Komatsu PC60-3(S/N 18001-UP)

The Komatsu PC60-3(S/N 18001-UP) is a compact hydraulic crawler excavator in Komatsu's roughly 6-tonne (13,200 lb) class, built for general construction, utility work, and digging in tighter sites than a standard excavator needs. This serial range runs the 4D95L-1, also cataloged as 4D95L-1C, a naturally aspirated, water-cooled, direct-injection 4-cylinder diesel with a mechanical inline injection pump and no electronic engine controller, paired with a gear-type main hydraulic pump rather than a variable-displacement piston pump. The PC60-3 sits in Komatsu's numbering gap between the PC60-2 (1984-1987) and the PC60-5 (1987-1997), placing its production in the mid-to-late 1980s as a short-lived generation; an exact factory weight and horsepower rating for this specific serial block are not independently published, so confirm against the machine's own nameplate before quoting a figure. Komatsu offered this generation in at least two undercarriage configurations sharing one parts book: the standard-track PC60-3 and the longer, wider-track PC60L-3 built for soft-ground work.

Across PC60 generations, Komatsu kept the 4D95-family engine block in service through the -5, -6, and -7 series while adding turbocharging and progressively more capable hydraulics and cab electronics in later models; this dash-3 generation predates all of that, running purely mechanical fuel injection with analog gauges and warning lamps instead of any fault-code system. That mechanical simplicity is the draw in today's used and parts market: nothing on the machine needs a scan tool to diagnose, and its known wear points — final drive and swing motor shaft seals, swing brake release valves, and track chains that stretch and loosen the adjuster — are well understood, straightforward repairs rather than electronic guesswork. Parts support leans on the shared 4D95 engine family and PC60-platform undercarriage and hydraulic components carried across the later -5 and -6 generations, which keeps a genuinely obscure, older machine serviceable decades after it left the factory.

Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.