Tractor Engine
| Flywheel Power - Tractor/Scraper | 570 hp 425 kW |
Open Bowl Scrapers 631 - Tier 2
Request A Price Find DealerKey Specs
- 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
Overview
Delivers results
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.
Benefits
Increased Comfort
Ergonomic controls and a newly redesigned cab interior provide a more comfortable and efficient working environment all day long
Up To 8% More Productivity
Improvements in fuel efficiency and the new APECS transmission controls deliver more productivity in most applications
Additional Safety
New safety features help operators be more productive and work more efficiently all day long
Features At A Glance
Be More Productive
• Up to 8% improvement in productivity.• Advanced productivity electronic control system (APECS) allows
the engine and transmission to communicate on a high level. This
communication allows the machine to better utilize 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 replaces top gear selection, allowing the machine to find the correct gear that works best for the engine and transmission. Pulling the load in the correct gear, in most cases, results in lower engine load factor and lower fuel burn.
• Auto-stall assists in quickly bringing the transmission to an operating temperature at startup when the machine is working in a cold climate region.
• Cat®Payload Estimator for scrapers is an earthmoving solution for optimal payload and jobsite efficiency. Payload Estimator achieves on-the-go weighing by using bowl lift cylinder pressure during the loaded haul segment. Payload Estimator is optimized to be used with sequence assist, which provides increased productivity with
less operator effort. Payload Estimator is an automatic feature
when ordered with sequence assist.
Work in Comfort
• Reduce up to 14 individual operator commands per cycle with sequence assist (optional attachment).• Steer with less effort using the newly designed high-pressure
steering system.
• Enjoy interior improvements and a more ergonomic work environment 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
• Get in and out of the cab easier with the new powered accessladder system (optional attachment).
• Enhance an operator’s awareness of site surroundings with the optional work area vision system (WAVS).
• Seat belt indicator provides visual and audible alerts when the seat
belt is not in use.
• Advanced cushion hitch allows the cushion hitch to prevent end stroke by having the ability to predict end stroke events and manage the rate of dampening, resulting in reduced hitch maintenance and improved operator ride in rough conditions.
• Easy ground level access to fuel, water, and engine oil.
Easy to Operate
• The spacious cab features easy, intuitive controls and excellentvisibility. 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 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).• Monitor, manage, and enhance jobsite operations.
• Hit 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).
Execute Efficiency
• The new tractor hydraulic on-demand fan helps assist in lowering 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 Control (optional attachment) intelligently ensures the
machine does not cut below grade in a cut area or overfill in the
fill area.
Product Specifications for 631 - Tier 2
Scraper Bowl
| Scraper Capacity - Heaped | 34 yd³ 26 m³ |
Transmission
| Top Speed - Loaded | 34.7 mile/h 55.8 km/h |
Dimensions
| Front of Tractor to Front Axle | 142.2 in 3612 mm |
| Axle to Vertical Hitch Pin | 20 in 509 mm |
| Wheel Base | 346.8 in 8808 mm |
| Rear Axle - Rear of Machine | 108 in 2744 mm |
| Width - Inside of Bowl | 134 in 3404 mm |
| Height - Overall Shipping | 153.2 in 3892 mm |
| Height - Scraper Blade Maximum | 20 in 510 mm |
| Width - Rear Tire Centers | 96.9 in 2462 mm |
| Width - Outside Rear Tires | 143.2 in 3636 mm |
| Length - Overall Machine - Standard | 597 in 15164 mm |
| Ground Clearance - Tractor | 26.1 in 664 mm |
| Height - Top of Cab | 147 in 3733 mm |
| Length - Maximum (Push-Pull) | 655.1 in 16640 mm |
| Width - Overall Machine | 155 in 3937 mm |
| Width - Tractor | 137.8 in 3499 mm |
General
| Scraper Capacity - Heaped | 34 yd³ 26 m³ |
| Overall Width | 12.93 ft 3.94 m |
| Maximum Depth of Cut | 17.7 in 450 mm |
| 180° Curb-to-Curb Turning Width | 40.12 ft 12.23 m |
| Maximum Depth of Spread | 21.1 in 535 mm |
| Scraper Capacity - Struck | 24 yd³ 18.3 m³ |
| Top Speed - Loaded | 34.7 mile/h 55.8 km/h |
| Width - Cut | 11.50 ft 3.51 m |
| Fuel Tank Refill Capacity - Scraper | 231 gal (US) 874 l |
| Tires - Scraper | 37.25R35**E3 37.25R35**E3 |
| Rated Load | 37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons) 37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons) |
| Overall Shipping Height | 12.75 ft 3.89 m |
| Tires - Tractor | 37.25R35**E3 37.25R35**E3 |
Engine
| Flywheel Power - Tractor | 570 hp 425 kW |
| Rated Engine RPM - Tractor | 1900 r/min 1900 r/min |
| Emissions | Cat C18 engine meets U.S. EPA Tier 2/EU Stage II Equivalent emission standards. Cat C18 engine meets U.S. EPA Tier 2/EU Stage II Equivalent emission standards. |
| Engine Model - Tractor | Cat C18 Cat C18 |
Service Refill Capacities
| Fuel Tank | 231 gal (US) 874 l |
| Hydraulic System | 37.5 gal (US) 142 l |
| Cooling System | 19.8 gal (US) 75 l |
| Crankcase - Tractor | 13.7 gal (US) 52 l |
| Transmission System | 29 gal (US) 110 l |
Non Push-Pull
| Operating Weight - Empty | 102750 lb 46600 kg |
| Overall Length | 49.34 ft 15.04 m |
Push-Pull
| Overall Length - With Bail Down | 54.59 ft 16.64 m |
| Operating Weight - Empty | 106430 lb 48275 kg |
Cab
| ROPS/FOPS | ROPS/FOPS meet “ISO Standards.” ROPS/FOPS meet “ISO Standards.” |
| Exterior Sound Level | The exterior sound power level for the standard machine (ISO 6393) is 111.5 dB(A). The exterior sound power level for the standard machine (ISO 6393) is 111.5 dB(A). |
Safety Criteria Compliance Standards
| Falling Object Protective Structure (FOPS) | ISO 3449:2005 Level II ISO 3449:2005 Level II |
| Seat Belt | SAE J386:FEB2006 SAE J386:FEB2006 |
| Steering System | ISO 5010:2007 ISO 5010:2007 |
| Rollover Protection Structure (ROPS) | ISO 3471:2008 for up to 21 282 kg (46,919 lb) ISO 3471:2008 for up to 21 282 kg (46,919 lb) |
| Reverse Alarm | ISO 9533:2010 ISO 9533:2010 |
| Brakes | Brakes ISO 3450:2011 Brakes ISO 3450:2011 |
Travel Speeds - Runout
| Transmission Gear - Seventh | 25.7 mile/h 41.4 km/h |
| Transmission Gear - Sixth | 19 mile/h 30.6 km/h |
| Transmission Gear - Reverse | 6.2 mile/h 9.9 km/h |
| Transmission Gear - First | 3.4 mile/h 5.5 km/h |
| Transmission Gear - Third | 7.7 mile/h 12.4 km/h |
| Transmission Gear - Second | 6.2 mile/h 10 km/h |
| Transmission Gear - Eighth | 34.7 mile/h 55.8 km/h |
| Transmission Gear - Fifth | 14.1 mile/h 22.7 km/h |
| Transmission Gear - Fourth | 10.5 mile/h 16.9 km/h |
Implement Cycle Times
| Ejector Extend | 8.5 s 8.5 s |
| Bail Raise | 1.5 s 1.5 s |
| Bowl Raise | 3.5 s 3.5 s |
| Ejector Retract | 8.5 s 8.5 s |
| Bail Lower | 2.1 s 2.1 s |
| Bowl Lower | 3.5 s 3.5 s |
| Apron Raise | 4 s 4 s |
| Apron Lower | 3.8 s 3.8 s |
631 - Tier 2 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
- Muffler
- Starting aid, ether
- Braking system:
- Primary and secondary, wet disc, hydraulic
- Parking, hydraulic-released, spring-applied
- Throttle lock
- Transmission:
- 8-speed planetary power shift
- ECPC control
- APECS software
- Programmable top gear selection
- Transmission hold
- Differential lock
- Guard, power train
- Standard tire spin reduction
- Ground speed control
- Machine speed limit
- Differential lock protection
POWER TRAIN – SCRAPER
- Braking system:
- Primary and secondary, wet disc, hydraulic
ELECTRICAL – TRACTOR
- Alternator, 150 Amp
- Batteries (4), 12V, 1,000 CCA, maintenance free, high output
- Electrical system, 24V
- Lighting system:
- Headlights, LED
- Turn 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, LED
- Turn 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 lock
- Wipers/washers
- Hazard lights
- Retarding level select
- Work lights on, off
- Information 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 temperature
- Engine oil temperature
- Hydraulic oil temperature
- Fuel level
- Park brake
- Implement lockout
- Brake system
- Throttle lock
- System voltage
- Secondary steering
- Bail down
- Ejector auto
- Differential lock
- Apron float
- Transmission hold
- Cushion hitch
- High beam lights
- Action lamp
- Engine speed, rpm
- Gear selection
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), struck
- 26 m3 (34 yd3), heaped
- Vandalism locks
- Rims (2)
- Hydraulic position sensing cylinders (bowl lift and apron)
631 - Tier 2 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
- Year of manufacture plate
SERVICE INSTRUCTIONS
- Film arrangement – International (ISO)
See how 631 - Tier 2 compares against frequently compared products.
Wheel Tractor-Scrapers
631 - Tier 2
Selected
- 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
621
- Flywheel Power - Tractor/Scraper
- 304 kW (407 hp)
- 304 kW (407 hp)
- Scraper Capacity - Heaped
- 24 yd³
- 18.4 m³
- Top Speed - Loaded
- 33.5 mile/h
- 53.9 km/h
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
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