Komatsu D575A

The Komatsu D575A is a 1,150 horsepower (860 kW) tractor crawler produced in a 'SR' or Super Ripper bulldozer/ripper configuration, or as a dedicated bulldozer in the form of the 'SD' or Super Dozer.[1] Both models can move 90 cubic yards (69 m3) of material per pass using the standard blade. The D575A-3 SD Super Dozer can move 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]

Komatsu D575A
A Komatsu D575 pictured with a man leaning against the push arm.
TypeBulldozer/ripper (D575A-3)
Bulldozer (D575A-3 SD)
ManufacturerKomatsu Ltd.
Production1989-2012
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

Commonly referred to as the 'world's largest production bulldozer', the D575A series bulldozers were produced by Komatsu Ltd. in Osaka, Japan.[4][5] Surface mine operators in the United States, Australia and Japan were the primary users of the D575A, although they were sometimes used in heavy construction applications and quarries as well.

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 by the Cooney Brothers Coal Company in PA where over 1000 hours were logged. Prototype machines are also believed to have been tested at the Harrison Coal and Reclamation Park. Full production began in 1991.[4][6] The first production machine, delivered in 1992, was initially trialed in PA where the prototypes tested. The first machine was built up by Anderson Equipment Company and then sold to American Asphalt and Paving Company where it initially worked in Las Vegas. The D575A-2 SR Super Ripper was joined by the D575A-2 SD Super Dozer in 1995. 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 updated models, the D575A-3 and D575A-3SD Super Dozer were introduced in 2001.[3][4]

Series

The first series of D575A bulldozers were the D575A-2 machines. These were produced in both SR 'Super Ripper and SD 'Super Dozer' configurations. These models were produced between the years of 1991 and 2000 and 41 machines were built. In 2001 the D575A-3 machines were introduced. These were produced in both SR 'Super Ripper and SD 'Super Dozer' configurations. They wore a new trade dress however most of the upgrades were electronic. Upgrades included features such as the 'Palm Command Control System', smooth and soft operation modes, ECMV controlled transmission, ECMV controlled transmission steering clutches/brakes, preset travel speed selection function and auto-shift down function. Upgrades made within the cab also included a new suspension seat and upgraded displays and monitoring systems. These models were produced between the years of 2001 and 2007 and 11 machines were built. In 2012, a custom order was placed by Alcoa in Australia and a final machine was built taking the total A3 build number to 12.

Production

All Komatsu bulldozers are identified by the letter D (for Dozer) followed by the model number (575A). Following that, the series is represented (-2 or -3) and finally the configuration (SR or SD). Each machine had its model number and serial number stamped onto a personal identification plate that was located inside the cab. Serial Numbers 10001 – 10043 were A2 machines. Serial numbers ceased at 10043 and started back up at 10101 when the A3 series machine production begun. Serial Numbers 10101 – 10112 were A3 machines. Serial numbers 10004 and 10013 were not produced due to the bad luck associated with both numbers (#4 and #13) in Japanese culture.


Production numbers were as follows:

D575A-2SR = 17 machines

D575A-2SD = 24 machines

D575A-3SR = 2 machines

D575A-3SD = 10 machines


Total -2 Machines = 41 machines

Total -3 Machines = 12 machines


Total SR machines = 19 machines

Total SD machines = 34 machines


Overall total = 53 machines

Specifications

A 12-cylinder, four-stroke, water-cooled, direct injected, turbocharged, intercooled, 1,150 horsepower (860 kW) Komatsu SA12V170E diesel engine powers the D575A-3.

The D575A-3SD 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-3SD features a Super Dozer blade designed to dump, dig or carry that measures 11 feet 11 inches (3.63 m) high and 24 feet 3 inches (7.39 m) wide. It has a capacity of 90yd3 (69m3).

The D575A-3 could be optioned with a Semi-U blade or a U-dozer blade. Either could be ordered with single or dual tilt cylinders. The Semi-U has a capacity of 44.5y3 (34m3) while the U-dozer blade has a capacity of 58.8yd3 (45m3).

The D575A-3SD 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]

The D575A-3 Super Ripper weighs 289,570 lb (131,350kg). The D575A-3SD weighs 336,420 lb (152,600kg).

Applications

From new, North American companies purchased 31 machines, 14 machines were sold to Australia and 8 machines were sold within Japan. Within the United States, the D575A bulldozers were primarily used in surface mines in West Virginia, mostly operating for Alpha Natural Resources and Horizon / Princess Beverly Coal on mines in Appalachia. At one stage, 17 D575A's were in service in the West Virginia Coal Fields. In Australia, machines were used in surface mines and on some major road projects across the country. The majority of the machines sold within Australia were Super Ripper. Alcoa, located in Western Australia purchased 5 machines and used them to rip large areas where they couldn't blast due to the proximity to residential housing and they were often operated by Remote Control. 8 machines were sold within Japan working in quarries with many being owned by Fujisaco Co. LTD. Two second hand D575A-2SD machines (ex Australia) were sold to Kaipara Limited (New Zealand) and with the help of Komatsu Australia, had rippers retrofitted to the machines. The machines were operated out of Stockton coal mine in the West Coast region of New Zealand's South Island. These machines were used to rip above areas where abandoned mine shafts existed and were also often operated via Remote Control.

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. It produced 1,050hp (784kw). 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 SR dozer/ripper (Discontinued)

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 (Discontinued)

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 depending on local laws.[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.

References
  • Arabe, Katrina C. (2001-02-01). "No Bull About It: The World's Largest Dozer". ThomasNet News Industry Market Trends. Thomas Publishing Company. Archived from the original on 2010-10-14. Retrieved 2010-10-24. ...the Komatsu D575A is unquestionably the world's largest and most powerful bulldozer.
  • Haddock, Keith (2002). "Chapter 2 Crawler Tractors and Bulldozers". In Glaser, Amy (ed.). The Earthmover Encyclopedia: The Complete Guide to Heavy Equipment of the World. St. Paul, Minnesota, USA: Motorbooks. p. 43. ISBN 978-0-7603-2964-1. Retrieved 2010-10-24. In 1981 Komatsu presented the D555A at the Conexpo equipment exhibition in Houston, Texas.
  • "Komatsu America Corp - Equipment - D575A-3SD". komatsuamerica.com. Komatsu America Corp. 2010. Archived from the original on 2010-12-03. Retrieved 2010-10-24. Net power SAE J1349 1,150 HP
  • "Komatsu: Crawler Dozers - Construction and Mining Equipment". komatsu.com. Komatsu Ltd. 2005. Archived from the original on 2010-12-02. Retrieved 2010-10-24. With specified blade, giant ripper, ROPS and cab
  • "Komatsu upgrades its Super Dozer". Off Highway Engineering Online. SAE International. December 2001. Archived from the original on 2002-06-17. Retrieved 2010-10-24. ...the operator still has a lot to do with productivity, the company focused first on the operator environment
  • Moore, Walt (1996-04-01). "Checking up on the world's largest dozer". Construction Equipment. Construction Equipment. Archived from the original on 2012-11-05. Retrieved 2010-10-24. ...The first to go to work was purchased in early 1995 by the Princess Beverly Coal Co. in Cabin Creek (near Charleston), W. Va.
  • Orlemann, Eric C. (2002-06-13). "Chapter 1 The Living Legend". In Palmer, Kris (ed.). Colossal Caterpillar The Ultimate Earthmover. St. Paul, Minnesota, USA: MBI Publishing Company. pp. 34–35. ISBN 978-0-7603-0874-5. Retrieved 2010-10-24. These giant dozers first started field testing in North America in 1989...
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