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The Komatsu PC45MR-5 (commonly referred to in
queries as the PU45MR-5) is a 4.9-ton mini
excavator engineered to bridge the gap between
compact agility and large-machine performance.
Built specifically for tight residential,
utility, and urban job sites, its key selling
points center around maneuverability, updated
geometry, and ease of ownership. True Tight-Tail
Swing: The “MR” (Minimum Radius) design ensures
the counterweight barely extends past the tracks
during full rotation. Operators can rotate 360
degrees flush against a foundation wall, fence,
or obstacle without risking rear impact.