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Ergonomic controls and a newly redesigned cab interior provide a more comfortable and efficient working environment all day long
Safety features help increase operator confidence by providing a safer environment for operations - effective wet disc brakes, WAVS camera, and powered access cab entry
The 651 emits up to 15% less CO2 than the previous 651E.
Key Specs
Caterpillar offers partial wheel tractor-scraper power units designed for specialty machines that complement the traditional Cat® product line. These tractor-only configurations are available for purchase directly from Caterpillar OEM Solutions. They can be leveraged for a variety of final machines, including water pulls, elevating scrapers, lowboy trailer power units, and more. With improvements in productivity combined with enhancements in operator comfort and new safety features – Powered Access System and effective wet disc brakes – this machine offers high returns on time and investment.
Ergonomic controls and a newly redesigned cab interior provide a more comfortable and efficient working environment all day long
Safety features help increase operator confidence by providing a safer environment for operations - effective wet disc brakes, WAVS camera, and powered access cab entry
The 651 emits up to 15% less CO2 than the previous 651E.
| Tractor Engine | Cat® C18 Cat® C18 |
| Note | Meets U.S. EPA Tier 4 Final or EU Stage V emission standards, or equivalent to U.S. EPA Tier 2, or equivalent to U.S. EPA Tier 3 and EU Stage IIIA. Meets U.S. EPA Tier 4 Final or EU Stage V emission standards, or equivalent to U.S. EPA Tier 2, or equivalent to U.S. EPA Tier 3 and EU Stage IIIA. |
| Gross Power (SAE J1995) | 637 HP 475 kW |
| Net Power (SAE J1349/ISO 9249) | 592 HP 436 kW |
| Bore | 5.7 in 145 mm |
| Stroke | 7.2 in 183 mm |
| Displacement | 1105 in³ 18.1 l |
| Top Speed - Loaded | 34.9 mile/h 56.1 km/h |
| 1 Forward | 3.5 mile/h 5.7 km/h |
| 2 Forward | 6.5 mile/h 10.5 km/h |
| 3 Forward | 7.8 mile/h 12.5 km/h |
| 4 Forward | 10.6 mile/h 17 km/h |
| 5 Forward | 14.2 mile/h 22.8 km/h |
| 6 Forward | 19.2 mile/h 30.9 km/h |
| 7 Forward | 25.7 mile/h 41.4 km/h |
| 8 Forward | 34.9 mile/h 56.1 km/h |
| Reverse | 6.7 mile/h 10.8 km/h |
| Width - 180° Turn - Right | 44.6 ft 13.6 m |
| Width - 180° Turn - Left | 47.57 ft 14.5 m |
| Steering Angle - Right | 90 90 |
| Steering Angle - Left | 85 85 |
| Brakes | ISO 3450:2011 ISO 3450:2011 |
| ROPS/FOPS | ROPS: ISO 3471:2008 for up to 26 600 kg (58,643 lb). FOPS: ISO 3449:2005 Level II ROPS: ISO 3471:2008 for up to 26 600 kg (58,643 lb). FOPS: ISO 3449:2005 Level II |
| Cab | Seat Belt: SAE J386:AUG2012 Seat Belt: SAE J386:AUG2012 |
| Fuel Tank | 430.1 gal (US) 1628 l |
| Crankcase | 10 gal (US) 38 l |
| Transmission | 35.9 gal (US) 136 l |
| Differential | 36 gal (US) 136 l |
| Final Drive - Each | 6 gal (US) 29.5 l |
| Cooling System | 23.4 gal (US) 88.6 l |
| Hydraulic Reservoir | 39.6 gal (US) 150 l |
| Windshield Washer | 0.5 gal (US) 5 l |
