About · Komatsu D61PXOverview
The Komatsu D61PX is a mid-size crawler bulldozer in the 17,800 kg operating weight class, producing 168 hp and carrying a blade capacity of 3.7 cubic metres. It has been in continuous production since 2008, establishing a long parts and service history. The PX designation indicates an extra-wide, low ground pressure undercarriage configuration, making it a specialist tool where flotation and minimal ground disturbance are priorities.
Typical applicationsWhere this machine is used
Machines in this weight and power class are well suited to grading, land clearing, push-loading, and site preparation work on medium to large construction and civil engineering projects. The D61PX's wide undercarriage extends its usefulness to softer or more sensitive ground conditions, including wetland reclamation, forestry work, and agricultural land development where a standard-gauge machine would sink or cause excessive surface damage. Pipeline and utility corridor work, where straight-line dozing capacity and ground stability matter, also falls within its typical operating envelope.
Used-market inspectionWhat to check before buying
On any used crawler bulldozer in this class, undercarriage inspection is the single most consequential step, as track components represent a substantial portion of any refurbishment budget. Measure wear on track shoes, links, rollers, idlers, and sprocket teeth directly, and ask for the most recent undercarriage wear report if one exists. Inspect the blade cutting edge and end bits for wear, and check push-arm and tilt-cylinder mounting points for cracks or repair welds. Engine hours should be verified against service records rather than taken from the display alone. On the D61PX specifically, examine the wide undercarriage frame for impact damage or bent components, which can occur in rocky ground conditions despite the machine being optimised for soft terrain. Request a hydraulic function check covering blade lift, tilt, and any auxiliary circuits. A full fluid analysis for engine oil, hydraulic oil, and final drives will identify internal wear before it becomes visible externally. Machines with documented dealer or factory service histories and continuous ownership records carry lower verification risk than those with gaps in their maintenance documentation.
Current marketPrice position
The D61PX sits in the mid-size bulldozer segment, directly cross-shopped against the Case 1650 and the Caterpillar D6N. Compared with the Case 1650, the Komatsu offers a higher operating weight and greater blade capacity, positioning it toward the heavier end of this competitive bracket. Against the Caterpillar D6N, the D61PX's distinguishing factor is its wide low-pressure undercarriage, which the standard D6N does not offer in equivalent form, giving the Komatsu a specific technical advantage on soft ground applications. Within the used market, value spread for any individual machine is driven primarily by accumulated operating hours, overall undercarriage condition, blade and push-arm wear, whether the machine carries factory-optional equipment such as GPS or slope control, geographic service history, and the availability of documented maintenance records.