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Open Bowl Scrapers

Cat Wheel Tractor-Scrapers have the power, traction, and speed for reliable output in a variety of applications. Scraper options include single- and tandem-engine open bowls, tandem engine push-pulls, elevators, and auger arrangements.

637G 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.

  • Specification Summary

  • Tractor Engine C18 ACERT
  • Scraper Engine C9 ACERT
  • Flywheel Power - Tractor/Scraper 211/373 kW (283/500 hp)
  • Net Power 345/373 kW (462/500 hp)
  • Product Brochure

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Product Details

Engine

Tractor Engine C18 ACERT
Scraper Engine C9 ACERT

Tractor Engine

Flywheel Power - Tractor/Scraper 211/373 kW (283/500 hp)
Net Power 345/373 kW (462/500 hp)
Gross Power - Gears 1-2 364 kg/mm
Gross Power - Gears 3-8 392 kg/mm
Net Power - Gears 1-2 345 kg/mm
Net Power - Gears 3-8 373 kg/mm
Bore 145 mm
Stroke 183 mm
Displacement 18.1 l

Scraper Engine

Net Power 198/211 kW (266/283 hp)
Gross Power - Gear 1 213 kg/mm
Gross Power - Gears 2-4 226 kg/mm
Net Power - Gear 1 198 kg/mm
Net Power - Gears 2-4 211 kg/mm
Bore 112 mm
Stroke 149 mm
Displacement 8.8 l

Scraper Bowl

Scraper Capacity - Heaped 26 m³
Rated Load 37285 null
Capacity - Struck 18.3 m³
Depth of Cut - Maximum 437 mm
Width - Cut - To Router Bits 3512 mm
Ground Clearance - Maximum 545 mm
Cutting Edge Thickness 28 mm
Hyd. Penetration Force - 637G 360 kN
Depth of Spread - Maximum 480 mm
Apron Opening 2007 mm
Apron Closure Force 170 kN

Transmission

Top Speed - Loaded 54.9 km/h
1 Forward 5.5 km/h
2 Forward 10 km/h
3 Forward 12.2 km/h
4 Forward 16.6 km/h
5 Forward 22.2 km/h
6 Forward 30.1 km/h
7 Forward 40.6 km/h
8 Forward 54.9 km/h
Reverse 9.9 km/h

Hydraulics

Bowl Cylinder Bore 184 mm
Bowl Cylinder Stroke 873 mm
Apron Cylinder Bore 210 mm
Apron Cylinder Stroke 727 mm
Ejector Cylinder Bore 210 mm
Ejector Cylinder Stroke 1880 mm
Steering Circuit 379 l/min
Scraper Circuit 344 l/min
Cushion Hitch Circuit 34.5 l/min
Secondary Steering Circuit 379 l/min
Relief Valve - Steering Circuit 13700 kPa
Relief Valve - Implement Circuit 14000 kPa
Compensator Settings - Cushion Hitch Circuit 16000 kPa

Steering

Width - 180° Turn 12.2 m
Width - 180° Turn - Right 12.2 m
Steering Angle - Right 90°
Steering Angle - Left 85°
Hydraulic Output 379 l/min

Service Refill Capacities - Tractor

Crankcase 45 l
Fuel Tank - 637G 1268 l
Transmission 110 l
Differential 148 l
Final Drive - Each 23 l
Cooling System 110 l
Hydraulic Reservoir 190 l
Wheel Coolant - Each 75 l
Windshield Washer 6 l

Service Refill Capacities - Scraper

Fuel Tank - 637G 1268 l
Crankcase 30 l
Transmission 72 l
Differential 12 l
Final Drive - Each 19 l
Wheel Coolant - Each 75 l
Cooling System 76 l

Dimensions

Width - Overall Machine 3938 mm
Width - Tractor 3481 mm
Width - Rear Tire Center Lines 2464 mm
Width - Inside of Bowl 3405 mm
Width - Outside Rear Tires 3636 mm
Width - Outside Bowl - Shipping Width 3914 mm
Height - Overall Shipping 4286 mm
Height - Top of Cab 3715 mm
Ground Clearance - Tractor 665 mm
Front of Tractor to Front Axle 3359 mm
Axle to Vertical Hitch Pin 548 mm
Height - Scraper Blade Maximum 545 mm
Wheel Base 8769 mm
Length - Overall Machine 14565 mm
Rear Axle - Rear of Machine 2437 mm
Bail Length - Maximum (Push-Pull) 4960 mm
Extended Push Block (Push-Pull) 2744 mm

Weights - Standard, Tandem

Total Shipping 51147 null
Tractor Shipping 30177 null
Scraper Shipping 20970 null
Total Operating - Empty 52047 null
Total Operating - Loaded 89332 null
Front Axle Weight - Loaded 43773 null
Rear Axle - Weight - Loaded 45559 null

Weights - Push-Pull

Total Shipping 52662 null
Tractor Shipping 31071 null
Scraper Shipping 21591 null
Total Operating - Empty 53562 null
Front Axle 31602 null
Rear Axle 21960 null
Total Operating - Loaded 90874 null
Front Axle - Loaded 44515 null
Rear Axle - Loaded 46332 null

Transmission - 637G

1 Forward 5.5 km/h
2 Forward 10 km/h
3 Forward 12.2 km/h
4 Forward 16.6 km/h
5 Forward 22.2 km/h
6 Forward 30.1 km/h
7 Forward 40.6 km/h
8 Forward 54.9 km/h
Reverse 9.9 km/h

Power Train – Engine

The C18 and C9 engines with ACERT™ Technology work at the point of combustion to optimize engine performance and minimize exhaust emissions. Matched with the torque converter and power shift transmission, they provide years of dependable and efficient service.

Power Train – Transmission

Electronic controls switch from converter drive to direct drive based on gear selection, maximizing efficiency and power application. Tractor and scraper engines are synchronized for smooth operation and longer service life.

Structures

Superior structural design delivers stateof- the-art ride, capacity, and material control while assuring the durability and reliability customers expect from Caterpillar.

Operator Station

Convenient control placement and a comfortable work environment are keys to high productivity. Features include electro-hydraulic controls, an available air seat suspension and advanced instrumentation.

Electronic Controls

The electronic controls respond to operator commands and input from on-board sensors to optimize machine performance. In addition, the electronic controls provide advanced diagnostic capabilities that result in better machine availability.

Scraper Bowl

Caterpillar® Scraper bowls are designed for excellent material flow and retention for fast cycle times and high productivity.

Push-Pull Arrangement

For maximum production capability, Caterpillar offers an optional push-pull arrangement for the 637G, which allows two push-pull scrapers to act as a selfloading machine.

Auger Arrangement

Provides self-loading capability with the same wide material appetite as an open bowl machine.

Serviceability

Grouped service points and easy access, the latest electronic monitoring systems and rugged Caterpillar components simplify maintenance and minimize downtime.

Customer Support

Caterpillar dealers have the parts and service capabilities to keep your wheel tractor-scrapers working.

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