637G

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.


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


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


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


Scraper Bowl
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
Hyd. Penetration Force - 637G 81000 lb
Depth of Spread - Maximum 18.9 in
Apron Opening 79 in
Apron Closure Force 38250 lb


Transmission
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


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 in
Steering Circuit 100 gal/min
Scraper Circuit 91 gal/min
Cushion Hitch Circuit 9 gal/min
Secondary Steering Circuit 100 gal/min
Relief Valve - Steering Circuit 1987 psi
Relief Valve - Implement Circuit 2030 psi
Compensator Settings - Cushion Hitch Circuit 2320 psi


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


Service Refill Capacities - Tractor
Cooling System 29 gal (US)
Crankcase 11.9 gal (US)
Differential 39 gal (US)
Final Drive - Each 6.1 gal (US)
Fuel Tank - 637G 335 gal (US)
Hydraulic Reservoir 50.2 gal (US)
Transmission 29 gal (US)
Wheel Coolant - Each 19.8 gal (US)
Windshield Washer 1.5 gal (US)


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


Dimensions
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
Width - Outside Bowl - Shipping Width 154 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
Bail Length - Maximum (Push-Pull) 195.3 in
Extended Push Block (Push-Pull) 108 in


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


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


BENEFITS & FEATURES
Power Train - Engine



Power Train - Transmission



Structures



Operator Station



Electronic Controls



Scraper Bowl



Push-Pull Arrangement



Auger Arrangement



Serviceability



Customer Support



EQUIPMENT
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:


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