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Komatsu PC78MR-6

Series: Komatsu Midi Excavator

Source: https://www.komatsu.eu/de/alte-modelle/kompaktbagger/pc78mr-

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The Komatsu PC78MR-6 is a model in the Komatsu Midi Excavator series. The engine delivers 40.3 kW, has 4 cylinders, with a displacement of 3,261 cm³. Rated speed is 1,850 rpm. The unladen weight is 8,270 kg. Ground clearance is 362.7 mm. The tank holds 125.3 litres. The pump delivers 160.1 l/min. The hydraulic tank holds 110.2 litres. Working pressure is 264.8 bar. The cooling system holds 10.6 litres. The oil fill is 7.6 litres. The electrical system runs on 24 V. The engine fitted is the S4D95LE-3. The Komatsu Midi Excavator series covers 21 models. Rated output within it ranges from 28.2 to 62.6 kW; the PC78MR-6 sits in the lower part of that range with 40.3 kW. Its immediate neighbours are the PC60-7 below it with 40 kW and the PC80-1 above it with 44.7 kW. 1159 Komatsu models across 39 series are on record. The model is listed under Excavators & compaction. 16 verified figures from 1 source are on file.

Technical data

Engine

Engine modelS4D95LE-3correct
Power40.3 kWcorrect
Rated speed1,850 rpmcorrect
Cylinders4correct
Displacement3,261 cm³correct
AspirationTurbocharged with aftercoolercorrect
Coolant capacity10.6 lcorrect
Engine oil capacity7.6 lcorrect

Dimensions and weights

Ground clearance362.7correct
Unladen weight8,270 kgcorrect

Drivetrain and chassis

System voltage24 Vcorrect

Working data

Pump flow160.1 l/mincorrect
Hydraulic oil capacity110.2 lcorrect
Hydraulic pressure264.8 barcorrect
Fuel tank capacity125.3 lcorrect

Other data

Height2,731correct

Where this model stands

Power-to-weight ratio: 4.9 kW/t (40 kW / 8.3 t)

Stronger than 8% of the excavators & compaction in the register — out of 1,666 models with a stated power figure.

Calculated from the documented figures above — not a rating.

Frequently asked questions

How much power does the Komatsu PC78MR-6 have?

The Komatsu PC78MR-6 delivers 40.3 kW.

How much does the Komatsu PC78MR-6 weigh?

The unladen weight is 8,270 kg.

What engine does the Komatsu PC78MR-6 have?

4 cylinders, 3,261 cm³ displacement.

What to check before buying

  • Check the hour meter against the service records — a replaced instrument is the most common gap.
  • Compare the data plate and chassis number with the papers.
  • Check the weights in the papers against the figures here — attachments change them.
  • Load the hydraulics and watch for sag.
  • Ask about parts availability for this build year — the running costs hang on it.

A general list for this type of machine — no substitute for an inspection or an appraiser.

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This page carries 16 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.

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Other models in this series

PC130-8

PC160LC-8

PC40 MRx

PC40MR-2

PC45MR-3

PC45R-8

PC50MR-2

PC55MR-3

PC58UU-3

PC60-1

PC60-7

PC60L-1

Sources: [1]

Excavator in 3D section

Turn the model, look inside and click an assembly — each one is explained.

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