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.
Caterpillar
631 Wheel Tractor-Scraper
Overview
Photos
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631 Open Bowl Scraper -
631 Open Bowl Scraper -
631 Open Bowl Scraper
Videos
360° View
Exterior
360 Exterior View
Interior
360 Interior View
Specifications
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General
Spec Value Top Speed - Loaded 34.7 mile/h 180° Curb-to-Curb Turning Width 40.12 ft Width - Cut 11.5 ft Maximum Depth of Cut 17.7 in Tires - Scraper 37.25R35**E3 Overall Width 12.93 ft Scraper Capacity - Struck 24 yd³ Scraper Capacity - Heaped 34 yd³ Tires - Tractor 37.25R35**E3 Fuel Tank Refill Capacity - Scraper 231 gal (US) Rated Load 37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons) Overall Shipping Height 12.75 ft Maximum Depth of Spread 21.1 in -
Engine
Spec Value Engine Model - Tractor Cat C18 Rated Engine RPM - Tractor 1900 r/min Flywheel Power - Tractor 570 hp Emissions Cat C18 engine meets U.S. EPA Tier 4 Final/EU Stage IV emission standards. -
Tractor Engine
Spec Value Flywheel Power - Tractor/Scraper 570 hp -
Scraper Bowl
Spec Value Scraper Capacity - Heaped 34 yd³ -
Transmission
Spec Value Top Speed - Loaded 34.7 mile/h -
Service Refill Capacities
Spec Value Hydraulic System 37.5 gal (US) Transmission System 29 gal (US) Cooling System 19.8 gal (US) Diesel Exhaust Fluid (DEF) 8 gal (US) Fuel Tank 231 gal (US) Crankcase - Tractor 13.7 gal (US) -
Dimensions
Spec Value Front of Tractor to Front Axle 142.2 in Axle to Vertical Hitch Pin 20 in Wheel Base 346.8 in Rear Axle - Rear of Machine 108 in Width - Inside of Bowl 134 in Ground Clearance - Tractor 26.1 in Length - Maximum (Push-Pull) 655.1 in Width - Rear Tire Centers 96.9 in Height - Scraper Blade Maximum 20 in Width - Outside Rear Tires 143.2 in Length - Overall Machine - Standard 597 in Width - Overall Machine 155 in Height - Top of Cab 147 in Width - Tractor 137.8 in Height - Overall Shipping 153.2 in -
Non Push-Pull
Spec Value Operating Weight - Empty 102750 lb Overall Length 49.34 ft -
Push-Pull
Spec Value Overall Length - With Bail Down 54.59 ft Operating Weight - Empty 106430 lb -
Cab
Spec Value ROPS/FOPS ROPS/FOPS meet “ISO Standards.” Exterior Sound Level The exterior sound power level for the standard machine (ISO 6393) is 111.5 dB(A). -
Safety Criteria Compliance Standards
Spec Value Seat Belt SAE J386:FEB2006 Falling Object Protective Structure (FOPS) ISO 3449:2005 Level II Rollover Protection Structure (ROPS) ISO 3471:2008 for up to 21 282 kg (46,919 lb) Brakes ISO 3450:2011 Steering System ISO 5010:2007 Reverse Alarm ISO 9533:2010 -
Travel Speeds - Runout
Spec Value Transmission Gear - Reverse 6.2 mile/h Transmission Gear - Sixth 19 mile/h Transmission Gear - First 3.4 mile/h Transmission Gear - Second 6.2 mile/h Transmission Gear - Seventh 25.7 mile/h Transmission Gear - Fifth 14.1 mile/h Transmission Gear - Third 7.7 mile/h Transmission Gear - Eighth 34.7 mile/h Transmission Gear - Fourth 10.5 mile/h -
Implement Cycle Times
Spec Value Apron Raise 4 s Ejector Extend 8.5 s Bowl Lower 3.5 s Ejector Retract 8.5 s Bail Raise 1.5 s Bowl Raise 3.5 s Apron Lower 3.8 s Bail Lower 2.1 s
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, 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, 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, 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
- Diesel Particulate Filter (DPF) temperature
- Fuel level
- Park brake
- Implement lockout
- Brake system
- Regeneration required
- 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
- DEF 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), struck
- 26 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)