MacLean takes another mining vehicle solution around the hard rock globe

Jackson Chen | February 23, 2022 | 9:32 am News Canada 
MacLean GR5 grader. Credit: MacLean Engineering.

With the first-ever MacLean GR5 underground road grader already shipped to Africa and additional units scheduled for factory production, the newest addition to the MacLean Engineering line of Mine-Mate utility vehicles, which offers up a ruggedized, high performance mobile solution for maintaining haulage ramps in optimal condition, is ready to be introduced to the mining world.

The GR5 mining vehicle is an evolution for MacLean, starting back in 2018 when the company collaborated with the specialty engineering firm Medatech to retrofit a battery electric grader for Borden gold mine in northern Ontario (then owned and operated by Goldcorp). Based on the engineering and manufacturing learnings from this one-off custom project, MacLean embarked on a collaborative process to better understand the grader vehicle category, so that it could be successfully adapted from road to underground mining applications.

Working closely with road grader industry professionals from a former Canadian grader OEM with decades of respected industry expertise, MacLean went back to the drawing board to develop a fit-for-purpose design for the underground environment. While most products in this category tend to be considered too lightweight for the work, the GR5 is purposely sized to match the tractive effort and drawbar pull of full-sized surface graders. The unit features a CAN bus control system that allows joystick control technology to be deployed for both steering and application functions simultaneously to ease operator comfort and control, while also boasting an onboard vehicle telemetry package that can monitor the performance and health of the vehicle. On the powertrain side, the unit can be either battery electric or diesel-powered, and comes equipped standard with a six-wheel infinitely adjustable drive system using dual hydrostatic motors and active traction control.

Size, maneuverability, visibility, simplicity, and ruggedness were key design factors. As a result, the unit is similar in height to the rest of the MacLean Utility Vehicle product line, designed to work optimally in 5m x 5m headings. The unit’s design also includes a combination of frame articulation and front wheel-steering, which minimizes its turning radius underground and its moldboard system uses a simpler design than its surface grader counterparts to ensure durability and reliability. 

“The product development approach on this unit is a great example of what we like to call MacLean ‘Application Intelligence’, where we take our mobile equipment engineering expertise and combine it with our knowledge of the mining environment to design units that are fit for the job they need to do underground,” adds David Jacques, vice president of engineering at MacLean. “We truly believe we’ve ‘made the grade’ and developed a winning product that leverages our core knowledge of the underground environment and combines it with application knowledge from grader design experts to address the actual needs of the mining industry – it all comes back to our Application Intelligence.”

More information can be found on www.MacLeanEngineering.com.

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