651 Partial Wheel Tractor-Scraper

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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.

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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.
Tractor Engine Cat® C18
Bore 5.7in
Displacement 1105in³
Gross Power (SAE J1995) 637HP
Net Power (SAE J1349/ISO 9249) 592HP
Stroke 7.2in
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
Top Speed - Loaded 34.9mile/h
Brakes ISO 3450:2011
Cab Seat Belt: SAE J386:AUG2012
ROPS/FOPS ROPS: ISO 3471:2008 for up to 26 600 kg (58,643 lb). FOPS: ISO 3449:2005 Level II
Steering Angle - Left 85
Steering Angle - Right 90
Width - 180° Turn - Left 47.57ft
Width - 180° Turn - Right 44.6ft
Cooling System 23.4gal (US)
Crankcase 10gal (US)
Differential 36gal (US)
Final Drive - Each 6gal (US)
Fuel Tank 430.1gal (US)
Hydraulic Reservoir 39.6gal (US)
Transmission 35.9gal (US)
Windshield Washer 0.5gal (US)

Standard Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Powertrain
    • Transmission: 8-speed planetary powershift, ECPC control, APECS software, programmable top gear selection, transmission hold, differential lock, guard - power train, ground speed control, machine speed limit
    • Cat C18
    • Cat engine brake
    • Electric start, 24V
    • Fan, hydraulic
    • Ground level engine shutdown
    • Radiator
    • Guard, crankcase
    • Starting aid, ether
    • Braking system: primary and secondary, wet disc, hydraulic; parking, hydraulic-released, spring-applied
    • Throttle lock
  • Electrical
    • Alarm, backup
    • Alternator, 115 ampere
    • Batteries (4), 12V, 1,000 CCA, maintenance free
    • Electrical system, 24V
    • Lighting system: headlights (halogen), turn signals with hazard functions (LED)
    • Turn signals with hazard function
    • Starting/charging receptacle
  • Operator Environment
    • HVAC system, heat, AC, defrost
    • Thermostat control of HVAC system
    • Coat hook
    • Lunchbox platform with holding strap
    • Diagnostic connection (2)
    • 12V power ports (2)
    • Differential lock (1)
    • Dome courtesy light
    • Horn, electric
    • T-handle implement control
    • Radio ready
    • ROPS/FOPS cab, pressurized
    • Keypad switches: rear engine start; throttle lock; wipers/washers; hazard lights; worklights on, off; information mode; messenger display; safety tab rocker switches, parking brake
    • Seat belt, static two-piece
    • Windows, sliding
    • Windows, laminated, zipped in
    • Wrist Rest/Grab Handle
    • Windshield wipers, front and rear windows, includes washers
    • Door lock
    • Messenger display gauges, warnings include: coolant temp; engine oil temp; hydraulic oil temp; DPF temp; fuel level; park brake; implement lockout; brake system, regeneration required; throttle lock; system voltage; secondary steering; bail down; differential lock; apron float; transmission hold; high beam lights; action lamp; engine speed, rpm; gear selection; DPF fill levels
    • Safety tab rocker switches
    • Seat: Cat Advanced Ride Management (ARM), Cat Comfort Series III, rotates 30 degrees
    • Steering wheel, tilt, telescoping, padded
    • Windows, right side emergency egress
    • Messenger display
  • Fluids
    • Extended life coolant to -37° C (-34° F)
  • Other Equipment
    • Accumulators (brake and cushion hitch) with Canadian Registration Number (CRN)
    • Fast oil change
    • Vandalism locks
    • Steering locks
    • Heater, engine coolant 120V

Optional Equipment:

  • Powertrain
    • Air cleaner, powered precleaner
  • Operator Environment
    • Powered access ladder
  • Other Attachments
    • Camera arrangement: Work Area Vision System (WAVS)
    • Cab beacon
    • Air horn
    • Air horn and beacon
    • Kingbolt housing
    • Rear wheel arrangement (set of 2)
    • Scraper draft arm package
    • Steering cylinder group (set of 2)
    • Wiring group
Renee HerndonRenee Herndon
21:55 29 Feb 24
Dalton was very helpful, The road construction, however, was not! 😂I would rather have to sand paper an alligators @$$ in a phone booth that to get in that mess again.
Michael BirrenMichael Birren
14:58 24 Feb 24
I purchased a used C-15 from a customer of Greg Pool was a running take out. I picked up the engine from the Greg Pool Cat near Nags Head NC. They started they had done all service on this engine stated the hours and all items replaced during the life of engine under their care. I just recently put the engine in my boat after 2 years of building the vessel I find that everything they said about the engine was a LIE!!! Turbo was Bad, After cooler was not updated to the newer version for the C-15 it was missing a terminal Resistor that was clearly stolen off the engine which created a major issue with start up upon installation. Greg Pool Caterpillar stated the hours at 3300 we find out there were 5700 hours. I didn’t do a start up or test run which I regret because i was dealing with a Caterpillar dealer i thought i could trust them. Clearly not Buyers Be Ware if your dealing with Greg Pool Caterpillar in NC. I have 3 of the C-15 engines in my Work boats here in Tampa Fl and my Cat dealership here is Ring power who have done an amazing job to get me going with this Engine. I am very Disappointed in The Caterpillar company for allowing such A dealership to exist.
David LawrenceDavid Lawrence
13:04 22 Feb 24
Brandon PierceBrandon Pierce
22:00 18 Feb 24
Darin NoeDarin Noe
01:17 16 Feb 24
Jose SotoJose Soto
15:26 23 Sep 23
Hunter ElliottHunter Elliott
16:17 07 Sep 23
Rick Kelly-CrapseRick Kelly-Crapse
21:06 25 Aug 23
They had all my parts for my 3208 Cat.Friendly folks at parts counter.
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