Lorain MC-7125

The Lorain MC-7125 is a powerful 125 US ton lattice boom truck crane, engineered for versatility and strength in heavy-duty lifting applications. With a square tubular chord boom design, it offers a preferred structure for stability and high load capacity. The crane comes with three boom peak configurations: offset, tapered, and hammerhead, catering to different project needs. The main boom can extend up to 300 feet when combined with jib attachments, providing significant reach for tall structures or deep lifting tasks.

This crane features a dual drum hoist system, with tandem hoist drums that offer enhanced spooling capacity and smooth operation. The winch and hoist systems are powered by metered air controls, providing precise control over load lifting and positioning. The enclosed all-gear drive ensures efficient power transmission, and the independent hydraulic swing system delivers smooth slewing actions for better positioning of loads. The crane also offers a 10-year warranted “Shear-Ball” turntable connection, ensuring durability and reliability in its rotational components, critical for heavy and continuous operations.

Powering the Lorain MC-7125 is a Cummins N-855-C 6-cylinder diesel engine, delivering 210 horsepower via a torque converter. The engine has a displacement of 855 cubic inches and comes with a 75-gallon fuel tank, offering sufficient fuel capacity for extended operation times. The crane’s hoist and derricking clutches are air-powered, ensuring smooth operation and control during heavy lifts.

The Lorain MC-7125 has a double reduction gear drive in the rear bogie with planetary axles, ensuring that the crane can efficiently handle high-torque demands. The front tires measure 17¼ inches in diameter, while the rear tires are 20¼ inches, offering durability and stability when traveling or lifting on various terrains. The crane has a turning radius of 67 feet (to the front corner of the vehicle), enhancing maneuverability in tight spaces on construction sites.

The boom configuration offers a range of options to suit different project needs. The standard boom peaks include:

• Offset peak boom: 40 feet (25 ft. base, 15 ft. peak)
• Hammerhead peak boom: 28 feet (25 ft. base, 3 ft. peak)
• Long tapered peak boom: 60 feet (25 ft. base, 35 ft. peak)

These peaks, along with the optional jib sections (30 ft. with extendable options of 10 ft. and 20 ft. sections), provide versatile configurations for different lifting heights and radii. The boom hoist features telescopic-type boom stops, ensuring safe operation even when working at high boom angles.

In terms of controls, the crane uses a metered air system for precise hoisting and derricking. The swing system is fully hydraulic, independent of the other controls, allowing the operator to perform simultaneous actions efficiently. The counterweight on the crane, which weighs 22,000 lbs, is equipped with a hydraulic kit for easy removal during transport or setup.

Safety features include multiple hoist line sheaves at the boom peak on anti-friction bearings, ensuring smooth and reliable hoist line movement. The crane also offers advanced braking systems, with both front and rear brakes powered by a spring-set system for emergency and parking needs.

The Lorain-built carrier provides an integrated design optimized for the crane’s weight and operational requirements, allowing for easy transport and weight reduction when necessary. The crane’s weight can be reduced by up to 22,000 lbs by removing the counterweight and other non-essential components for road travel, ensuring compliance with transportation regulations.

In conclusion, the Lorain MC-7125 is a heavy-duty lattice boom truck crane built for demanding lifting tasks. Its powerful engine, extensive boom and jib combinations, advanced controls, and robust safety features make it ideal for construction, infrastructure, and industrial projects that require high lifting capacities and precision.