The Liebherr LR 1400 is a powerful crawler crane renowned for its exceptional capabilities. With a maximum lifting capacity of 440 tons and a versatile boom system that extends up to 390 feet, it excels in handling heavy loads. What sets it apart is the integrated crane application planner, which intelligently determines the optimal boom configuration and lift capacities for enhanced efficiency and safety. Liebherr offers upgraded versions like the LR 1400/1 and 1400/2, as well as the specialized narrow track model 1400-W, designed specifically for wind turbine construction. The LR 1400 undercarriage installation is a complex process due to the crane’s powerful performance and the multitude of components involved. However, this intricate design ensures its ability to move steadily and reliably, making it a trusted choice for demanding lifting operations.
the components of Liebherr lr 1400 undercarriage
The undercarriage of Liebherr LR 1400 consists of several key components:
These large metal plates are attached to the crawler crane undercarriage and make direct contact with the ground, providing traction and stability during movement.
Central Part
Serving as the core structure of the crawler crane undercarriage, the central part connects various components, such as the track frames, and provides overall stability and support.
Crawler Transmission System
This system includes gears, drive motors, and other mechanical components that enable the crawler crane to move smoothly and efficiently across various terrains.
Central Counterweight
Positioned at the center of the undercarriage, the central counterweight helps balance the weight distribution of the crawler crane during lifting operations, enhancing overall stability.
Hydraulic Legs
These hydraulic cylinders can be extended or retracted to adjust the height of the crawler crane, allowing it to adapt to uneven surfaces and maintain stability during lifting and working.
Mechanical Additional Legs
Complementing the hydraulic legs, these mechanical legs provide additional support and stability to the crawler crane during heavy lifting tasks, ensuring safe and controlled operations.
The installation of Liebherr lr 1400 undercarriage
When it comes to installing the undercarriage of the Liebherr LR 1400 crawler crane, meticulous attention to detail and precise execution are essential. The Liebherr undercarriage plays a crucial role in providing stability, mobility, and support to the entire crane structure. Proper installation ensures optimal performance and safe operation during lifting tasks.
Transport weight and center of gravity weight
The transport weight and center of gravity weight of the Liebherr LR 1400 crawler crane include various components. These are:
Installed Winch + Wire Rope: The weight of the installed winch and the accompanying wire rope is considered in the overall transport weight and center of gravity calculations.
A-Frame and Installation Cylinder: The A-frame, used for lifting and positioning heavy loads, along with the installation cylinder, adds to the total weight and affects the center of gravity of the crane during transport.
Anti-Tipping Cylinder: The anti-tipping cylinder, designed to prevent the crane from tipping over during operation, is also factored into the transport weight and center of gravity calculations.
Supporting Rotary Platform: The weight of the supporting rotary platform, which allows the crane to rotate horizontally, is taken into account when determining the transport weight and center of gravity.
Rotary platform weight parameter (p1)
Crane belt quick connection | Weight/t | Center of gravity/mm | A/t | B/t |
winch Ⅳ+ steel wire rope | 31.3 | 2672 | 17.1 | 14.2 |
winch I+V+ steel wire rope | 35.5 | 2510 | 20.1 | 15.4 |
winch I, Ⅱ + Ⅳ +steel wire rope | 39.7 | 2456 | 22.9 | 16.8 |
winch VI, I, Ⅱ, Ⅳ + steel wire rope | 43.9 | 2180 | 26.9 | 17.0 |
Rotating platform with track mounting body parameter (p2)
Crane belt quick connection | Weight/t | Center of gravity/mm | A/t | B/t |
winch Ⅳ+ steel wire rope | 47.5 | 1761 | 31.5 | 16.0 |
winch I+V+ steel wire rope | 51.7 | 1452 | 36.4 | 15.3 |
winch I, Ⅱ + Ⅳ +steel wire rope | 55.9 | 1745 | 37.3 | 18.6 |
winch VI, I, Ⅱ, Ⅳ + steel wire rope | 60.1 | 1598 | 41.2 | 18.9 |
Step 1: Installing the Liebherr lr 1400 undercarriage attachments
Place the slewing platform and track mounting body on the foundation: Using an auxiliary crane, lift the slewing platform and track mounting body from the transport vehicle and carefully position them on the foundation. Be mindful of the weight specifications mentioned in the chart. Ensure that the track mounting body is adjusted to a level position.
Move the leg to the operating position: Adjust the leg to the operating position as shown in P4. Remove the transport safety plate and turn the support to the installation position. Secure the pin in place using the elastic pin for added safety.
Step 2: Lift the A-frame
Ensure the wire rope for hoisting the V-adjusting boom is properly wound in. Start the engine and activate the “Mount” switch and the track mount switch. This will turn on the “Track and Boom Mount” indicator lights. Set the “Likon” system to the desired operating condition. Use the key switch when activating the handle. Caution: Activating the track mounting switch will disable the mounting cylinder and crane overload safety protection, posing a risk of accidents.
Working as follow:
- Set the ball valve of the Liebherr LR 1400 to the “down” position, allowing the A-frame of the LR 1400 to be pushed upward by the anti-tipping cylinder until the wire rope between the A-frame and the rotating platform block is taut.
- Adjust the ball valve to the “up”, “vertical”, and “down” positions, gradually lowering the A-frame of the Liebherr LR 1400 to the rotating platform’s transportation position. Lock the piston rod expansion in the working position of the LR 1400.
Caution: Conduct a visual inspection to ensure the accurate alignment of the wire rope in the respective wire rope pulleys. Secure the ball valve in the working position of the LR 1400. - Start the operation handle of the Liebherr LR 1400 to release winch I IV. As the cylinder of the Liebherr LR 1400 extends upward, push the A-frame upward until it rises to an angle greater than 90°.
Step 3: Install undercarriage with A-frame
- Position the first undercarriage of the tracked transporter as close to the intermediate as possible.
- Swing down the A-frame and rotate the rotary platform to align the cylinder directly above the track.
- Remove the spring pin and transport pin.
- Lay out the mounting plates on both sides and securely fasten them with a fixed tie rod.
- Extend the mounting cylinder and use bolts on the discharge to secure the chain for the crawler to the mounting plate.
Caution: Take precautions to avoid overhanging track plates and ensure the installation of a transport safety chain. Additionally, use a wire rope protection device for the upper track plate. - Utilize the track mounting cylinder to lift the track from the vehicle.
Note: Flip the “Installation” switch and the “track installation” switch using the key, which will activate the corresponding indicators.
safety warning
- Take note that the track weighs approximately 28 tons. Pay attention to the marks on the tracks and joints during the installation.
Danger: Exercise caution to prevent exceeding the maximum working radius while lifting the Liebherr crane track. Monitor the pendulum display on the A-frame, ensuring it remains within the green angle range to avoid the risk of crane tipping. - Remember that once the key switch is activated, the installation cylinder and the crane will lack overload safety protection. This disconnects the security protection system, leading to potential accidents.
step 4: install the second undercarriage
- Ensure the first installed track is on the ground and the support jack is fully retracted before turning the rotary platform to avoid tipping the crane.
- Pay attention to the pendulum indication on the A-frame, keeping it within the green angle range (approximately 61°-75°) to prevent crane instability.
- Note that once the key switch is flipped, there is no overload safety protection for the installation cylinder and the crane.
- Follow the same procedure used for the first track installation when installing the second track.
- Securely swing back the mounting plate and align the screw joint.
- Lower the second track to the ground by retracting the support cylinder.
- Close the ball valve handle horizontally and fully retract the leg cylinder.
- Cut the pressure transfer switch in the driver’s room.
- Retract the mounting cylinder and switch off the “Track and Boom mounting” light using the button.
- Connect the hydraulic line to the two tracks using the identified quick plug couplings.
- When connecting or disconnecting hydraulic lines, carefully follow the connection specifications to avoid accidents.
conclusion
Installing the undercarriage of the Liebherr LR 1400 in the correct manner is vital to ensure its safe operation. At Value Crane, we understand the importance of proper installation and offer our expertise as a professional Liebherr crane parts supplier. If you have any further questions or concerns regarding Liebherr crawler cranes, please don’t hesitate to contact us. We are well-equipped to address any issues and provide comprehensive solutions. Count on Value Crane for all your Liebherr crane needs.
