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637G Wheel Tractor Scraper

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 at the lowest cost per ton.

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SPECIFICATION SUMMARY
  • Flywheel Power: Tractor/Scraper 373 kW (500 hp) / 211 kW (283 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) / 211 kW (283 hp)
  • Net Power
    345 kW (462 hp) / 373 kW (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) / 211 kW (283 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 - 637G
    81000 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
    3.4 mph
  • 2 Forward
    6.2 mph
  • 3 Forward
    7.6 mph
  • 4 Forward
    10.3 mph
  • 5 Forward
    13.8 mph
  • 6 Forward
    18.7 mph
  • 7 Forward
    25.2 mph
  • 8 Forward
    34.1 mph
  • Reverse
    6.2 mph
  • Top Speed - Loaded
    33 mile/h
  • 1 Forward
    3.4 mile/h
  • 2 Forward
    6.2 mile/h
  • 3 Forward
    7.6 mile/h
  • 4 Forward
    10.3 mile/h
  • 5 Forward
    13.8 mile/h
  • 6 Forward
    18.7 mile/h
  • 7 Forward
    25.2 mile/h
  • 8 Forward
    34.1 mile/h
  • Reverse
    6.2 mile/h

Engine

  • Tractor Engine
    Cat C18 ACERT™
  • Scraper Engine
    Cat C9 ACERT™
  • Tractor Engine
    Cat C18 ACERT™
  • Scraper Engine
    Cat C9 ACERT™

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
  • Extended Push Block (push-pull)
    108.0 in
  • Width - Outside Bowl - Shipping Width
    154 in
  • Bail Length - Maximum (Push-Pull)
    195.3 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
  • Extended Push Block (Push-Pull)
    108 in

Steering

  • Width - 180° Turn
    40.02 ft
  • Steering Angle - Right
    90°
  • Steering Angle - Left
    85°
  • Hydraulic Output
    100.0 gal/min
  • Width - 180° Turn - Right
    40.1 ft
  • Width - 180° Turn
    40.02 ft
  • Steering Angle - Right
    90°
  • Steering Angle - Left
    85°
  • Hydraulic Output
    100 gal/min

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 - 637G
    335 gal (US)
  • Wheel Coolant - Each
    19.8 gal (US)
  • Windshield Washer
    1.5 gal (US)
  • Cooling System
    29 gal (US)
  • Differential
    39 gal (US)
  • Final Drive - Each
    6.1 gal (US)
  • Hydraulic Reservoir
    50.2 gal (US)
  • Transmission
    29 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

Scraper Engine

  • Net Power
    198 kW (266 hp) / 211 kW (283 hp)
  • Gross Power - Gear 1
    286 HP
  • Gross Power - Gears 2-4
    303 HP
  • Net Power - Gear 1
    266 HP
  • Net Power - Gears 2-4
    283 HP
  • Bore
    4.4 in
  • Stroke
    5.9 in
  • Displacement
    538 in³

Weights - Standard, Tandem

  • Total Shipping
    112760 lb
  • Tractor Shipping
    66529 lb
  • Scraper Shipping
    46231 lb
  • Total Operating - Empty
    114744 lb
  • Front Axle
    67700 lb
  • Rear Axle
    47044 lb
  • Total Operating - Loaded
    196944 lb
  • Front Axle Weight - Loaded
    96503 lb
  • Rear Axle - Weight - Loaded
    100441 lb

Weights - Push-Pull

  • Total Shipping
    116100 lb
  • Tractor Shipping
    68499 lb
  • Scraper Shipping
    47601 lb
  • Total Operating - Empty
    118084 lb
  • Front Axle
    69670 lb
  • Rear Axle
    48414 lb
  • Total Operating - Loaded
    200284 lb
  • Front Axle - Loaded
    98139 lb
  • Rear Axle - Loaded
    102145 lb

Service Refill Capacities - Scraper

  • Fuel Tank - 637G
    335 gal (US)
  • Crankcase
    7.9 gal (US)
  • Transmission
    19 gal (US)
  • Differential
    3.2 gal (US)
  • Final Drive - Each
    5 gal (US)
  • Wheel Coolant - Each
    19.8 gal (US)
  • Cooling System
    20 gal (US)

Transmission - 637G

  • 1 Forward
    3.4 mile/h
  • 2 Forward
    6.2 mile/h
  • 3 Forward
    7.6 mile/h
  • 4 Forward
    10.3 mile/h
  • 5 Forward
    13.8 mile/h
  • 6 Forward
    18.7 mile/h
  • 7 Forward
    25.2 mile/h
  • 8 Forward
    34.1 mile/h
  • Reverse
    6.2 mile/h

Power Train - Engine

Power Train - Transmission

Structures

Operator Station

Electronic Controls

Scraper Bowl

Push-Pull Arrangement

Auger Arrangement

Serviceability

Customer Support

Standard Equipment:

  • Electrical
    • Alarm, backup
    • Alternator, 75 amp - tractor engine
    • Alternator, 35 amp - scraper engine
    • Batteries (4), 12V Maintenance Free, High Output
    • Batteries (2), 12V Maintenance Free, High Output
    • Electrical System, 24V
    • Lighting System - Tractor
    • Lighting System - Scraper
    • Starting Receptacle - tractor and scraper engines
  • 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
    • Scraper Engine Controls
    • 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:
    • Scraper:

Optional Equipment: