The Komatsu D475A is the second largest bulldozer

Bulldozer

A bulldozer is a crawler equipped with a substantial metal plate used to push large quantities of soil, sand, rubble, etc., during construction work and typically equipped at the rear with a claw-like device to loosen densely-compacted materials.Bulldozers can be found on a wide range of sites,...

 in the Komatsu line after the D575A, the world's largest production bulldozer. The current version is the 238960 lbs, 899 hp D475A-5 Tier 2. There are several versions of the D475A that are used in surface mining

Surface mining

Surface mining , is a type of mining in which soil and rock overlying the mineral deposit are removed...

, open-pit mining

Open-pit mining

Open-pit mining or opencast mining refers to a method of extracting rock or minerals from the earth by their removal from an open pit or borrow....

, quarries

Quarry

A quarry is a type of open-pit mine from which rock or minerals are extracted. Quarries are generally used for extracting building materials, such as dimension stone, construction aggregate, riprap, sand, and gravel. They are often collocated with concrete and asphalt plants due to the requirement...

 and construction

Construction

In the fields of architecture and civil engineering, construction is a process that consists of the building or assembling of infrastructure. Far from being a single activity, large scale construction is a feat of human multitasking...

worldwide.

The 740 hp D475A-1 was introduced in 1986 as a replacement for the 650 hp D455A.

External links

• Komatsu America Corp. D475A-5 Tier 2 product page (archived from the original on 2010-10-26)
• Komatsu D475A-5 With Tier 2 Engine Product Brochure AESS724-00 04/06 (EV-1) (archived from the original on 2010-10-26)