We carry the full range of Komatsu 3D88 engines for the PC55MR-3 - new surplus and rebuilt, mechanical and electronic - and we build each core to the configuration your mini excavator needs.
The Komatsu PC55MR-3 is a 5.5-ton class short tail-swing mini excavator. CYLINDER COUNT WARNING: this size class spans both the three-cylinder 3D88E and the four-cylinder 4D88E. Komatsu's own parts data lists 4D88E applications in the PC55MR-3, so the data plate is the only reliable source. We will confirm it for you before anything ships.
ENGINE SPECIFICATION. Three cylinder, four cycle, water cooled, vertical in-line. Direct injection, naturally aspirated. Bore and stroke 88 x 90 mm. Displacement 1.642 L (100.2 cu in). Around 36 hp at full rated speed, less in machines governed lower. Dry weight approximately 341 lb (154 kg). Engine as fitted to this machine: Komatsu 3D88E. Production years: 2008-2016. Rated output in this machine: approximately approx. 36-40 hp.
KOMATSU 3D88 AND YANMAR 3TNV88 ARE THE SAME ENGINE.
Komatsu's small D-series diesels are Yanmar TNV engines built under the long-standing Komatsu-Yanmar relationship and badged as Komatsu. The Komatsu 3D88 / 3D88E is the Yanmar 3TNV88: same block, same crankshaft, same 88 x 90 mm bore and stroke, same 1.642 L displacement, same architecture. If your data plate reads 3D88E-3, 3D88E-5, 3D88E-6 or 3D88E-7, that is a Komatsu-badged Yanmar 88 mm three-cylinder.
This matters commercially because it doubles the pool of engi