Engine
| Tractor Engine | Cat C18 Cat C18 |
My Account
Sign In
Welcome! Sign In to personalize your Cat.com experience
If you already have an existing account with another Cat App, you can use the same account to sign in here
Register Now
One Account. All of Cat.
Your Caterpillar account is the single account you use to log in to select services and applications we offer. Shop for parts and machines online, manage your fleet, go mobile, and more.
Welcome Back!
My Account Dashboard
Account Information
Site Settings
Security
Enhanced Operator Comfort
Ergonomic controls and a newly redesigned cab interior provide a more comfortable and efficient working environment all day long
Up To 6% Higher Productivity
Improvements in fuel efficiency, utilizing payload estimator, and the new transmission controls deliver increased productivity
Unparalleled Safety
Safety features help increase operator confidence by providing a safer environment for operations - effective wet disc brakes, WAVS camera, and powered access cab entry
Up To 15% Less CO2 Emissions
The 651 emits up to 15% less CO2 than the previous 651E.
Open Bowl Scrapers 651
Request A Price Find DealerKey Specs
- Tractor Engine
- Cat C18
- Cat C18
- Flywheel Power - Tractor/Scraper
- 469kW (629 hp)
- 469kW (629 hp)
- Scraper Capacity - Heaped
- 44 yd³
- 33.6 m³
Overview
High productivity / low cost solution
Caterpillar is excited to announce the 651 comeback into our Wheel Tractor-Scraper lineup in 2022. Delivering high levels of productivity, the 651 single engine earthmoving system is a wise choice on numerous large-scale projects by providing fast cycle times when working in lower grades and rolling resistance applications. First introduced into the Cat® Wheel Tractor-Scraper lineup in 1962, the 651 continues to uphold its legacy as one of our signaturemachines. Its single engine power gives the ability to work with a Cat D10 or D11 push dozer delivering ultra-fast load times and the ability to work in abrasive or rocky conditions. Improvements in productivity, combined with enhancements in operator comfort, and new safety features – Powered Access System and effective wet disc brakes – for a machine offering high returns on profit and time
Benefits
Enhanced Operator Comfort
Ergonomic controls and a newly redesigned cab interior provide a more comfortable and efficient working environment all day long
Up To 6% Higher Productivity
Improvements in fuel efficiency, utilizing payload estimator, and the new transmission controls deliver increased productivity
Unparalleled Safety
Safety features help increase operator confidence by providing a safer environment for operations - effective wet disc brakes, WAVS camera, and powered access cab entry
Up To 15% Less CO2 Emissions
The 651 emits up to 15% less CO2 than the previous 651E.
Features At A Glance
BE MORE PRODUCTIVE
- Move more material with Advanced Productivity Electronic ControlSystem (APECS), which allows the machine to better utilize engine power and torque.
- Set the desired top speed with Ground Speed Control, and the machine will find the gear that works best for the engine and the transmission, providing a lower fuel burn in speed reduced areas.
- The Machine Speed Limit feature replaces Top Gear Selection.
- Auto-Stall assists in quickly bringing the transmission to an operating temperature at start-up when working in colder climates.
- Cat Payload Estimator for scrapers achieves on-the-go weighing to deliver optimal payload and jobsite efficiency.
WORK IN COMFORT
- Steer with less effort with the newly designed high-pressure steering system.
- Reduce up to 14 individual operator commands per cycle with
Sequence Assist (optional attachment). - Enjoy interior improvements and a more ergonomic work
environment. - Intuitive, ergonomic controls with multifunction display keep
operators focused on their work. - Maintain desired cab temperature with automatic temperature
control.
DESIGNED FOR SAFETY
- Get in and out of the cab easier with the new powered access
ladder system. - Enhance the operator’s awareness of site surroundings with the
optional Work Area Vision System (WAVS). - Ground-level access to fuel fill and several maintenance points for
easier and safer service. - Seat belt indicator provides visual and audible alerts when the seat
belt is not in use.Wide brake shoes and brake drums improve brake performance and reduce brake and drum wear - Separate front and rear circuits. Secondary brakes engage automatically if service pressure drops
- Parking Brake features a spring-applied, hydraulic pressure released mechanism that operates the service brakes
EASY TO OPERATE
- Cat Advanced Ride Management (ARM) seat suspension reduces end stroke movement of the load cylinder for a smoother ride.
- Engine overspeed protection will automatically engage with no operator input when the machine is in eighth gear. The machine will assist in slowing the machine speed by canceling the throttle command and engaging the engine compression brake.
INTEGRATED CAT TECHNOLOGIES
- Access information anytime, anywhere with Vision Link®– use it to make informed decisions that boost productivity, lower costs, simplify maintenance, and improve safety and security on your jobsite.
- Product Link™
collects machine data that can be viewed online
through web and mobile applications (optional attachment).
Product Specifications for 651
Tractor Engine
| Flywheel Power - Tractor/Scraper | 469kW (629 hp) 469kW (629 hp) |
| Net Power | 469 kW/637 hp 469 kW/637 hp |
| Gross Power (SAE J1995) | 637 hp 475 kW |
| Net Power (ISO 14396) | 585 hp 436 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 |
Scraper Bowl
| Scraper Capacity - Heaped | 44 yd³ 33.6 m³ |
| Rated Load | 104058 lb 47200 kg |
| Capacity - Struck | 32 yd³ 24.5 m³ |
| Depth of Cut - Maximum | 17.3 in 417 mm |
| Width - Cut - To Router Bits | 12.5 ft 3.8 m |
| Ground Clearance - Maximum | 2.3 ft 0.7 m |
| Hyd. Penetration Force - 657G | 121000 lb 542 kN |
| Depth of Spread - Maximum | 26 in 530 mm |
| Apron Opening | 92 in 2337 mm |
| Apron Closure Force | 39200 lb 176 kN |
Transmission
| 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 |
Hydraulics
| Bowl Cylinder Bore | 7.08 in 180 mm |
| Bowl Cylinder Stroke | 37.4 in 950 mm |
| Apron Cylinder Bore | 7.08 in 180 mm |
| Apron Cylinder Stroke | 29.92 in 759.5 mm |
| Steering Circuit (@ High Idle) | 76.08 gal/min 288 l/min |
| Cushion Hitch Circuit | 19.54 gal/min 74 l/min |
| Secondary Steering Circuit | 14.52 gal/hr 55 l/hr |
| Relief Valve - Steering Circuit | 1959 psi 13500 kPa |
| Relief Valve - Implement Circuit | 1999 psi 13780 kPa |
| Compensator Settings - Cushion Hitch Circuit | 3002 psi 20700 kPa |
Steering
| 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 |
Service Refill Capacities - Tractor
| Crankcase | 13.7 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 |
Dimensions
| Width - Overall Machine | 14.3 ft 4.36 m |
| Width - Tractor | 12.3 ft 3.75 m |
| Width - Rear Tire Center Lines | 9.21 ft 2.81 m |
| Width - Inside of Bowl | 12.07 ft 3.68 m |
| Width - Outside Bowl - Shipping Width | 12.98 ft 3.93 m |
| Height - Overall Shipping | 15.29 ft 4.66 m |
| Height - Top of Cab | 12.86 ft 3.92 m |
| Ground Clearance - Tractor | 2.3 ft 0.7 m |
| Front of Tractor to Front Axle | 14.93 ft 4.55 m |
| Axle to Vertical Hitch Pin | 1.8 ft 0.55 m |
| Height - Scraper Blade Maximum | 2.17 ft 0.66 m |
| Wheel Base | 32.68 ft 9.96 m |
| Length - Overall Machine | 58.96 ft 17.97 m |
| Rear Axle - Rear of Machine | 8.07 ft 2.46 m |
Weights - Push-Pull
| Total Shipping | 160505 lb 72804 kg |
| Tractor Shipping | 93635 lb 42472 kg |
| Scraper Shipping | 64068 lb 29061 kg |
| Total Operating - Empty | 164244 lb 74500 kg |
| Front Axle | 93842 lb 42566 kg |
| Rear Axle | 66663 lb 30238 kg |
| Total Operating - Loaded | 268302 lb 121700 kg |
| Front Axle - Loaded | 134165 lb 60856 kg |
| Rear Axle - Loaded | 130340 lb 59121 kg |
Service Refill Capacities - Scraper
| Fuel Tank | 430 gal (US) 1628 l |
| Differential | 44 gal (US) 168 l |
| Final Drive - Each | 7.8 gal (US) 30 l |
| Transmission | 31.9 gal (US) 121 l |
| Crankcase | 8.9 gal (US) 34 l |
| Cooling System | 16.6 gal (US) 63.2 l |
651 Standard Equipment
NOTE
- Standard and optional equipment may vary. Consult your Cat dealer for details.
ELECTRICAL
- Alarm, backup
- Alternator, 115 amp - tractor engine
- Alternator, 65 amp - scraper engine
- Batteries Tractor (4), 12V Maintenance Free, High Output
- Batteries Scraper (4), 12V Maintenance Free, High Output
- Electrical System, 24V
- Lighting System - Tractor
- Lighting System - Scraper
- Starting Receptacle - tractor and scraper engines
OPERATOR ENVIRONMENT
- Air Conditioner (includes heater and defroster)
- Automotive style fuse panel with fuse puller
- Lunch box platform with holding strap
- Coat Hook
- Cup holder
- Diagnostic Connection Port (12V)
- Dome Courtesy Light
- Engine speed lock
- Fan defroster
- Gauge Group
- Horn
- Implement Control Joystick
- Rearview Mirrors
- Radio Ready
- 2 radio openings, speakers, and 5-amp converter
- ROPS Cab with Sound Suppression and Pressurization
- Static Seatbelt, 2 piece
- Scraper Engine Controls
- Seat, Air Suspension, Cat Advanced Ride Management
- Steering Wheel - tilt and telescoping
- Storage Compartment
- Transmission Hold
- Windows - sliding side
- Windshield - laminated glass
- Windshield Wiper/Washer - front and rear
- Wrist Rest/Grab Handle
POWER TRAIN
- Tractor
- Scraper
OTHER STANDARD EQUIPMENT
- Tractor
- Scraper
Compatible Technology and Services
Leverage Caterpillar connected data and security principles to improve efficiencies, increase productivity and make your business more profitable.
Equipment Management
Productivity
-
Cat Inspect
Cat® Inspect allows you to access your equipment data on your mobile device. This easy-to-use app lets you capture inspection data and integrates with your other Cat data systems, so you can keep a close eye on your fleet. More than one million inspections are completed each year, providing convenience and accountability to equipment owners.
-
VisionLink®
VisionLink® is a cloud-based software application that takes the guesswork out of fleet management with key insights to maximize performance - regardless of fleet size or equipment manufacturer. Receive equipment data seamlessly to your desktop or mobile device, all from a convenient centralized solution to make informed decisions at every turn.
1
-
8
of
9 Items
items
Cat® Inspect allows you to access your equipment data on your mobile device. This easy-to-use app lets you capture inspection data and integrates with your other Cat data systems, so you can keep a close eye on your fleet. More than one million inspections are completed each year, providing convenience and accountability to equipment owners.
VisionLink® is a cloud-based software application that takes the guesswork out of fleet management with key insights to maximize performance - regardless of fleet size or equipment manufacturer. Receive equipment data seamlessly to your desktop or mobile device, all from a convenient centralized solution to make informed decisions at every turn.
-
VisionLink® Productivity
VisionLink® Productivity is an easy-to-use cloud-based platform that gathers and summarizes machine telematics and jobsite data from all your equipment. Actionable performance data is transmitted to the web platform for users to access anywhere, anytime via a mobile, tablet, or desktop device - on or off the jobsite.
1
-
8
of
9 Items
items
VisionLink® Productivity is an easy-to-use cloud-based platform that gathers and summarizes machine telematics and jobsite data from all your equipment. Actionable performance data is transmitted to the web platform for users to access anywhere, anytime via a mobile, tablet, or desktop device - on or off the jobsite.
See how 651 compares against frequently compared products.
Wheel Tractor-Scrapers
651
Selected
- Tractor Engine
- Cat C18
- Cat C18
- Flywheel Power - Tractor/Scraper
- 469kW (629 hp)
- 469kW (629 hp)
- Scraper Capacity - Heaped
- 44 yd³
- 33.6 m³
Wheel Tractor-Scrapers
637
- Flywheel Power - Tractor/Scraper
- 570 hp
- 425 kW
- Scraper Capacity - Heaped
- 34 yd³
- 26 m³
- Top Speed - Loaded
- 34.7 mile/h
- 55.8 km/h
Wheel Tractor-Scrapers
657
- Tractor Engine
- Cat C18
- Cat C18
- Flywheel Power - Tractor/Scraper
- 469kW (629 hp) / 353 kW (473 hp)
- 469kW (629 hp) / 353 kW (473 hp)
- Scraper Engine
- Cat C15
- Cat C15
Use the comparison tool to compare detailed specs of Cat and competitor models.
Compare All ModelsBoost Productivity. Improve Efficiency.
Cat® Technology for construction helps contractors meet production goals and improve efficiencies.
Learn MoreSustainability in Action
We’re committed to helping you achieve your environmental and business goals.
Learn Moreassignment Product Brochures and More Are Ready to Download!
Caterpillar product brochures and other informational documents are available for your growing business.
Take the interactive virtual product tour to explore the great features and benefits of the 651
Start 651 Tour
close
Related Products
Technology Kits
