure is powered by a 6-cylinder Liebherr diesel engine integrated into the counterweight frame, producing 270 kW (367 hp) and 1720 Nm torque. It includes a 5 axial piston variable displacement pump for crane functions, with servo-control and capacity control for efficient power distribution.

Control is facilitated by two self-centering joysticks and a modern bus system for precision. Safety features include LICCON2 load moment indicator, test systems, and multiple safety valves to ensure secure operation under demanding conditions. The crane cab provides ergonomic features such as a rotating seat, comfort interior, and air conditioning, ensuring operator comfort for long shifts.

Overall, the Liebherr LTM 1750-9.1 (upgraded to LTM 1750-8.1 in naming convention after capacity upgrade) is a technologically advanced and versatile heavy lift crane, well-suited for challenging construction, industrial, and wind power applications where high capacity and long reach are essential.

Milestones – Liebherr LTM 1750-9.1

• First Unit Delivered: The inaugural LTM 1750-9.1 was delivered to Schot Verticaal Transport in Alkmaar, the Netherlands, marking the start of the model’s global journey.
• First in the Middle East: In 2013, Al Faris became the first owner of the LTM 1750-9.1 in the Middle East, bringing high-capacity lifting solutions to the region.
• First in Spain: Also in 2013, Grúas Aguilar introduced the LTM 1750-9.1 to Spain, expanding the crane’s footprint in Southern Europe.
• First in Singapore: In 2014, Moh Seng Cranes acquired the first unit in Singapore, showcasing the crane’s appeal in Southeast Asian markets.
• First in North America: Northwest Crane Service became the first North American operator of the model in 2014, underlining its suitability for large-scale lifting in diverse conditions.
• First in Mexico: The first unit in Mexico was purchased by GMVykon in 2015, expanding the model’s presence in Central America.
• 100th Unit Delivered: A major production milestone was reached in 2016 when the 100th unit of the LTM 1750-9.1 was delivered to Dufour Transports et Manutention SA in Belgium, highlighting the model’s global popularity and success.
• First in Russia: In 2017, TOPKRAN received the first LTM 1750-9.1 delivered to Russia, further strengthening Liebherr’s presence in Eastern Europe.
• Largest Crane in Finland: The model earned the distinction of being the largest crane in Finland, operated by J. Helaakoski Oy, purchased as a used unit from Liebherr, emphasizing its long-term value and operational longevity.