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Komatsu America Corp. - D155AX-8 Crawler Dozers

The new Tier 4 Final D155AX-8 dozer incorporates proven Komatsu engine emissions technology that does not interfere with daily operation. Class leading engine horsepower, large capacity Sigmadozer blade and automatic lockup torque converter efficiently move massive amounts of material while using less fuel than the prior model. The operator's cab is loaded with features to help maintain operator comfort during the work day.

Features & Benefits


The Komatsu SAA6D140E-7 engine is EPA Tier 4 Final emissions certified and provides exceptional performance while reducing fuel consumption.

Heavy-duty aftertreatment system

This new system combines a Komatsu Diesel Particulate Filter (KDPF) and Selective Catalytic Reduction (SCR).

New Fuel Efficient Bulldozer

New D155AX-8 has achieved both high levels of productivity and fuel economy through usage of SIGMADOZER and automatic transmission with lockup torque converter.

Auto-pitch mode

To reduce operator effort and increase operating efficiency the new auto blade pitch mode sets blade pitch position between digging and dump positions while dozing.

Ripper auto-return

The ripper control lever is new, ergonomic and incorporates an auto-return function that will automatically raise the ripper so the operator is less fatigued at the end of the day. The function starts when travel lever is moved to reverse position.

Komatsu Auto Idle Shutdown

Komatsu auto idle shutdown automatically shuts the engine down after idling for a set period of time to reduce unnecessary fuel consumption and exhaust emissions.


Key specifications
Horsepower 354 @1900 rpm
Operating Weight 89,300 lbs
Blade Capacity 12.3 - 15.6 yd³

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