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Komatsu WD420-3

Series: Komatsu Wheel Dozer

Source: https://www.komatsu.com/en-za

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The Komatsu WD420-3 is a model in the Komatsu Wheel Dozer series. The engine delivers 227.1 hp (167 kW), has 6 cylinders, with a displacement of 7,151.3 cm³. The unladen weight is 20,000 kg. The wheelbase measures 3,301 mm. The tank holds 340.3 litres. The gearbox has 4 forward gears. There are also 4 reverse gears. The engine fitted is the SA6D108. Tyre size: 23,5-25-12PR. The Komatsu Wheel Dozer series covers 6 models. Rated output within it ranges from 157.1 to 537.4 hp; the WD420-3 sits in the lower part of that range with 227.1 hp. Its immediate neighbours are the D61PX-15 below it with 157.1 hp and the WD600-1 above it with 459.6 hp. 1159 Komatsu models across 39 series are on record. The model is listed under Mining equipment. 12 verified figures from 1 source are on file.

Technical data

Engine

Engine modelSA6D108correct
Power227.1 hp (167 kW)correct
Cylinders6correct
Displacement7,151.3 cm³correct

Dimensions and weights

Wheelbase3,301correct
Unladen weight20,000 kgcorrect

Drivetrain and chassis

Forward gears4correct
Reverse gears4correct
Tyre size23.5-25-12PRcorrect

Working data

Fuel tank capacity340.3 lcorrect

Other data

Height3,371.1correct

Where this model stands

Power-to-weight ratio: 8.3 kW/t (167 kW / 20 t)

Stronger than 60% of the mining equipment in the register — out of 945 models with a stated power figure.

Calculated from the documented figures above — not a rating.

Frequently asked questions

How much power does the Komatsu WD420-3 have?

The Komatsu WD420-3 delivers 227 hp.

How much does the Komatsu WD420-3 weigh?

The unladen weight is 20,000 kg.

What engine does the Komatsu WD420-3 have?

6 cylinders, 7,151 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 12 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

D61PX-15

WD600-1

WD600-3

WD600-6

WD900-3

Sources: [1]

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