Liebherr L 521 10t 1988-1998 - Technical data

LIEBHERR D 904 TB - Product Description

Powertrain and Design

The machine is powered by a LIEBHERR R D 904 TB diesel engine. It delivers an output of 77 kW (105 ch) at 2000 rpm and 112 hp (max. BHP) at 2000 rpm. The engine is water-cooled and turbocharged. Additionally, it features a 205 l fuel tank and an air filter with a separation system. The electrical system operates at 24V with two 98 Ah batteries.

Undercarriage and Hydraulics

The hydraulic system consists of a closed hydrostatic transmission, utilizing automatic gear shifting in two ranges. It is equipped with a variable displacement pump that feeds the hydraulic motor and features filters in the supply lines. In case of engine failure, a hydraulic accumulator is available to maintain operational safety. The steering system is hydraulic with proportional actuation relative to the steering wheel's rotation.

Operating Parameters

The machine has an overall length of 4990 mm, a width of 2400 mm, and a height of 2700 mm. The turning radius is 2650 mm and the ground clearance reaches 2000 mm. The permissible working weight with a bucket is up to 9143 kg, with a total operational weight of 9630 kg. It achieves a nominal lifting force of up to 100 kN in standard configuration.

Optional Equipment

The standard equipment includes lifting arms with a length of 2350 mm and various types of tires, including for construction applications. Additional accessories such as hydraulic quick couplers and systems for mounting fork grabs are also available. This provides flexibility for various technological applications.

Safety and Technical Data

The machine is equipped with a ROPS and FOPS safety cabin, compliant with ISO standards. Additional safety systems include multi-disc hydraulic brakes with oil cooling, ensuring reliability and no user adjustments needed. Additionally, special seals are employed in the pivots to enhance durability and efficiency of the system.