About · Komatsu PC40Overview
The Komatsu PC40 is a mini-excavator in the 4-tonne class, operating at 4,337 kg and rated at 38 hp. It is equipped with a 0.13 m³ bucket, placing it firmly in the compact excavator segment suited to confined or access-restricted worksites. As a Komatsu product, it carries the build standards and parts network associated with one of the largest OEM manufacturers in the earthmoving sector.
Typical applicationsWhere this machine is used
Machines of this class are routinely deployed on utility trenching, landscaping, drainage installation, and foundation work in urban or suburban environments where site access limits the use of larger equipment. The PC40 weight and reach envelope also make it suitable for indoor demolition and basement work where overhead or floor-load constraints apply. Agricultural and small-scale civil contractors frequently operate machines in this category for tasks that fall between the capability of a micro-excavator and a mid-size unit.
Used-market inspectionWhat to check before buying
Inspection of any used mini-excavator in this class should prioritise undercarriage condition, as track wear, sprocket condition, and idler wear are significant cost drivers that are not always visible in listing photographs. Hydraulic system integrity warrants close attention, including checks for drift on the boom, arm, and blade circuits, and inspection of hose and fitting condition throughout. Engine oil and coolant condition, together with any history of overheating, should be reviewed alongside available service records. On a machine of this operating weight, slew ring play and bearing condition are worth assessing in person, as replacement represents a substantive undertaking. Buyers should confirm that any listed attachments include the correct hydraulic configuration and that quick-coupler systems are compatible with the intended tooling inventory.
Current marketPrice position
The Komatsu PC40 is cross-shopped primarily against the Kubota KX040 and the Kubota KX121. The KX040 shares a comparable operating weight class, making it a direct point of comparison on digging performance and site footprint. The KX121 sits in a slightly higher weight bracket, and buyers moving between the two typically weigh the difference in reach and lift capacity against the tighter access profile that the PC40 offers. Within its own price band, a PC40 unit moves up or down based on recorded operating hours, the presence and condition of additional attachments such as hydraulic thumb or tiltrotator, overall mechanical condition including undercarriage wear, and configuration factors such as cab versus canopy and blade type. Provenance, service documentation, and geographic availability of parts support also influence where an individual machine sits relative to others in the same model category.