A tight-tail machine designed for operators

Built on the foundation of the PC138USLC-11, the PC158 will be slightly heavier and available in two versions: a standard PC158USLC-12 without IMC 3.0 and the PC158USLCi-12 with IMC 3.0. Preliminary operating weight, which may change at launch, is 35,715 pounds.

Komatsu has moved to EH controls with its -12 excavators, which facilitates easier technology integration. Track steering, programmable buttons, swing priority settings, and work speed settings are all more easily incorporated with EH controls. The operator can also customize the controls to match their operating style, reducing fatigue and increasing efficiency.

Beyond the controls, attention to the operator experience is vital, says Barr. When operators don’t like something, they’ll say it. He saw strong, positive reception to Komatsu’s switch from a sliding door to a swing-open door at CONEXPO and notes that addressing these preferences, even if they seem like minor details, is important to the operators who use the equipment every day.

Barr is also impressed by the comfort improvements that have been incorporated across Komatsu’s recent equipment launches. The PC158’s new wide-profile cab with increased visibility has a multifunction seat that is adjustable to give operators plenty of options.

“Everyone’s built differently,” he says, “and the different seat adjustments and positioning can make operators of all sizes comfortable.”

For contractors seeking a machine with some advanced technology, but not the whole 3D package, the standard version of the PC158 includes 2D grade control, 2D boundary control (boundary control tied to the machine, rather than job site GPS coordinates), bucket payload monitoring, KomVision 360° with human and object detection, an 8-inch touchscreen, and joystick travel.

The equipment landscape is competitive, and that standard technology package for the base machine will deliver value to contractors, says Barr. “There’s nothing better than having 2D when digging a basement. You set the benchmark, you cut it down however many metres you need, then you move around that. It’s perfect every time.”

Advanced technology for more applications

With the PC158USLCi-12, Komatsu has stepped up to offer advanced automation on a smaller platform, and Barr is thrilled to introduce it to Canadian customers later this year. He expects the machine to do particularly well in Canada on utility and residential job sites.

“It’s hitting that need for a grade control machine that can work in tight quarters. Those customers who need that compact unit will have the full benefit of Komatsu’s most advanced excavator technology.”

This article originally appeared in the May/June 2026 issue of Heavy Equipment Guide.