Lorain MC-670

The Lorain MC-670 is a versatile 70-ton capacity lattice boom truck crane, engineered to meet the demanding needs of large-scale construction and industrial lifting operations. It features a square tubular chord boom structure for strength and stability, making it capable of handling heavy loads with precision. The crane is designed with ease of transport and setup in mind, offering features like removable counterweights, outrigger systems, and a modular design that allows for reduced travel weight.

One of the key benefits of the MC-670 is its lower travel weight, making it a highly mobile crane that is easy to transport between job sites. Despite being a powerful 70-ton machine, the MC-670 weighs less than most cranes in its class. For further weight reduction, components such as the removable counterweights can be hydraulically disengaged and transported separately. The counterweight system is easily unlocked with a single pin and pushed down a wedge ramp onto the carrier, enabling quick transfer to a truck for transport.

The crane is equipped with removable outriggers, allowing for faster setup and more versatile transport options. These Power-Set outriggers feature beams that can be removed or retracted using quick disconnects, and the hydraulic lines can be easily disconnected. The front outrigger unit is skidded out with the hoist line, while the carrier drives away from the rear one. This design allows contractors to save time during setup and removal, increasing productivity.

The dual drum boom hoist system on the MC-670 ensures efficient and balanced lifting. Each end of the hoist cable is attached to separate drums that rotate in unison, equalizing the pull on the boom tip and extending the life of the cable. The drums are grooved to ensure smooth wrapping, and the boom hoist brake is spring-loaded for added safety. An additional third drum with a large diameter of 10¾ inches is available, capable of holding 470 feet of ⅝-inch cable, providing power load lowering on both hoist and boom operations.

All-new clutch systems ensure smooth operation, with six independently metered, air-controlled clutches for quick and precise adjustments. These clutches are easily accessible and serviced from the side frames, reducing downtime during maintenance. The spring-loaded swing lock ensures stability during operations, while the air-assisted swing system offers smooth and positive control.

The operator’s cabin in the MC-670 is designed for comfort and efficiency, with air-controlled systems for precise management of all crane functions. The cabin layout is ergonomically designed with side-mounted levers and ample knee room for ease of control, ensuring the operator remains comfortable during extended periods of operation. The separate operator’s compartment offers a quieter, safer environment by isolating the operator from the rest of the machinery, improving focus and reducing noise levels.

The crane also features Power Gantry controls that allow the operator to raise or lower the gantry without leaving their seat. This system enables quick setup for heavy lifts and ensures the crane is ready for transport when lowered, providing minimum clearance for road travel. The power gantry is locked and unlocked using air power for added convenience.

The MC-670’s Power-Set outriggers are designed for simplicity, safety, and ease of use. These outriggers feature an automatic wedge lock that secures the beam without relying on hydraulic systems, reducing the number of parts and connections required for setup. Additionally, the crane offers Verti-Power Set outriggers, which provide vertical motion to each outrigger beam, allowing for infinite positioning along the vertical axis. This system eliminates the need for manual locking mechanisms and enhances safety during leveling on uneven terrain.

In summary, the Lorain MC-670 is a powerful 70-ton lattice boom truck crane that combines strength, mobility, and ease of use. Its advanced features, such as removable counterweights, dual drum boom hoist, and power gantry system, make it an ideal choice for contractors who require fast, efficient setup and transport options without compromising on lifting capacity.