Overview
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
Specifications
Units:
| Tractor Engine | Cat C18 |
| Flywheel Power - Tractor/Scraper | 469kW (629 hp) |
| Scraper Capacity - Heaped | — |
Benefits & Features
October 21, 2025
Specifications
Units:
| Tractor Engine | Cat C18 |
| Flywheel Power - Tractor/Scraper | 469kW (629 hp) |
| Net Power | 469 kW/637 hp |
| Gross Power (SAE J1995) | — |
| Net Power (ISO 14396) | — |
| Net Power (SAE J1349/ISO 9249) | — |
| Bore | — |
| Stroke | — |
| Displacement | — |
| Scraper Capacity - Heaped | — |
| Rated Load | — |
| Capacity - Struck | — |
| Depth of Cut - Maximum | — |
| Width - Cut - To Router Bits | — |
| Ground Clearance - Maximum | — |
| Hyd. Penetration Force - 657G | — |
| Depth of Spread - Maximum | — |
| Apron Opening | — |
| Apron Closure Force | — |
| Top Speed - Loaded | — |
| 1 Forward | — |
| 2 Forward | — |
| 3 Forward | — |
| 4 Forward | — |
| 5 Forward | — |
| 6 Forward | — |
| 7 Forward | — |
| 8 Forward | — |
| Reverse | — |
| Bowl Cylinder Bore | — |
| Bowl Cylinder Stroke | — |
| Apron Cylinder Bore | — |
| Apron Cylinder Stroke | — |
| Steering Circuit (@ High Idle) | — |
| Cushion Hitch Circuit | — |
| Secondary Steering Circuit | — |
| Relief Valve - Steering Circuit | — |
| Relief Valve - Implement Circuit | — |
| Compensator Settings - Cushion Hitch Circuit | — |
| Width - 180° Turn - Right | — |
| Width - 180° Turn - Left | — |
| Steering Angle - Right | 90 |
| Steering Angle - Left | 85 |
| Crankcase | — |
| Transmission | — |
| Differential | — |
| Final Drive - Each | — |
| Cooling System | — |
| Hydraulic Reservoir | — |
| Windshield Washer | — |
| Width - Overall Machine | — |
| Width - Tractor | — |
| Width - Rear Tire Center Lines | — |
| Width - Inside of Bowl | — |
| Width - Outside Bowl - Shipping Width | — |
| Height - Overall Shipping | — |
| Height - Top of Cab | — |
| Ground Clearance - Tractor | — |
| Front of Tractor to Front Axle | — |
| Axle to Vertical Hitch Pin | — |
| Height - Scraper Blade Maximum | — |
| Wheel Base | — |
| Length - Overall Machine | — |
| Rear Axle - Rear of Machine | — |
| Total Shipping | — |
| Tractor Shipping | — |
| Scraper Shipping | — |
| Total Operating - Empty | — |
| Front Axle | — |
| Rear Axle | — |
| Total Operating - Loaded | — |
| Front Axle - Loaded | — |
| Rear Axle - Loaded | — |
| Fuel Tank | — |
| Differential | — |
| Final Drive - Each | — |
| Transmission | — |
| Crankcase | — |
| Cooling System | — |
Benefits & Features
BE MORE PRODUCTIVE
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
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
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
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
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).
Data not available.
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