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631K Wheel Tractor-Scraper

631K Wheel Tractor-Scraper

At a Glance

Flywheel Power - Tractor/Scraper
570 HP
Scraper Capacity - Heaped
34 yd³
Top Speed - Loaded
34.7 mile/h
Front of Tractor to Front Axle
142.2 in
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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.

Tractor Engine

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Flywheel Power - Tractor/Scraper 570HP

Scraper Bowl

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Scraper Capacity - Heaped 34yd³


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Top Speed - Loaded 34.7mile/h


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Front of Tractor to Front Axle 142.2in
Axle to Vertical Hitch Pin 20in
Wheel Base 346.8ft
Rear Axle - Rear of Machine 108in
Length - Maximum (Push-Pull) 655.1in
Ground Clearance - Tractor 26.1in
Height - Overall Shipping 153.2in
Height - Scraper Blade Maximum 20in
Height - Top of Cab 147in
Length - Overall Machine - Standard 597in
Width - Inside of Bowl 134in
Width - Outside Rear Tires 143.2in
Width - Overall Machine 155in
Width - Rear Tire Centers 96.9in
Width - Tractor 137.8in


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Engine Model - Tractor Cat C18
Rated Engine RPM - Tractor 1900r/min
Emissions Cat C18 engine meets U.S. EPA Tier 4 Final/EU Stage IV emission standards.
Flywheel Power - Tractor 570HP


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Operating Weight - Empty 106430lb
Overall Length - With Bail Down 54.59ft

Non Push-Pull

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Operating Weight - Empty 102750lb
Overall Length 49.34ft


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180° Curb-to-Curb Turning Width 40.12ft
Fuel Tank Refill Capacity - Scraper 231gal (US)
Maximum Depth of Cut 17.7in
Maximum Depth of Spread 21.1in
Overall Shipping Height 12.75ft
Overall Width 12.93ft
Rated Load 37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons)
Scraper Capacity - Heaped 34yd³
Scraper Capacity - Struck 24yd³
Tires - Scraper 37.25R35**E3
Tires - Tractor 37.25R35**E3
Top Speed - Loaded 34.7mile/h
Width - Cut 11.5ft

Service Refill Capacities

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Cooling System 19.8gal (US)
Crankcase - Tractor 13.7gal (US)
Diesel Exhaust Fluid (DEF) 8gal (US)
Fuel Tank 231gal (US)
Hydraulic System 37.5gal (US)
Transmission System 29gal (US)


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Exterior Sound Level The exterior sound power level for the standard machine (ISO 6393) is 111.5 dB(A).
ROPS/FOPS ROPS/FOPS meet “ISO Standards.”

Safety Criteria Compliance Standards

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Brakes ISO 3450:2011
Falling Object Protective Structure (FOPS) ISO 3449:2005 Level II
Reverse Alarm ISO 9533:2010
Rollover Protection Structure (ROPS) ISO 3471:2008 for up to 21 282 kg (46,919 lb)
Seat Belt SAE J386:FEB2006
Steering System ISO 5010:2007

Travel Speeds - Runout

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Transmission Gear - Eighth 34.7mile/h
Transmission Gear - Fifth 14.1mile/h
Transmission Gear - First 3.4mile/h
Transmission Gear - Fourth 10.5mile/h
Transmission Gear - Reverse 6.2mile/h
Transmission Gear - Second 6.2mile/h
Transmission Gear - Seventh 25.7mile/h
Transmission Gear - Sixth 19mile/h
Transmission Gear - Third 7.7mile/h

Implement Cycle Times

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Apron Lower 3.8s
Apron Raise 4s
Bail Lower 2.1s
Bail Raise 1.5s
Bowl Lower 3.5s
Bowl Raise 3.5s
Ejector Extend 8.5s
Ejector Retract 8.5s