Engineering:Caterpillar 797B
| Caterpillar 797B | |
|---|---|
| Overview | |
| Manufacturer | Caterpillar Inc. |
| Production | Spring 2002 - December 2009 |
| Assembly | North America |
| Body and chassis | |
| Class | Ultra |
| Body style | 2-door Dump |
| Layout | Front-engine, rear-wheel-drive layout |
| Powertrain | |
| Engine | Caterpillar 117 L (7,143 cu in) 3524B V-12 x 2 (t/c diesel) |
| Transmission | 7-speed planetary gearset mechanical |
| Dimensions | |
| Wheelbase | 7.19 m (23 ft 7 in) |
| Length | 14.45 m (47 ft 5 in) |
| Width | 9.75 m (32 ft 0 in) - overall tyre width (fully loaded) |
| Height | 6.55 m (21 ft 6 in) - to top of ROPS (empty) |
| us|uk|Kerb|Curb}} weight | 623.69 t (1,375,000 lb) |
| Chronology | |
| Predecessor | 797 |
| Successor | 797F |
- for an overview of the Caterpillar 797 series, see: Caterpillar 797
The Caterpillar 797B is an off-highway, ultra class, two-axle, mechanical powertrain haul truck developed and manufactured by Caterpillar Inc. in the United States specifically for high production mining and heavy-duty construction applications world-wide.[1] The 797B is the second generation of the 797 series. The 797B was introduced to the public in spring of 2002 and first entered service with a customer in October, 2002.[2] The 797B remained in production until December, 2009 when Caterpillar started full production of the 797B's successor, the 797F.[3] While it was in production, the 797B was Caterpillar's largest, highest payload capacity haul truck model.
Improvements
Compared to the first generation 797, the 797B has a larger payload capacity and a more powerful 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.[4]
The 797B's increased payload capacity of 345 t (380 short tons) is a 18.1 t (20 short tons) increase over the first generation 797. Caterpillar increased the power output of the Cat 3524B EUI 24-cylinder diesel engine used in the 797 from net 2,394 kW (3,211 hp) to net 2,513 kW (3,370 hp) enabling the 797B to achieve a 68 km/h (42 mph) top speed when transporting a 345 t (380 short tons) load, a 3.2 km/h (2 mph) increase over the first generation 797.[5]
Powertrain
Unlike its primary competitors which use diesel-electric powertrains, the Caterpillar 797B employs a mechanical drive powertrain.[4] Caterpillar is the only manufacturer of ultra class haul trucks that feature mechanical powertrains; all ultra class haul trucks offered by competitors employ diesel-electric powertrains.
797B engine
A gross 2,647 kW (3,550 hp) [net 2,513 kW (3,370 hp)], twin turbocharged version of the Cat 3524B engine powers the 797B.[6] The power rating of the 3524B engine is valid up to an elevation of 2,591 m (8,500 ft) or 4,572 m (15,000 ft) with a high altitude arrangement.[7]
Transmission
The 797B is equipped with a rear axle mounted, computer controlled, seven speed planetary transmission with an integral lock-up torque converter.[8]
Wheels and tires
The Caterpillar 797B uses six 5,300 kg (11,680 lb) Michelin 59/80R63 XDR radial tyres.[9]
797 Series specifications
| Specification | 797 | 797B | 797F |
|---|---|---|---|
| Introduction to Service | 1999 | 2002 | 2008 |
| Nominal Payload Capacity | 327 t (360 short tons) | 345 t (380 short tons) | 363 t (400 short tons) |
| Gross Machine Operating Weight | 557.9 t (1,230,000 lb) | 623.7 t (1,375,000 lb) | 623.7 t (1,375,000 lb) |
| Engine Model | 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 | 2,394 kW (3,211 hp) net | 2,513 kW (3,370 hp) net (SAE J1349) | 2,828 kW (3,793 hp) net (SAE J1349) |
| Top Speed (Loaded) | 64 km/h (40 mph) | 68 km/h (42 mph) | 68 km/h (42 mph) |
| Overall Height to Top of ROPS (Empty) | 7.21 m (23 ft 8 in) | 7.59 m (24 ft 11 in) | 7.44 m (24 ft 5 in) |
| Overall Height (Body Raised) | 15.01 m (49 ft 3 in) | 15.29 m (50 ft 2 in) | 15.70 m (51 ft 6 in) |
| Overall Length | 14.50 m (47 ft 7 in) | 14.45 m (47 ft 5 in) | 15.09 m (49 ft 6 in) |
| Overall Tire Width (loaded) | 9.14 m (30 ft 0 in) | 9.75 m (32 ft 0 in) | 9.53 m (31 ft 3 in) |
| Fuel Capacity | 4,542 L (1,200 US gal) | 4,542 L (1,200 US gal) | 3,785 L (1,000 US gal) |
See also
- Haul truck
Notes
- ↑ Caterpillar Inc. 2009.
- ↑ Orlemann 2003, p. 319.
- ↑ Caterpillar Inc. 2009a.
- ↑ 4.0 4.1 Mercer 1999, p. 1.
- ↑ Caterpillar Inc. 2003, p. 19.
- ↑ Caterpillar Inc. 2003, p. 1.
- ↑ Caterpillar Inc. 2003, p. 4.
- ↑ Caterpillar Inc. 2003, p. 5.
- ↑ Manufacture Française des Pneumatiques Michelin 2007, p. 15.
References
- "Caterpillar 797B Mining Truck Product Brochure AEHQ5511". cat.com. Caterpillar Inc. December 2003. Archived from the original on 2009-10-28. https://www.webcitation.org/5kqmQ4sYK?url=http://www.cat.com/cmms/images/C198751.pdf. Retrieved 2009-10-28. "... Net Power - Cat 3,370 hp....Nominal Payload Capacity 380 tons ..."
- "Release Number: 231PR09 - Caterpillar Moves Forward with New Large Mining Trucks" (Press release). Caterpillar Inc. July 2009. Archived from the original (Microsoft Word 97-2003 Document) on 2009-10-21. Retrieved 2009-10-21.
... go into full production...late this year.
- "Off-Highway Trucks from Caterpillar". cat.com. Caterpillar Inc. Archived from the original on 2009-10-21. https://www.webcitation.org/5khMDWHyR?url=http://www.cat.com/cda/layout?m=169215&x=7. Retrieved 2009-10-21. "Developed specifically for high production mining and heavy-duty construction applications ..."
- Orlemann, Eric C. (2003). Steve Gansen. ed. The Caterpillar Century. United States of America: Motorbook International. ISBN 0-7603-1882-4. https://books.google.com/books?id=073x8SEhQIwC. Retrieved 2009-10-27.
- Mercer, Mike (June 1999). "A look at Cat's new 797 haul truck - Caterpillar Inc". Diesel Progress North American Edition. CBS Interactive Inc. http://findarticles.com/p/articles/mi_m0FZX/is_6_65/ai_55084212/. Retrieved 2009-10-27. "Caterpillar designed the truck in response to mining companies seeking a means to reduce cost per ton ..."
- "Michelin Factbook - 2007 Edition" (Shockwave Flash Presentation). michelin.com. Manufacture Française des Pneumatiques Michelin. 2007. Archived from the original on 2009-10-27. https://www.webcitation.org/5kqaUeJSE?url=http://www.michelin.com/corporate/ImageServlet?imageCode=8910611033&codeSite=MICHCORP&UIFONTSIZE=10&UISMALLFONTSIZE=10. Retrieved 2009-10-27. "59/80 R 63 Michelin XDR Diameter: 4,028 meters...Weight: 5,300 kg ..."
External links
- Caterpillar 797B Mining Truck Product Brochure AEHQ5511 (PDF)
- Product Safety > Off-Highway Tractors and Trucks - Caterpillar Inc.
- Viewpoint - Perspectives on Modern Mining - Caterpillar Inc.
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