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631G Wheel Tractor Scraper

Caterpillar Wheel Tractor-Scrapers offer fast cycle times, with quick loading, high travel speeds and the ability to load and dump on the run. Rugged construction and easy maintenance assure long life with low operating costs.

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SPECIFICATION SUMMARY
  • Flywheel Power: Tractor/Scraper 373 kW (500 hp)
  • Scraper Capacity: Heaped 34.0 yd3
  • Top Speed (Loaded) 33.0 mph
  • Tractor Engine Cat® C18 ACERT™

PRICE (USD)
Call 800-637-5000 for rate information

Tractor Engine

  • Flywheel Power: Tractor/Scraper
    373 kW (500 hp)
  • Net Power
    345/373 kW 462/500 hp
  • Gross Power - Gears 1-2
    488 HP
  • Gross Power - Gears 3-8
    526 HP
  • Net Power - Gears 1-2
    462 HP
  • Net Power - Gears 3-8
    500 HP
  • Bore
    5.7 in
  • Stroke
    7.2 in
  • Displacement
    1105 in³
  • Flywheel Power - Tractor/Scraper
    373 kW (500 hp)

Scraper Bowl

  • Scraper Capacity: Heaped
    34.0 yd3
  • Rated Load
    82200.0 lb
  • Capacity Struck
    24.0 yd3
  • Depth of Cut - max.
    17.2 in
  • Width of Cut, to Router Bits
    138.3 in
  • Ground Clearance - max.
    21.5 in
  • Cutting Edge - thickness
    1.12 in.
  • Depth of Spread - max.
    18.9 in
  • Apron Opening
    79.0 in
  • Hyd. Penetration Force - 631G
    57375 lb
  • Apron Closure Force
    38250 lb
  • Scraper Capacity - Heaped
    34 yd³
  • Rated Load
    82200 lb
  • Capacity - Struck
    24 yd³
  • Depth of Cut - Maximum
    17.2 in
  • Width - Cut - To Router Bits
    138.3 in
  • Ground Clearance - Maximum
    21.5 in
  • Cutting Edge Thickness
    1.12 in
  • Depth of Spread - Maximum
    18.9 in
  • Apron Opening
    79 in

Transmission

  • Top Speed (Loaded)
    33.0 mph
  • 1 Forward
    2.9 mph
  • 2 Forward
    5.2 mph
  • 3 Forward
    7.4 mph
  • 4 Forward
    10.0 mph
  • 5 Forward
    13.4 mph
  • 6 Forward
    18.2 mph
  • 7 Forward
    24.5 mph
  • 8 Forward
    33.2 mph
  • Reverse
    6.2 mph
  • Top Speed - Loaded
    33 mile/h
  • 1 Forward
    2.9 mile/h
  • 2 Forward
    5.2 mile/h
  • 3 Forward
    7.4 mile/h
  • 4 Forward
    10 mile/h
  • 5 Forward
    13.4 mile/h
  • 6 Forward
    18.2 mile/h
  • 7 Forward
    24.5 mile/h
  • 8 Forward
    33.2 mile/h
  • Reverse
    6.2 mile/h

Engine

  • Tractor Engine
    Cat® C18 ACERT™
  • Tractor Engine
    Cat® C18 ACERT™

Weights

  • Operating Weight
    102459.71 lb
  • Operating Weight
    102459.71 lb

Dimensions

  • Width - Overall Machine
    155.0 in
  • Width - Tractor
    137.0 in
  • Width - rear tire center lines
    97.0 in
  • Width - Inside of Bowl
    134.0 in
  • Width - Outside Rear Tires
    143.2 in
  • Height - Overall Shipping
    168.8 in
  • Height - Top of Cab
    146.3 in
  • Ground Clearance - Tractor
    26.2 in
  • Front of Tractor to Front Axle
    132.2 in
  • Axle to Vertical Hitch Pin
    21.6 in
  • Height - Scraper Blade Maximum
    21.5 in
  • Wheelbase
    345.2 in
  • Length - overall machine
    573.4 in
  • Rear Axle to Rear of Machine
    95.97 in
  • Width - Overall Machine
    155 in
  • Width - Tractor
    137 in
  • Width - Rear Tire Center Lines
    97 in
  • Width - Inside of Bowl
    134 in
  • Width - Outside Rear Tires
    143.2 in
  • Height - Overall Shipping
    168.8 in
  • Height - Top of Cab
    146.3 in
  • Ground Clearance - Tractor
    26.2 in
  • Front of Tractor to Front Axle
    132.2 in
  • Axle to Vertical Hitch Pin
    21.6 in
  • Height - Scraper Blade Maximum
    21.5 in
  • Wheel Base
    345.2 in
  • Length - Overall Machine
    573.4 in
  • Rear Axle - Rear of Machine
    95.97 in

Steering

  • Width - 180° Turn
    40.02 ft
  • Steering Angle - Right
    90°
  • Steering Angle - Left
    85°
  • Width - 180° Turn
    40.02 ft
  • Steering Angle - Right
    90°
  • Steering Angle - Left
    85°

Service Refill Capacities - Tractor

  • Transmission
    29.0 gal
  • Differential
    39.0 gal
  • Final Drive (per side)
    6.1 gal
  • Cooling System
    29.0 gal
  • Hydraulic Reservoir
    50.2 gal
  • Crankcase
    11.9 gal (US)
  • Fuel Tank - 631G
    215.04 gal (US)
  • Wheel Coolant - Each
    19.8 gal (US)
  • Windshield Washer
    1.5 gal (US)
  • Transmission
    29 gal (US)
  • Differential
    39 gal (US)
  • Final Drive - Each
    6.1 gal (US)
  • Cooling System
    29 gal (US)
  • Hydraulic Reservoir
    50.2 gal (US)

Hydraulics

  • Bowl Cylinder Bore
    7.2 in
  • Bowl Cylinder Stroke
    34.4 in
  • Apron Cylinder Bore
    8.2 in
  • Apron Cylinder Stroke
    28.6 in
  • Ejector Cylinder Bore
    8.2 in
  • Ejector Cylinder Stroke
    74.0 in
  • Steering Circuit
    100.0 gal/min
  • Scraper Circuit
    91.0 gal/min
  • Cushion Hitch Circuit
    9.0 gal/min
  • Relief Valve - Steering Circuit
    1987.0 psi
  • Relief Valve - Implement Circuit
    2030.0 psi
  • Compensator Setting - Cushion Hitch Circuit
    2320.0 psi
  • Secondary Steering Circuit
    100 gal/min
  • Bowl Cylinder Bore
    7.2 in
  • Bowl Cylinder Stroke
    34.4 in
  • Apron Cylinder Bore
    8.2 in
  • Apron Cylinder Stroke
    28.6 in
  • Ejector Cylinder Bore
    8.2 in
  • Ejector Cylinder Stroke
    74 in
  • Steering Circuit
    100 gal/min
  • Scraper Circuit
    91 gal/min
  • Cushion Hitch Circuit
    9 gal/min
  • Relief Valve - Steering Circuit
    1987 psi
  • Relief Valve - Implement Circuit
    2030 psi
  • Compensator Settings - Cushion Hitch Circuit
    2320 psi

Weights - Standard, Tandem

  • Total Shipping
    100005.97 lb
  • Total Operating - Empty
    102459.71 lb
  • Front Axle
    68647.46 lb
  • Rear Axle
    33812.26 lb
  • Total Operating - Loaded
    184658.97 lb
  • Front Axle Weight - Loaded
    97869.7 lb
  • Rear Axle - Weight - Loaded
    86789.28 lb

Service Refill Capacities - Scraper

  • Wheel Coolant - Each
    19.8 gal (US)

Transmission - 631G

  • 1 Forward
    2.9 mile/h
  • 2 Forward
    5.2 mile/h
  • 3 Forward
    7.4 mile/h
  • 4 Forward
    10 mile/h
  • 5 Forward
    13.4 mile/h
  • 6 Forward
    18.2 mile/h
  • 7 Forward
    24.5 mile/h
  • 8 Forward
    33.2 mile/h
  • Reverse
    6.2 mile/h

Power Train - Engine

Power Train - Transmission

Structures

Operator Station

Electronic Controls

Scraper Bowl

Serviceability

Customer Support

Standard Equipment:

  • Electrical
    • Alarm, backup
    • Alternator, 75 amp
    • Batteries (4), 12V Maintenance Free, High Output
    • Electrical System, 24V
    • Lighting System
    • Starting Receptacle
  • Operator Environment
    • Air Conditioner (includes heater and defroster)
    • Cigarette Lighter and Ashtray
    • Coat Hook
    • Diagnostic Connection Port (12V)
    • Dome Courtesy Light
    • Gauge Group
    • Horn
    • Implement Control Joystick
    • Rearview Mirrors
    • Radio Ready (two radio openings, speakers, and 5-amp converter)
    • ROPS Cab with Sound Suppression and Pressurization
    • Static Seatbelt
    • Seat, Air Suspension, Caterpillar Comfort, cloth
    • Steering Wheel - tilt and telescoping
    • Storage Compartment
    • Throttle Lock
    • Transmission Hold
    • Windows - sliding side, swing out
    • Windshield - laminated glass
    • Windshield Wiper/Washer - front and rear
  • Power Train
    • Engine
    • Braking System
    • Transmission
  • Other Standard Equipment
    • Extended Life Coolant, -36° C (-33° F)
    • Fan hub, permanent lube
    • Fast Oil Change
    • Fenders
    • Rims - 35 inch (2)
    • Tires, 37.50-R35 radial
    • Tractor:

Optional Equipment:

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