Komatsu D575A - Wikipedia, the free encyclopedia

Komatsu D575A - Wikipedia, the free encyclopedia:



Komatsu D575A



From Wikipedia, the free encyclopedia
Komatsu D575A
Komatsu575a.jpg


A Komatsu D575 pictured with a man leaning against the blade arm
TypeBulldozer/ripper (D575A-3)

Bulldozer (D575A-3 SD)
ManufacturerKomatsu Ltd.
Production1991-present
Length38 feet 5 inches (11.71 m)
Width24 feet 3 inches (7.39 m) (width of standard blade)
Height16 feet 0 inches (4.88 m)
WeightD575A-3 - 131,350 kilograms (289,580 lb)

D575-A3 SD - 152,600 kilograms (336,400 lb)
PropulsionTracks
The Komatsu D575A is a 1,150 horsepower (860 kW) tractor crawler available as a bulldozer/ripper, the D575A-3, or as a dedicated bulldozer, the D575A-3 SD Super Dozer.[1] Equipped with a standard blade, both versions are capable of moving 90 cubic yards (69 m3) of material per pass although the D575A-3 SD Super Dozer is capable of moving 125 cubic yards (96 m3) of material per pass if equipped with an optional blade.[2][3] The D575A-3 can dig to a maximum depth of 6 feet 9 inches (2.06 m) using its single shank ripper.[4]

Currently the largest bulldozer in production, the D575A has been produced by Komatsu Ltd. in Osaka, Japan since 1991.[4][5] Surface mine operators in the United States, Canada and Australia are the primary users of the D575A, although it is sometimes used in heavy construction applications.





Development

Komatsu first showed a 1,000 horsepower (750 kW) bulldozer prototype, the D555A, to the public at the Conexpo equipment exhibition in Houston, Texas
in 1981. Due to economic conditions at the time, development was
stalled for much of the 1980s. A successor to the D555A prototype, the
D575A-2 SR Super Ripper, began field testing in North America in 1989,
and full production began in 1991.[4][6]
The D575A-2 SR Super Ripper was joined by the D575A-2 SD Super Dozer in
1995 when the first D575A-2 SD Super Dozer was purchased and placed
into service by the Princess Beverly Coal Co. in Cabin Creek, West Virginia.[3] The current model, the D575A-3 SD Super Dozer was introduced in 2001.[3][4]

Specifications

A 12-cylinder, four-stroke, water-cooled, direct injected, turbocharged, aftercooled, 1,150 horsepower (860 kW) Komatsu SA12V170E diesel engine powers the 152.6 t (168 short tons) D575A.

The D575A features a standard blade that measures 11 feet 11 inches
(3.63 m) high and 24 feet 3 inches (7.39 m) wide, enabling the D575A to
move 90 cubic yards (69 m3) of material per pass. The D575A measures 16 feet 0 inches (4.88 m) tall, 38 feet 5 inches (11.71 m) long has a ground clearance of 2 feet 5 inches (0.74 m).[2]

The D575A has a ground contact area of 101.55 square feet (9.434 m2) and exerts an average ground pressure of 23 pounds per square inch (160 kPa).[2]

Applications

The D575A is primarily used in surface mines in West Virginia, mostly operating on Alpha Natural Resources
sites in Appalachia. To date, 17 D575A's are in service in the West
Virginia Coal Fields. There is one super ripper that operates in Las Vegas, and another 2 operating on New Zealands South Island in the Stockton mine.

Models

D555A (Prototype)

The D555A prototype was first shown to the public in 1981 at the Conexpo
equipment exhibition in Houston, TX. Due to economic conditions at the
time, development was stalled for much of the 1980s. A successor to the
D555A, the D575A-2 SR Super Ripper began field testing in 1989 and was
the first model to enter production beginning in 1991.[6]

D575A-2 SR Super Ripper dozer/ripper (Discontinued)

The D575A-2 SR Super Ripper was the first production version of the
D575A, going into production beginning in 1991. The D575A-2 SR Super
Ripper included a single shank ripper capable of digging to a maximum
depth of 6 feet 9 inches (2.06 m).[4] The D575A-2 SR Super Ripper was superseded by the D575A-3.

D575A-2 SD Super Dozer dedicated dozer (Discontinued)

The D575A-2 SD Super Dozer was the second version of the D575A, going
into production alongside the D575A-2 SR Super Ripper beginning in
1995.[3]
The D575A-2 SD Super Dozer is an 1,150 horsepower (860 kW), 143,300
kilograms (315,900 lb) dedicated dozer with no ripper. The D575A-2 SD
Super Dozer was superseded by the D575A-3 SD Super Dozer.

D575A-3 dozer/ripper

The D575A-3 is an 1,150 horsepower (860 kW) dozer/ripper weighing
131,350 kilograms (289,580 lb) and capable of moving up to 90 cubic
yards (69 m3) of material per pass. The single shank ripper has a maximum digging depth of 6 feet 9 inches (2.06 m).

D575A-3 SD Super Dozer dedicated dozer

Introduced in 2001 as the successor to the D575A-2 SD Super Dozer,
the D575A-3 SD Super Dozer is a dedicated dozer with no ripper weighing
152,600 kilograms (336,400 lb). Equipped with a standard blade, the
D575A-3 SD is capable of moving up to 90 cubic yards (69 m3)
of material per pass, however, when equipped with an optional blade, the
D575A-3 SD is capable of moving up to 125 cubic yards (96 m3)
per pass. The D575A-3 SD includes major changes to the frame,
powertrain, undercarriage, and blade, making it substantially different
from the D575A-3.[3]

In comparison to its predecessor, the D575A-3 SD includes a
significantly re-designed operator cabin and powertrain electronic
control system to increase productivity and a number of durability
improvements including reinforced undercarriage roller guards, simpler
hydraulic plumbing and longer-life hoses, seals, wiring harnesses, and
connectors.[7]

Transportation

Due to its immense size, the D575A must be broken down into component
form when it is moved from one job site to another. Moving all the
components requires six to eight truck loads [5]

See also

Notes

  1. Komatsu: Crawler Dozers 2005.
  2. Komatsu America Corp - Equipment - D575A-3SD 2010.
  3. Moore 1996.
  4. Orlemann 2002.
  5. Arabe 2001.
  6. Haddock 2002.
  7. Komatsu upgrades its Super Dozer 2001-12.

References

External links

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