Open Bowl Scrapers Caterpillar 657G

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

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  • Proven Cat engines provide the power and torque rise for excellent lugging in tough loading conditions.
  • Variable injection timing and duration improve fuel efficiency and cold starting, decrease smoke and emissions.
  • Throttle back-up provides the operator with a preset engine speed control in the event of a throttle input failure.
  • Throttle lock allows the operator the capability of locking both engines at any operating level.
  • Directional shift management prevents the operator from shifting out of neutral when engine rpm is above a preset level.
  • Controlled throttle shifting increases drive train life by reducing the fuel injection rate just prior to shifting.
  • The aftercooler lowers intake charge air temperature to increase power and reduce thermal stresses that can cause premature wear of pistons, rings, and liners.
  • Engine oil cooler maintains optimum oil temperature for proper cooling and longer lubricant life.
  • Laminated thermal-shield improves tractor protection by reducing the temperature of exposed engine surfaces, cools engine and operating compartments, extends hose and wiring life.
  • Eight-speed power shift transmission provides automatic, on-the-go shifting for simple, reliable operation.
  • Top gear control helps prevent shifting above a programmed gear to better regulate haul road speeds.
  • The hydraulic retarder extends brake life when working on severe, downhill slopes.
  • Scraper driveline guard protects the output case, differential and ejector cylinder to help minimize driveline maintenance costs.


  • Wide brake shoes and brake drums improve brake performance and reduce brake and drum wear.
  • Separate front and rear circuits. Secondary brakes engage automatically if service pressure drops.
  • Parking Brake features a spring-applied, air-released mechanism that operates the service brakes.
  • Differential Lock improves traction in slippery conditions.


  • Standard rubber-mounted cab reduces noise and vibration for comfortable, shift-long operation.
  • Hydraulic servo-steering system provides low-effort automotive feel and excellent maneuverability.
  • Tilt steering column adjusts to five different positions for operator comfort and control.
  • A suspension seat delivers a comfortable ride.
  • The Electronic Monitoring System checks important machine systems and provides a three-level warning.
  • Air conditioning to keep the operator comfortable.
  • The electronically controlled cushion hitch design dampens shocks to provide a smoother ride, and locks down for positive control of the cutting edge during loading and dumping.


  • Service points for the engine are grouped on the right side for easy access. Service platforms and numerous handholds improve access and safety. Folded core radiator allows individual cores to be replaced as modules, reducing service time and expense.
  • Diagnostic connector, with the aid of a service tool, allows quick analysis of the starting and charging circuits.
  • Electronic ground level shutoff enables the operator to stop the engine from the ground with the flip of a switch.
  • Centralized lubrication blocks for the hitch and steering reduce lube time.


  • Tandem engine machines improve cycle times on grades and in slippery underfoot conditions. Also improves the machine's loading characteristics in tough materials like clay.
  • Transmission Torque Converter - Increases rim pull and shortens load times, and eliminates engine stall to efficiently deliver power to the ground and move more dirt.
  • An auger mechanism in the bowl improves self-loading capabilities by lifting material off of the cutting edge and carrying it to the top of the load.

Specificatii tehnice


Tractor Engine Cat C18
Scraper Engine Cat C15
Tractor Engine
Flywheel Power - Tractor/Scraper 447 kW (600 hp) / 337 kW (451 hp)
Net Power 421/447 kW 564/600 hp
Gross Power - Gears 1-2 445 kW
Gross Power - Gears 3-8 471 kW
Net Power - Gears 1-2 421 kW
Net Power - Gears 3-8 447 kW
Bore 145 mm
Stroke 183 mm
Displacement 18.1 l
Scraper Engine
Net Power 306/337 kW 410/451 hp
Gross Power - Gears 1-2 326 kW
Gross Power - Gears 3-8 356 kW
Net Power - Gears 1-2 306 kW
Net Power - Gears 3-8 337 kW
Bore 140 mm
Stroke 165 mm
Displacement 15.2 l
Scraper Bowl
Scraper Capacity - Heaped 33.6 m³
Rated Load 47174 kg
Capacity - Struck 24.5 m³
Depth of Cut - Maximum 440 mm
Width - Cut - To Router Bits 3846 mm
Ground Clearance - Maximum 580 mm
Cutting Edge Thickness 45 mm
Hyd. Penetration Force - 657G 542 kN
Depth of Spread - Maximum 660 mm
Apron Opening 2337 mm
Apron Closure Force 176 kN
Top Speed - Loaded 55.7 km/h
1 Forward 5.6 km/h
2 Forward 10.2 km/h
3 Forward 12.5 km/h
4 Forward 17 km/h
5 Forward 22.7 km/h
6 Forward 30.6 km/h
7 Forward 41.2 km/h
8 Forward 55.7 km/h
Reverse 9.8 km/h
Bowl Cylinder Bore 235 mm
Bowl Cylinder Stroke 950 mm
Apron Cylinder Bore 235 mm
Apron Cylinder Stroke 760 mm
Ejector Cylinder Bore 260 mm
Ejector Cylinder Stroke 1946 mm
Steering Circuit 378 l/min
Scraper Circuit 579 l/min
Cushion Hitch Circuit 48 l/min
Secondary Steering Circuit 243 l/min
Relief Valve - Steering Circuit 13500 kPa
Relief Valve - Implement Circuit 13780 kPa
Compensator Settings - Cushion Hitch Circuit 20700 kPa
Width - 180° Turn - Right 13.6 m
Width - 180° Turn - Left 14.5 m
Steering Angle - Right 90°
Steering Angle - Left 85°
Service Refill Capacities - Tractor
Crankcase 64 l
Transmission 136 l
Differential 136 l
Final Drive - Each 23 l
Cooling System 125 l
Hydraulic Reservoir 303 l
Wheel Coolant - Each 130 l
Windshield Washer 2 l
Service Refill Capacities - Scraper
Fuel Tank - 657G 1597 l
Crankcase 38 l
Transmission 121 l
Differential 168 l
Final Drive - Each 30 l
Wheel Coolant - Each 130 l
Cooling System 89 l
Width - Overall Machine 4344 mm
Width - Tractor 3601 mm
Width - Rear Tire Center Lines 2813 mm
Width - Inside of Bowl 3683 mm
Width - Outside Bowl - Shipping Width 3914 mm
Height - Overall Shipping 4710 mm
Height - Top of Cab 3712 mm
Ground Clearance - Tractor 645 mm
Front of Tractor to Front Axle 3770 mm
Axle to Vertical Hitch Pin 608 mm
Height - Scraper Blade Maximum 680 mm
Wheel Base 9956 mm
Length - Overall Machine 16164 mm
Rear Axle - Rear of Machine 2438 mm
Bail Length - Maximum (Push-Pull) 1836 mm
Weights - Standard, Tandem
Total Shipping 67113 kg
Tractor Shipping 39788 kg
Scraper Shipping 27325 kg
Total Operating - Empty 68384 kg
Front Axle 39881 kg
Rear Axle 28503 kg
Total Operating - Loaded 115558 kg
Front Axle Weight - Loaded 58172 kg
Rear Axle - Weight - Loaded 57386 kg
Weights - Push-Pull
Total Shipping 72804 kg
Tractor Shipping 42472 kg
Scraper Shipping 29061 kg
Total Operating - Empty 72804 kg
Front Axle 42566 kg
Rear Axle 30238 kg
Total Operating - Loaded 119978 kg
Front Axle - Loaded 60856 kg
Rear Axle - Loaded 59121 kg
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