Komatsu D21A-6 Specifications & Technical Data (1988-1992)

Technical specs - D21A-6 Komatsu

Specification

Notice: Every data listed is verified by LECTURA Specs team experts. However, incomplete data and mistakes might occur. Contact our team with any change suggestion.

Weight: 4.2 t

Blade type: S/TS

Track width: 300 mm

Model series: D

Engine manuf.: Komatsu

Engine type: 4D94-2P

Engine power: 29 kW

More technical details, like: transport length, transport width, transport height, soil pressure, travel speed, reverse travel speed, front blade width, transmission type, max. drawbar pull, dimension lxwxh, displacement, revolutions at max torque...

More technical details, like: transport length, transport width, transport height, soil pressure, travel speed, reverse travel speed, front blade width, transmission type, max. drawbar pull, dimension lxwxh, displacement, revolutions at max torque, max. torque, no. of cylinders, cylinder bore x stroke, emission level are available in the full technical specs.

Basic model with ROPS cabin and corresponding blade

Buy full specs

Special equipment

Diesel particulate filter: No
Rear ripper: No
Tilt device: No
Aircondition: No

Komatsu D21A-6 FAQ

When was the Komatsu D21A-6 manufactured?

The Komatsu D21A-6 was manufactured from 1988 to 1992.

How much does the Komatsu D21A-6 bulldozer weigh?

The Komatsu D21A-6 bulldozer weighs 4.2 tons.

What is the track width of the Komatsu D21A-6 bulldozer's undercarriage?

The Komatsu D21A-6 bulldozer has a track width of 300 mm.

What type of blade does the Komatsu D21A-6 bulldozer use?

The Komatsu D21A-6 bulldozer uses an angling blade and a hydraulically pivotable angling blade.

How much is a Komatsu D21A-6 Bulldozer (1988u20131992) worth?

The residual value of the Komatsu D21A-6 depends on the machine's individual parameters. Visit the LECTURA Valuation to check it.

Events

Visit Komatsu live at

SteinExpo 2026

Homberg/Nieder-Ofleiden, Germany

September 2 — 5

NordBau 2026

Holstenhallen Neumünster, Germany

September 9 — 13

Machine inspection

Ask for inspection of your Komatsu D21A-6 from experts

Mevas is an international operating inspection service for used heavy machinery. Construction machinery inspectors are available in more than 20 countries.

Use this service to minimise the risk when buying used equipment. An inspection by Mevas costs less than repairing a defective hydraulic cylinder.

Enquire machine inspection

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Spare parts & Components

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Do your lookup for high quality parts for Komatsu D21A-6 online!
With a few, easy steps, you will find generic and genuine parts and replacements in well-catalogued lists. Wether you are dealer or an owner, LECTURA can lead you to the right direction.
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Transport

Bulldozers Transport & Shipping Services

In case you want to transport your machine, apply our services. Examine the ideal transport quotes for Bulldozers created on transport dimensions and weight. Our partners offer comprehensive options to meet your requirements.

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News

Construction News by LECTURA 06.08.2026

Hitachi Construction Machinery brings its startup challenge to Europe

Hitachi Construction Machinery (Head Office: Taito-ku, Tokyo, Japan; President and Executive Officer: Masafumi Senzaki; “Hitachi Construction Machinery”) is inviting startups to help shape the construction and mining sites of the future as part of the LANDCROS Innovation Studios Challenge Europe 2026.

D21A-6 Komatsu D21A-6 Specifications & Technical Data (1988—1992)