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631G Scrapers

Quick loading, high travel speeds and the ability to load and dump on the run yield fast cycle times, allowing Caterpillar® Wheel Tractor-Scrapers to consistently deliver high productivity.

Download specification sheet

Overview and Specifications

Tractor Engine
Displacement 1105 in3 / 18.1 L
Net Power - Gears 1-2 462 hp / 345 kW
Net Power - Gears 3-8 500 hp / 373 kW
Gross Power - Gears 1-2 488 hp / 364 kW
Gross Power - Gears 3-8 526 hp / 392 kW
Bore 5.7 in / 145 mm
Stroke 7.2 in / 183 mm
Net Power - Tractor/Scraper 345 kW (462 hp)
Net Power 345/373 kW 462/500 hp

Weights
Operating Weight 102459.71 lb / 46475 kg

Scraper Bowl
Depth of Cut - max. 17.2 in / 437 mm
Ground Clearance - max. 21.5 in / 545 mm
Cutting Edge - thickness 1.12 in. / 28 mm
Depth of Spread - max. 18.9 in / 480 mm
Apron Opening 79 in / 2007 mm
Apron Closure Force 38250 lb / 170 kN
Capacity Heaped 34 yd3 / 26 m3
Rated Load 82200 lb / 37285 kg
Capacity Struck 24 yd3 / 18.3 m3
Hyd. Penetration Force - 631G 57375 lb / 255 kN
Width of Cut, to Router Bits 138.3 in / 3512 mm

Weights - Standard, tandem
Total Shipping 100005.97 lb / 45362 kg
Total Operating - empty 102459.71 lb / 46475 kg
Front Axle 68647.46 lb / 31138 kg
Rear Axle 33812.26 lb / 15337 kg
Total Operating - loaded 184658.97 lb / 83760 kg
Front Axle Weight - loaded 97869.7 lb / 44393 kg
Rear Axle Weight - loaded 86789.28 lb / 39367 kg

Dimensions
Width - overall machine 155 in / 3938 mm
Width - rear tire center lines 97 in / 2464 mm
Width - inside of bowl 134 in / 3405 mm
Width - outside rear tires 143.2 in / 3636 mm
Height - overall shipping 168.8 in / 4286 mm
Height - top of cab 146.3 in / 3715 mm
Front of Tractor to Front Axle 132.2 in / 3359 mm
Height - scraper blade max. 21.5 in / 545 mm
Wheelbase 345.2 in / 8769 mm
Length - overall machine 573.4 in / 14565 mm
Rear Axle to Rear of Machine 96 in / 2437 mm
Width - tractor 137 in / 3481 mm
Ground Clearance, Tractor 26.2 in / 665 mm
Axle to Vertical Hitch Pin 21.6 in / 548 mm

Transmission
1 Forward 2.9 mph / 4.7 km/h
2 Forward 5.2 mph / 8.4 km/h
4 Forward 10 mph / 16.1 km/h
4 Forward 10 mph / 16.1 km/h
4 Forward 10 mph / 16.1 km/h
3 Forward 7.4 mph / 11.9 km/h
3 Forward 7.4 mph / 11.9 km/h
3 Forward 7.4 mph / 11.9 km/h
5 Forward 13.4 mph / 21.6 km/h
5 Forward 13.4 mph / 21.6 km/h
5 Forward 13.4 mph / 21.6 km/h
6 Forward 18.2 mph / 29.3 km/h
7 Forward 24.5 mph / 39.4 km/h
8 Forward 33.2 mph / 53.5 km/h
Reverse 6.2 mph / 9.9 km/h
Travel Speed Maximum 33.2 mph / 53.5 km/h

Service Refill Capacities - Tractor
Crankcase 11.9 gal / 45 L
Transmission 29 gal / 110 L
Final Drive (per side) 6.1 gal / 23 L
Wheel Coolant (each) 19.8 gal / 75 L
Hydraulic Reservoir 50.2 gal / 190 L
Windshield Washer 1.5 gal / 6 L
Cooling System 29 gal / 110 L
Differential 39 gal / 148 L
Fuel Tank - 631G 215.04 gal / 814 L

Hydraulics
Relief Valve - Steering Circuit 1987 psi / 13700 kPa
Compensator Setting - Cushion Hitch Circuit 2320 psi / 16000 kPa
Bowl Cylinder Stoke 34.4 in / 873 mm
Apron Cylinder Bore 8.2 in / 210 mm
Ejector Cylinder Bore 8.2 in / 210 mm
Steering Circuit 100 gal/min / 379 L/min
Scraper Circuit 91 gal/min / 344 L/min
Secondary Steering Circuit 100 gal/min / 379 L/min
Bowl Cylinder Bore 7.2 in / 184 mm
Relief Valve - Implement Circuit 2030 psi / 14000 kPa
Ejector Cylinder Stroke 74 in / 1880 mm
Cushion Hitch Circuit 9 gal/min / 34.5 L/min
Apron Cylinder Stroke 28.6 in / 727 mm

Transmission - 631G
1 Forward 2.9 mph / 4.7 km/h
2 Forward 5.2 mph / 8.4 km/h
3 Forward 7.4 mph / 11.9 km/h
4 Forward 10 mph / 16.1 km/h
5 Forward 13.4 mph / 21.6 km/h
6 Forward 18.2 mph / 29.3 km/h
6 Forward 18.2 mph / 29.3 km/h
7 Forward 24.5 mph / 39.4 km/h
7 Forward 24.5 mph / 39.4 km/h
8 Forward 33.2 mph / 53.5 km/h
Reverse 6.2 mph / 9.9 km/h

Service Refill Capacities - Scraper
Wheel Coolant (each) 19.8 gal / 75 L
Fuel Tank - 631G 215 gal / 814 L

Steering
Width - 180° Turn 40.02 ft / 12.2 m
Steering Angle - left 85°
Steering Angle - right 90°

Features & Benefits

Power Train – Engine
Power Train – Transmission
Structures
Operator Station
Electronic Controls
Scraper Bowl
Auger Arrangement
Serviceability
Customer Support

For more information, please contact your sales representative.