Caterpillar 797F
Encyclopedia
- for an overview of the Caterpillar 797 series, see: Caterpillar 797
The Caterpillar 797F is an off-highway
Highway
A highway is any public road. In American English, the term is common and almost always designates major roads. In British English, the term designates any road open to the public. Any interconnected set of highways can be variously referred to as a "highway system", a "highway network", or a...
, ultra class, two-axle
Axle
An axle is a central shaft for a rotating wheel or gear. On wheeled vehicles, the axle may be fixed to the wheels, rotating with them, or fixed to its surroundings, with the wheels rotating around the axle. In the former case, bearings or bushings are provided at the mounting points where the axle...
, mechanical powertrain
Powertrain
In a motor vehicle, the term powertrain or powerplant refers to the group of components that generate power and deliver it to the road surface, water, or air. This includes the engine, transmission, drive shafts, differentials, and the final drive...
haul truck developed and manufactured by Caterpillar Inc.
Caterpillar Inc.
Caterpillar Inc. , also known as "CAT", designs, manufactures, markets and sells machinery and engines and sells financial products and insurance to customers via a worldwide dealer network. Caterpillar is the world's largest manufacturer of construction and mining equipment, diesel and natural gas...
in the United States specifically for high production mining
Mining
Mining is the extraction of valuable minerals or other geological materials from the earth, from an ore body, vein or seam. The term also includes the removal of soil. Materials recovered by mining include base metals, precious metals, iron, uranium, coal, diamonds, limestone, oil shale, rock...
and heavy-duty 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...
applications worldwide
World
World is a common name for the whole of human civilization, specifically human experience, history, or the human condition in general, worldwide, i.e. anywhere on Earth....
. The 797F is the third, current generation model of the 797 series and is Caterpillar's largest, highest payload capacity haul truck.
Public Debut
Caterpillar introduced the 797F to the public at MINExpo InternationalMinExpo International
MinExpo International is a trade show sponsored by the National Mining Association. The show exhibits the latest mining and minerals processing technologies, and state-of-the-art machinery and equipment for the coal, metal and nonmetal mining processing industries...
in September, 2008. The 797F replaced its predecessor model, the 797B, when the 797F entered full production in late 2009. Prior to the introduction of the Caterpillar 797F and the Bucyrus MT6300AC
Bucyrus MT6300AC
The Bucyrus MT6300AC is an off-highway, ultra class, two-axle, diesel/AC electric powertrain haul truck designed and manufactured by Bucyrus International Inc. in the United States...
at MINExpo International in September, 2008, the Liebherr T 282B
Liebherr T 282B
The Liebherr T 282B is an off-highway, ultra class, rigid frame, two-axle, diesel/electric, AC powertrain haul truck designed and manufactured by the Liebherr Mining Equipment Co. in Newport News, Virginia, USA...
, introduced in 2004, was the only haul truck with a payload capacity of 400 ST (362.9 t).
Improvements
Compared to the 797B, the 797F has a larger payload capacity and a more powerful, more efficient engine. These changes allowed Caterpillar to meet mine operators' needs to increase operational efficiency and reduce costs by increasing the amount of material hauled per trip.The 797F's increased payload capacity of 400 ST (362.9 t) is a 20 ST (18.1 t) increase over the 797B.
Caterpillar replaced the gross 3550 HP [net 3370 HP] Cat 3524B EUI 24-cylinder
Cylinder (engine)
A cylinder is the central working part of a reciprocating engine or pump, the space in which a piston travels. Multiple cylinders are commonly arranged side by side in a bank, or engine block, which is typically cast from aluminum or cast iron before receiving precision machine work...
diesel engine
Diesel engine
A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber...
used in the 797B with the gross 4000 HP [net 3793 HP] Cat C175-20 ACERT 20-cylinder diesel engine, enabling the 797F to maintain the 42 mph (67.6 km/h) top speed of the 797B while transporting a heavier 400 ST (362.9 t) payload.
Engine
A gross 4000 HP [net 3793 HP] Cat C175-20 ACERT single block, 20-cylinder, electronic common railCommon rail
Common rail direct fuel injection is a modern variant of direct fuel injection system for petrol and diesel engines.On diesel engines, it features a high-pressure fuel rail feeding individual solenoid valves, as opposed to low-pressure fuel pump feeding unit injectors...
injection, quad turbocharged
Turbocharger
A turbocharger, or turbo , from the Greek "τύρβη" is a centrifugal compressor powered by a turbine that is driven by an engine's exhaust gases. Its benefit lies with the compressor increasing the mass of air entering the engine , thereby resulting in greater performance...
, air-to-air aftercooled
Intercooler
An intercooler , or charge air cooler, is an air-to-air or air-to-liquid heat exchange device used on turbocharged and supercharged internal combustion engines to improve their volumetric efficiency by increasing intake air charge density through nearly isobaric cooling, which removes...
, four-stroke diesel engine powers the 797F. The power rating of the C175-20 is valid up to an elevation of 7000 ft (2,133.6 m) or up to 16000 ft (4,876.8 m) with a high altitude arrangement.
Transmission
The 797F is equipped with a rear axleAxle
An axle is a central shaft for a rotating wheel or gear. On wheeled vehicles, the axle may be fixed to the wheels, rotating with them, or fixed to its surroundings, with the wheels rotating around the axle. In the former case, bearings or bushings are provided at the mounting points where the axle...
mounted, computer
Computer
A computer is a programmable machine designed to sequentially and automatically carry out a sequence of arithmetic or logical operations. The particular sequence of operations can be changed readily, allowing the computer to solve more than one kind of problem...
controlled, seven speed planetary transmission
Transmission (mechanics)
A machine consists of a power source and a power transmission system, which provides controlled application of the power. Merriam-Webster defines transmission as: an assembly of parts including the speed-changing gears and the propeller shaft by which the power is transmitted from an engine to a...
with an integral lock-up torque converter
Torque converter
In modern usage, a torque converter is generally a type of hydrodynamic fluid coupling that is used to transfer rotating power from a prime mover, such as an internal combustion engine or electric motor, to a rotating driven load...
.Caterpillar is the only manufacturer of ultra class haul trucks to employ a hydraulic torque converter
Torque converter
In modern usage, a torque converter is generally a type of hydrodynamic fluid coupling that is used to transfer rotating power from a prime mover, such as an internal combustion engine or electric motor, to a rotating driven load...
transmission. All ultra class haul trucks offered by competitors employ diesel-electric transmissions.
Tires
The Caterpillar 797F uses six 59/80R63 5300 kg (11,684.5 lb) MichelinMichelin
Michelin is a tyre manufacturer based in Clermont-Ferrand in the Auvergne région of France. It is one of the two largest tyre manufacturers in the world along with Bridgestone. In addition to the Michelin brand, it also owns the BFGoodrich, Kleber, Riken, Kormoran and Uniroyal tyre brands...
XDR or Bridgestone
Bridgestone
The is a multinational rubber conglomerate founded in 1931 by in the city of Kurume, Fukuoka, Japan. The name Bridgestone comes from a calque translation and transposition of ishibashi, meaning "stone bridge" in Japanese....
V-Steel Rock Deep radial tire
Radial tire
A radial tire is a particular design of automotive tire . In this design, the cord plies are arranged at 90 degrees to the direction of travel, or radially ....
s.
Assembly
See Caterpillar 797 - Manufacturing and AssemblyCaterpillar 797 Series Specifications
| Specification | 797 | 797B | 797F |
|---|---|---|---|
| Public Introduction | 1999 | 2002 | 2008 |
| Nominal Payload Capacity | 360 ST (326.6 t) | 380 ST (344.7 t) | 400 ST (362.9 t) |
| Gross Machine Operating Weight | 1230000 lb (557,918.6 kg) | 1375000 lb (623,689.5 kg) | 1375000 lb (623,689.5 kg) |
| Engine Make & Model | Cat 3524B High Displacement EUI | Cat 3524B High Displacement EUI | Cat C175-20 ACERT |
| Engine Arrangement | V-12 x 2 | V-12 x 2 | V-20 |
| Engine Power | 3211 HP net | 3370 HP net (SAE J1349) | 3793 HP net (SAE J1349) |
| Top Speed (Loaded) | 40 mph (64.4 km/h) | 42 mph (67.6 km/h) | 42 mph (67.6 km/h) |
| Overall Height to Top of ROPS (Empty) | 23 in 8 in (7.21 m) | 24 in 11 in (7.59 m) | 21 in 5 in (6.53 m) |
| Overall Height (Body Raised) | 49 in 3 in (15.01 m) | 50 in 2 in (15.29 m) | 51 in 6 in (15.7 m) |
| Overall Length | 47 in 7 in (14.5 m) | 47 in 5 in (14.45 m) | 49 in 6 in (15.09 m) |
| Overall Tire Width (loaded) | 30 in 0 in (9.14 m) | 32 in 0 in (9.75 m) | 31 in 3 in (9.53 m) |
| Fuel Capacity | 1000 US gal (3,785.4 l) | 1800 US gal (6,813.7 l) | 1000 US gal (3,785.4 l) |
See also
- Bucyrus MT6300ACBucyrus MT6300ACThe Bucyrus MT6300AC is an off-highway, ultra class, two-axle, diesel/AC electric powertrain haul truck designed and manufactured by Bucyrus International Inc. in the United States...
- Caterpillar 797
- Caterpillar 797BCaterpillar 797BThe Caterpillar 797 is a series of off-highway, ultra class, two-axle, mechanical powertrain haul trucks developed and manufactured in the United States by Caterpillar Inc. specifically for high production mining and heavy-duty construction applications world-wide. In production since 1998, the 797...
- Komatsu 960E-1Komatsu 960E-1The Komatsu 960E-1 is an off-highway, ultra-class, rigid-frame, two-axle, diesel/AC electric powertrain haul truck designed and manufactured by Komatsu America Corp. in Peoria, Illinois, United States. The 960E-1 is Komatsu's largest, highest capacity haul truck, offering a payload capacity of up to...
- Liebherr T 282BLiebherr T 282BThe Liebherr T 282B is an off-highway, ultra class, rigid frame, two-axle, diesel/electric, AC powertrain haul truck designed and manufactured by the Liebherr Mining Equipment Co. in Newport News, Virginia, USA...
- Terex 33-19 "Titan"Terex 33-19 "Titan"The Terex 33-19 "Titan" was a prototype off-highway, ultra class, rigid frame, three-axle, diesel/AC electric powertrain haul truck designed by the Terex Division of General Motors and assembled at General Motors Diesel Division's London, ON, Canada assembly plant in 1973. Only one 33-19 was ever...
- Haul truck
External links
- Caterpillar 797F Mining Truck Product Brochure AEHQ6039 (PDF)
- Caterpillar 797F Website - Caterpillar Inc.
- Product Safety > Off-Highway Tractors and Trucks - Caterpillar Inc.
- Viewpoint - Perspectives on Modern Mining - Caterpillar Inc.