651 Wheel Tractor-Scraper

651 Wheel Tractor-Scraper

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

Tractor Engine
Cat C18
Flywheel Power - Tractor/Scraper
469kW (629 hp)
Scraper Capacity - Heaped
44 yd³
Top Speed - Loaded
34.9 mile/h

Engine

Tractor Engine
Cat C18

Tractor Engine

Flywheel Power - Tractor/Scraper
469kW (629 hp)
Net Power
469 kW/637 hp
Gross Power (SAE J1995)
637HP
Net Power (ISO 14396)
585HP
Net Power (SAE J1349/ISO 9249)
592HP
Bore
5.7in
Stroke
7.2in
Displacement
1105in³

Scraper Bowl

Scraper Capacity - Heaped
44yd³
Rated Load
104058lb
Capacity - Struck
32yd³
Depth of Cut - Maximum
17.3in
Width - Cut - To Router Bits
12.5ft
Ground Clearance - Maximum
2.3ft
Hyd. Penetration Force - 657G
121000lb
Depth of Spread - Maximum
26in
Apron Opening
92in
Apron Closure Force
39200lb

Transmission

Top Speed - Loaded
34.9mile/h
1 Forward
3.5mile/h
2 Forward
6.5mile/h
3 Forward
7.8mile/h
4 Forward
10.6mile/h
5 Forward
14.2mile/h
6 Forward
19.2mile/h
7 Forward
25.7mile/h
8 Forward
34.9mile/h
Reverse
6.7mile/h

Weights - Push-Pull

Total Shipping
160505lb
Tractor Shipping
93635lb
Scraper Shipping
64068lb
Total Operating - Empty
164244lb
Front Axle
93842lb
Rear Axle
66663lb
Total Operating - Loaded
268302lb
Front Axle - Loaded
134165lb
Rear Axle - Loaded
130340lb

Dimensions

Width - Overall Machine
14.3ft
Width - Tractor
12.3ft
Width - Rear Tire Center Lines
9.21ft
Width - Inside of Bowl
12.07ft
Width - Outside Bowl - Shipping Width
12.98ft
Height - Overall Shipping
15.29ft
Height - Top of Cab
12.86ft
Ground Clearance - Tractor
2.3ft
Front of Tractor to Front Axle
14.93ft
Axle to Vertical Hitch Pin
1.8ft
Height - Scraper Blade Maximum
2.17ft
Wheel Base
32.68ft
Length - Overall Machine
58.96ft
Rear Axle - Rear of Machine
8.07ft

Steering

Width - 180° Turn - Right
44.6ft
Width - 180° Turn - Left
47.57ft
Steering Angle - Right
90
Steering Angle - Left
85

Service Refill Capacities - Tractor

Crankcase
13.7gal (US)
Transmission
35.9gal (US)
Differential
36gal (US)
Final Drive - Each
6gal (US)
Cooling System
23.4gal (US)
Hydraulic Reservoir
39.6gal (US)
Windshield Washer
0.5gal (US)

Hydraulics

Bowl Cylinder Bore
7.08in
Bowl Cylinder Stroke
37.4in
Apron Cylinder Bore
7.08in
Apron Cylinder Stroke
29.92in
Steering Circuit (@ High Idle)
76.08gal/min
Cushion Hitch Circuit
19.54gal/min
Secondary Steering Circuit
14.52gal/hr
Relief Valve - Steering Circuit
1959psi
Relief Valve - Implement Circuit
1999psi
Compensator Settings - Cushion Hitch Circuit
3002psi

Service Refill Capacities - Scraper

Fuel Tank
430gal (US)
Differential
44gal (US)
Final Drive - Each
7.8gal (US)
Transmission
31.9gal (US)
Crankcase
8.9gal (US)
Cooling System
16.6gal (US)

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

Optional Equipment:

Specifications

Engine

Tractor Engine
Cat C18

Tractor Engine

Flywheel Power - Tractor/Scraper
469kW (629 hp)
Net Power
469 kW/637 hp
Gross Power (SAE J1995)
637HP
Net Power (ISO 14396)
585HP
Net Power (SAE J1349/ISO 9249)
592HP
Bore
5.7in
Stroke
7.2in
Displacement
1105in³

Scraper Bowl

Scraper Capacity - Heaped
44yd³
Rated Load
104058lb
Capacity - Struck
32yd³
Depth of Cut - Maximum
17.3in
Width - Cut - To Router Bits
12.5ft
Ground Clearance - Maximum
2.3ft
Hyd. Penetration Force - 657G
121000lb
Depth of Spread - Maximum
26in
Apron Opening
92in
Apron Closure Force
39200lb

Transmission

Top Speed - Loaded
34.9mile/h
1 Forward
3.5mile/h
2 Forward
6.5mile/h
3 Forward
7.8mile/h
4 Forward
10.6mile/h
5 Forward
14.2mile/h
6 Forward
19.2mile/h
7 Forward
25.7mile/h
8 Forward
34.9mile/h
Reverse
6.7mile/h

Weights - Push-Pull

Total Shipping
160505lb
Tractor Shipping
93635lb
Scraper Shipping
64068lb
Total Operating - Empty
164244lb
Front Axle
93842lb
Rear Axle
66663lb
Total Operating - Loaded
268302lb
Front Axle - Loaded
134165lb
Rear Axle - Loaded
130340lb

Dimensions

Width - Overall Machine
14.3ft
Width - Tractor
12.3ft
Width - Rear Tire Center Lines
9.21ft
Width - Inside of Bowl
12.07ft
Width - Outside Bowl - Shipping Width
12.98ft
Height - Overall Shipping
15.29ft
Height - Top of Cab
12.86ft
Ground Clearance - Tractor
2.3ft
Front of Tractor to Front Axle
14.93ft
Axle to Vertical Hitch Pin
1.8ft
Height - Scraper Blade Maximum
2.17ft
Wheel Base
32.68ft
Length - Overall Machine
58.96ft
Rear Axle - Rear of Machine
8.07ft

Steering

Width - 180° Turn - Right
44.6ft
Width - 180° Turn - Left
47.57ft
Steering Angle - Right
90
Steering Angle - Left
85

Service Refill Capacities - Tractor

Crankcase
13.7gal (US)
Transmission
35.9gal (US)
Differential
36gal (US)
Final Drive - Each
6gal (US)
Cooling System
23.4gal (US)
Hydraulic Reservoir
39.6gal (US)
Windshield Washer
0.5gal (US)

Hydraulics

Bowl Cylinder Bore
7.08in
Bowl Cylinder Stroke
37.4in
Apron Cylinder Bore
7.08in
Apron Cylinder Stroke
29.92in
Steering Circuit (@ High Idle)
76.08gal/min
Cushion Hitch Circuit
19.54gal/min
Secondary Steering Circuit
14.52gal/hr
Relief Valve - Steering Circuit
1959psi
Relief Valve - Implement Circuit
1999psi
Compensator Settings - Cushion Hitch Circuit
3002psi

Service Refill Capacities - Scraper

Fuel Tank
430gal (US)
Differential
44gal (US)
Final Drive - Each
7.8gal (US)
Transmission
31.9gal (US)
Crankcase
8.9gal (US)
Cooling System
16.6gal (US)

Standard/Optional Features

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

Optional Equipment: