The Komatsu D61EX-24: A Mid-Size Dozer Built for Firm Ground and General Dozing

Komatsu's D61 class gets most of its attention through the PX and PXi variants, the wide-gauge, low-ground-pressure machines built for soft ground and, in the PXi's case, factory grade control. The D61EX-24 is the standard-gauge sibling that doesn't get talked about as much, and that's a mistake for any contractor working firm, established ground where the PX's extra width isn't buying anything.

The Real Numbers

The D61EX-24 runs 168 HP at 2,200 rpm, with an operating weight of 40,830 lbs and a blade capacity of 4.41 cubic yards. It carries a hydrostatic transmission with electronic controls for automatic shifting and variable speed selection, a power angle tilt blade with adjustable pitch, and a new H mode built to help the operator maintain ground speed under heavy load. Komatsu lists an additional 5 percent fuel consumption reduction over the prior model generation on top of those mechanical updates.

EX vs. PX: The Distinction That Actually Matters

Across Komatsu's dozer lineup, the letter codes aren't arbitrary. PX models run a wider track gauge for lower ground pressure, built for soft, loose, or wet ground where a narrower machine would struggle for traction or sink in. EX models run the standard gauge, built for firmer, more established ground where that extra width isn't doing useful work, trading it instead for a narrower, more maneuverable frame. The D61EX-24 is Komatsu's standard-gauge answer in the mid-size class, and it's the better choice on compacted pads, gravel lots, and general grading work on soil that's already stable, not the soft, unpredictable ground the PX variants are built for.

Why Narrower Still Wins on the Right Ground

A narrower, standard-gauge machine isn't a compromise on firm ground, it's the better tool. It's generally more maneuverable in tighter work areas, and there's no reason to pay for and haul around the extra structural weight a wide-gauge PX variant carries if your ground conditions don't call for the lower ground pressure that weight exists to provide. Buying a PX-class machine purely because it's the "upgraded" sounding option, when your jobs are consistently on firm, established ground, is paying for a capability you don't need.

Who Should Actually Buy the EX Variant

General contractors and grading subs working established commercial and residential pads, roadways, and compacted sites get the most value from the D61EX-24's standard-gauge maneuverability. Quarry and aggregate operations working on firm, well-drained yards benefit from the lighter structural footprint relative to a PX-class machine at the same horsepower. Site-development contractors whose jobs run predictably on stable ground, rather than the soft or wetland-adjacent conditions a PX machine is built for, are exactly the buyer this variant was designed for.

The Rent-vs-Own Case for Matching Gauge to Ground

Rental yards don't always stock both the EX and PX configurations side by side, which means a contractor who needs the standard-gauge machine specifically can end up stuck with whatever variant happens to be on the lot, paying for ground-pressure capability they don't need or working with a frame that's wider than their site actually requires. Owning the configuration that actually matches your typical ground conditions means that mismatch never happens.

BFC finances Komatsu's full dozer lineup, including both the D61EX-24 and its wide-gauge D61PX and D61PXi siblings, for startups and established businesses nationwide, on good credit or bad. Matching the right configuration to your actual ground conditions, rather than defaulting to whichever variant a rental yard has available, is the kind of decision that pays off every single day the machine is on a job.

For more on Komatsu's D61 class, see our comparison of the D51PX-24 against the D61PXi-25, our coverage of the D61PXi-25's IMC 3.0 upgrade, and our explainer on KOMTRAX telematics and resale value.

Finance a D61EX-24 Matched to Your Ground Conditions

Ready to add a D61EX-24 or any other Komatsu dozer to your fleet? Visit our home page to learn more, or go straight to our equipment financing application to get started. Looking to buy or sell equipment outright? Browse our equipment for sale inventory. And for more coverage like this, subscribe to our blog.