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Komatsu D21A-3 Crawler

Series: Other models

The photo shows the D85A-12 from the same series. Source: https://www.truck1.eu/construction-machinery/crawler-excavat

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The Komatsu Crawler Tractor series from Komatsu includes the D21A-3. The engine delivers 37.5 hp (27.6 kW), has 4 cylinders, with a displacement of 2,605.5 cm³. Rated speed is 2,450 rpm. The unladen weight is 3,430 kg. Ground clearance is 310.9 mm. The tank holds 60.2 litres. The gearbox has 3 forward gears. There are also 3 reverse gears. The cooling system holds 14 litres. The engine fitted is the 4D92-1. The Komatsu Crawler Tractor series covers 265 models. Rated output within it ranges from 35.5 to 4,126.5 hp; the D21A-3 sits at the bottom of that range with 37.5 hp. Its immediate neighbours are the D20P-3 below it with 35.5 hp and the D20A-5 above it with 39.5 hp. 1159 Komatsu models across 39 series are on record. The model is listed under Mining equipment. 14 verified figures from 1 source are on file.

Technical data

Engine

Engine model4D92-1correct
Power37.5 hp (27.6 kW)correct
Rated speed2,450 rpmcorrect
Cylinders4correct
Displacement2,605.5 cm³correct
Coolant capacity14 lcorrect

Dimensions and weights

Ground clearance310.9correct
Unladen weight3,430 kgcorrect

Drivetrain and chassis

Gearbox typeHScorrect
Forward gears3correct
Reverse gears3correct

Working data

Fuel tank capacity60.2 lcorrect

Other data

Height2,087.9correct

Where this model stands

Power-to-weight ratio: 8 kW/t (28 kW / 3.4 t)

Stronger than 0% 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 D21A-3 have?

The Komatsu D21A-3 delivers 37.5 hp.

How much does the Komatsu D21A-3 weigh?

The unladen weight is 3,430 kg.

What engine does the Komatsu D21A-3 have?

4 cylinders, 2,606 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 14 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

02ESV36

02ESV56

02ESV60

12CM12

12CM15

12CM27

12HM series

14CM09CC

14CM10

14CM15

14CM15B

14CM15C

Sources: [1]

Dump truck in 3D section

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