631 Wheel Tractor-Scraper
Quick loading, high travel speeds and the ability to load and dump on the run yield fast cycle times, allowing Cat Wheel Tractor-Scrapers to consistently deliver high productivity at the lowest cost per ton.
Product Images
631K Open Bowl Scraper
631 Open Bowl Scraper
631 Open Bowl Scraper
Product Videos
631K Delivering more for Q.H. & M. Birt
631K Delivering more for Q.H. & M. Birt
Wheel Tractor-Scraper K Series
Wheel Tractor-Scraper K Series Operator Testimonial
Wheel Tractor Scraper CAT® 631K C202
Virtual Product Tour (VPT)
360° Exterior View (HTML)
360 Exterior View
360 Interior View
360 Interior View
Specifications
| Name | Type | Value | Unit Value (Imperial) | Unit Name | Unit Value (Metric) | Unit Name (Metric) |
|---|---|---|---|---|---|---|
| Emissions | text | Cat® C18 engine meets U.S. EPA Tier 4 Final/EU Stage IV emission standards. | ||||
| Engine Model - Tractor | text | Cat® C18 | ||||
| Rated Engine RPM - Tractor | measurement | 1900 | r/min | 1900 | r/min |
Documents & Spec Sheets
Features & Benefits
Be More Productive
- The Advanced Productivity Electronic Control System (APECS) allows
the engine and transmission to communicate on a high level. This
communication allows the machine to utilize better the power
and torque the engine is producing. The net result is moving more
material. - Use Ground Speed Control to set the desired top speed and the machine will find the gear that works best for the engine and the
transmission, providing a lower fuel burn. - The machine speed limit feature allows the machine to maintain a
set top speed instead of relying on top gear selector. - Auto-Stall assists in quickly bringing the transmission to an
operating temperature at start-up when the machine is working in a cold climate region. - Cat® Payload for scrapers is an earthmoving solution for optimal payload and jobsite efficiency. Cat Payload achieves on-the-go weighing by using bowl lift cylinder pressure during the loaded haul segment. Cat Payload is optimized to be used with Sequence Assist, which provides increased productivity with less operator
effort. - Enhance productivity through the usage of Cat Payload with
Sequence Assist.
Work in Comfort
Work in comfort
- Reduce up to 14 individual operator commands per cycle with Sequence Assist.
- Steer with less effort using the newly designed high-pressure steering system.
- Enjoy interior improvements and a more ergonomic work
environment with a 21% larger cab than the G Series cab. - Intuitive, ergonomic controls keep operators focused on their work.
- Maintain desired cab temperature with automatic temperature control.
Designed for Safety
Enhance an operator’s awareness of site surroundings with the work area vision system (WAVS).- Get in and out of the cab easier with the new powered access ladder system (optional attachment).
- Seat belt indicator provides visual and audible alerts when the seatbelt is not in use.
- Advanced Cushion Hitch allows the cushion hitch to prevent endstroke by predicting endstroke events and managing the rate of dampening, resulting in reduced hitch maintenance and improved operator ride in rough conditions.
- The fuel fill, fuel filter, engine oil filter, engine oil change, and water drain are easily accessible at ground level.
Easy to Operate
- The spacious cab features easy, intuitive controls and excellent visibility
. The cab provides a comfortable working environment for all-day
operation.
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
- Monitor, manage, and enhance jobsite operations.
- Hit the target grade faster and more accurately with Cat Grade technologies. Finish jobs in fewer passes and with less operator effort, saving you time and helping to increase profit.
- Product Link™ collects machine data that can be viewed online through web and mobile applications (optional attachment).
- Access information anytime, anywhere with VisionLink® – use it to make informed decisions that boost productivity, lower costs, simplify maintenance, and improve safety and security on your
jobsite. - Shorten the learning curve for inexperienced operators with
Sequence Assist and Load Assist (included with Cat Grade
attachment).
Execute Efficiency
- The new tractor hydraulic on -demand fan helps assist in lower fuel consumption.
- Using draft-arm overflow guards diverts material away from the bowl, preventing material from getting caught between the draft arms and the bowl sides.
- Cat Grade (optional attachment) intelligently ensures the machine does not cut below grade in a cut area or overfill in the fill area.
Complete Specifications
Engine
| Name | Type | Value | Unit Value (Imperial) | Unit Name | Unit Value (Metric) | Unit Name (Metric) |
|---|---|---|---|---|---|---|
| Emissions | text | Cat® C18 engine meets U.S. EPA Tier 4 Final/EU Stage IV emission standards. | ||||
| Engine Model - Tractor | text | Cat® C18 | ||||
| Rated Engine RPM - Tractor | measurement | 1900 | r/min | 1900 | r/min | |
| Flywheel Power - Tractor | measurement | 570 | hp | 425 | kW | |
| Overall Width | measurement | 12.11 | ft | 3.94 | m | |
| Overall Shipping Height | measurement | 12.9 | ft | 3.89 | m | |
| Scraper Capacity - Struck | measurement | 24 | yd³ | 18.3 | m³ | |
| Scraper Capacity - Heaped | measurement | 34 | yd³ | 26 | m³ | |
| Rated Load | text | 37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons) | ||||
| Width - Cut | measurement | 17.7 | ft | 3.51 | m | |
| Maximum Depth of Cut | measurement | 12.4 | in | 450 | mm | |
| Maximum Depth of Spread | measurement | 21.1 | in | 535 | mm | |
| Top Speed - Loaded | measurement | 34.7 | mile/h | 55.8 | km/h | |
| 180° Curb-to-Curb Turning Width | measurement | 40.12 | ft | 12.23 | m | |
| Tires - Scraper | text | 37.25R35**E3 | ||||
| Tires - Tractor | text | 37.25R35**E3 | ||||
| Flywheel Power - Tractor/Scraper | measurement | 570 | hp | 425 | kW | |
| Scraper Capacity - Heaped | measurement | 34 | yd³ | 26 | m³ | |
| Top Speed - Loaded | measurement | 34.7 | mile/h | 55.8 | km/h | |
| Transmission Gear - First | measurement | 3.4 | mile/h | 5.5 | km/h | |
| Transmission Gear - Second | measurement | 6.2 | mile/h | 10.0 | km/h | |
| Transmission Gear - Third | measurement | 7.7 | mile/h | 12.4 | km/h | |
| Transmission Gear - Fourth | measurement | 10.5 | mile/h | 16.9 | km/h | |
| Transmission Gear - Fifth | measurement | 14.1 | mile/h | 22.7 | km/h | |
| Transmission Gear - Sixth | measurement | 19.0 | mile/h | 30.6 | km/h | |
| Transmission Gear - Seventh | measurement | 25.7 | mile/h | 41.4 | km/h | |
| Transmission Gear - Eighth | measurement | 34.7 | mile/h | 55.8 | km/h | |
| Transmission Gear - Reverse | measurement | 6.2 | mile/h | 9.9 | km/h | |
| Real Wheels (Each) | measurement | 2.37 | gal (US) | 9.0 | l | |
| Crankcase - Tractor | measurement | 13.7 | gal (US) | 52 | l | |
| Transmission System | measurement | 29 | gal (US) | 110 | l | |
| Cooling System | measurement | 18.75 | gal (US) | 71 | l | |
| Fuel Tank | measurement | 231 | gal (US) | 874 | l | |
| Hydraulic System | measurement | 37.5 | gal (US) | 142 | l | |
| Diesel Exhaust Fluid (DEF) | measurement | 8 | gal (US) | 30.5 | l | |
| Windshield Washer Reservoir | measurement | 1.3 | gal (US) | 5.0 | l | |
| Differential | measurement | 40.41 | gal (US) | 153.0 | l | |
| Final Drive - Each | measurement | 8.71 | gal (US) | 33.0 | l | |
| Width - Overall Machine | measurement | 155 | in | 3937 | mm | |
| Width - Overall Machine - Ladder Down | measurement | 159.3 | in | 4045 | mm | |
| Width - Tractor | measurement | 144.2 | in | 3662 | mm | |
| Width - Rear Tire Centers | measurement | 96.9 | in | 2462 | mm | |
| Width - Inside of Bowl | measurement | 134 | in | 3404 | mm | |
| Width - Outside Bowl - Shipping Width | measurement | 143.1 | in | 3635 | mm | |
| Height - Overall Shipping | measurement | 153.2 | in | 3892 | mm | |
| Height - Top of Cab | measurement | 149.8 | in | 3805 | mm | |
| Front of Tractor to Front Axle | measurement | 142.0 | in | 3608 | mm | |
| Ground Clearance - Tractor | measurement | 26.1 | in | 664 | mm | |
| Axle to Vertical Hitch Pin | measurement | 20 | in | 509 | mm | |
| Height - Scraper Blade Maximum | measurement | 20 | in | 510 | mm | |
| Wheel Base | measurement | 346.8 | in | 8808 | mm | |
| Length - Overall Machine - Standard | measurement | 596.8 | in | 15160 | mm | |
| Length - Maximum (Push-Pull) | measurement | 655.2 | in | 16643 | mm | |
| Rear Axle - Rear of Machine | measurement | 108 | in | 2744 | mm | |
| Overall Length | measurement | 49.34 | ft | 15.04 | m | |
| Operating Weight - Empty | measurement | 102750 | lb | 46600 | kg | |
| Operating Weight - Empty | measurement | 106430 | lb | 48275 | kg | |
| Overall Length - With Bail Down | measurement | 54.59 | ft | 16.64 | m | |
| Exterior Sound Level | text | The exterior sound power level for the standard machine (ISO 6393) is 116 dB(A). | ||||
| ROPS/FOPS | text | ROPS/FOPS meet “ISO Standards.” | ||||
| Steering System | text | ISO 5010:2007 | ||||
| Falling Object Protective Structure (FOPS) | text | ISO 3449:2005 Level II | ||||
| Rollover Protection Structure (ROPS) | text | ISO 3471:2008 for up to 21 282 kg (46,919 lb) | ||||
| Seat Belt | text | SAE J386:FEB2006 | ||||
| Reverse Alarm | text | ISO 9533:2010 | ||||
| Brakes | text | ISO 3450:2011 | ||||
| Bowl Raise | measurement | 3.5 | s | 3.5 | s | |
| Bowl Lower | measurement | 3.5 | s | 3.5 | s | |
| Apron Raise | measurement | 4.0 | s | 4.0 | s | |
| Apron Lower | measurement | 3.8 | s | 3.8 | s | |
| Ejector Extend | measurement | 8.5 | s | 8.5 | s | |
| Ejector Retract | measurement | 8.5 | s | 8.5 | s | |
| Bail Raise | measurement | 1.5 | s | 1.5 | s | |
| Bail Lower | measurement | 2.1 | s | 2.1 | s | |
| Width - Outside Rear Tires | measurement | 143.2 | in | 3636 | mm | |
| Fuel Tank Refill Capacity - Scraper | measurement | 231 | gal (US) | 874 | l |
Standard Equipment
NOTE
- Standard and optional equipment may vary. Consult your Cat dealer for details.
POWER TRAIN – TRACTOR
- Cat® C18
- Compression engine brake
- Electric start, 24V
- Air cleaner, dry type with precleaner
- Fan, hydraulic
- Ground level engine shutdown
- Radiator, aluminum unit core, 9 fins per inch
- Guard, crankcase
- Starting aid, ether
- Braking system:Primary and secondary, wet disc, hydraulicParking, hydraulic-released, spring-appliedThrottle lock
- Transmission:8-speed planetary power shiftECPC controlAPECS softwareProgrammable top gear selectionTransmission holdDifferential lockGuard, power trainStandard tire spin reductionGround speed controlMachine speed limitDifferential lock protection
POWER TRAIN – SCRAPER
- Braking system:Primary and secondary, dry caliper, hydraulic actuated
ELECTRICAL – TRACTOR
- Alternator, 150 Amp
- Batteries (4), 12V, 1,000 CCA, maintenance free, high output
- Electrical system, 24V
- Lighting system:Headlights, LEDTurn signals with hazard function, LED floodlights, (2) cutting edge (1) bowl, halogen side vision (2)
- Starting/charging receptacle
ELECTRICAL – SCRAPER
- Alarm, backup
- Lighting system:Brake lights, LEDTurn signals with hazard function, LED
OPERATOR ENVIRONMENT – TRACTOR
- 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
- Mirror, rearview
- Radio ready
- ROPS/FOPS cab, pressurized
- Keypad switches:Throttle lockWipers/washersHazard lightsRetarding level selectWork lights on, offInformation mode on Messenger Display
- Safety tab rocker switches
- Seat belt, static two-piece
- Seat, Cat Advanced Ride Management (ARM), Cat Comfort Series 3, rotates 30 degrees
- Steering wheel, tilt, telescoping, padded
- Windows, right side emergency egress
- Windows, sliding
- Windows, laminated, zipped in
- Windshield wipers, front and rear windows, includes washers
- Door lock
- Messenger Display
- Gauges, warnings include:Coolant temperatureEngine oil temperatureHydraulic oil temperatureDiesel Particulate Filter (DPF) temperatureFuel levelPark brakeImplement lockoutBrake systemRegeneration requiredThrottle lockSystem voltageSecondary steeringBail downEjector autoDifferential lockApron floatTransmission holdCushion hitchHigh beam lightsAction lampEngine speed, rpmGear selectionDEF fill levels
FLUIDS
- Extended Life Coolant to –37° C (–34° F)
OTHER STANDARD EQUIPMENT – TRACTOR
- Advanced cushion hitch
- Accumulators (cushion hitch) with Canadian Registration Number (CRN)
- Fast oil change
- Fenders, non-metallic
- Heater, engine coolant 120V
- Rims (2)
- Tow hooks, front
- Vandalism locks
- Heater, engine coolant 120V
- Steering locks
OTHER STANDARD EQUIPMENT – SCRAPER
- Bowl:18.3 m3 (24 yd3), struck26 m3 (34 yd3), heaped
- Vandalism locks
- Rims (2)
- Hydraulic position sensing cylinders (bowl lift and apron)
Optional Equipment
NOTE
- Standard and optional equipment may vary. Consult your Cat dealer for details.
STEERING ARRANGEMENTS
- Secondary Steering Arrangement
INTEGRATED TECHNOLOGIES
- Sequence Assist Arrangement with Payload Estimator
- Load Assist
- Cat Grade Control with Load Assist
- Advanced Tire Spin Reduction
OTHER ATTACHMENTS
- Camera arrangement – Work Area Vision System (WAVS)
- Cab beacon
- Air horn
- Air horn and beacon
- Fender, scraper
- Guard, overflow
- Wiring group
- Push Pull
SERVICE INSTRUCTIONS
- Film arrangement – U.S. (ANSI)
- Film arrangement – International (ISO)