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.
Flywheel Power - Tractor/Scraper | 373 kW (500 hp) / 211 kW (283 hp) |
Scraper Capacity - Heaped | — |
Top Speed - Loaded | — |
Tractor Engine | Cat C18 ACERT™ |
Scraper Engine | Cat C9 ACERT™ |
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 | — |
Gross Power - Gears 3-8 | — |
Net Power - Gears 1-2 | — |
Net Power - Gears 3-8 | — |
Bore | — |
Stroke | — |
Displacement | — |
Net Power | 198 kW (266 hp) / 211 kW (283 hp) |
Gross Power - Gear 1 | — |
Gross Power - Gears 2-4 | — |
Net Power - Gear 1 | — |
Net Power - Gears 2-4 | — |
Bore | — |
Stroke | — |
Displacement | — |
Scraper Capacity - Heaped | — |
Rated Load | — |
Capacity - Struck | — |
Depth of Cut - Maximum | — |
Width - Cut - To Router Bits | — |
Ground Clearance - Maximum | — |
Cutting Edge Thickness | — |
Hyd. Penetration Force - 637G | — |
Depth of Spread - Maximum | — |
Apron Opening | — |
Apron Closure Force | — |
Top Speed - Loaded | — |
1 Forward | — |
2 Forward | — |
3 Forward | — |
4 Forward | — |
5 Forward | — |
6 Forward | — |
7 Forward | — |
8 Forward | — |
Reverse | — |
Bowl Cylinder Bore | — |
Bowl Cylinder Stroke | — |
Apron Cylinder Bore | — |
Apron Cylinder Stroke | — |
Ejector Cylinder Bore | — |
Ejector Cylinder Stroke | — |
Steering Circuit | — |
Scraper Circuit | — |
Cushion Hitch Circuit | — |
Secondary Steering Circuit | — |
Relief Valve - Steering Circuit | — |
Relief Valve - Implement Circuit | — |
Compensator Settings - Cushion Hitch Circuit | — |
Width - 180° Turn | — |
Width - 180° Turn - Right | — |
Steering Angle - Right | 90° |
Steering Angle - Left | 85° |
Hydraulic Output | — |
Windshield Washer | — |
Fuel Tank | — |
Final Drive - Each | — |
Hydraulic Reservoir | — |
Cooling System | — |
Crankcase | — |
Differential | — |
Wheel Coolant - Each | — |
Transmission | — |
Differential | — |
Wheel Coolant - Each | — |
Cooling System | — |
Fuel Tank - 637G | — |
Final Drive - Each | — |
Crankcase | — |
Transmission | — |
Width - Overall Machine | — |
Width - Tractor | — |
Width - Rear Tire Center Lines | — |
Width - Inside of Bowl | — |
Width - Outside Rear Tires | — |
Width - Outside Bowl - Shipping Width | — |
Height - Overall Shipping | — |
Height - Top of Cab | — |
Ground Clearance - Tractor | — |
Front of Tractor to Front Axle | — |
Axle to Vertical Hitch Pin | — |
Height - Scraper Blade Maximum | — |
Wheel Base | — |
Length - Overall Machine | — |
Rear Axle - Rear of Machine | — |
Bail Length - Maximum (Push-Pull) | — |
Extended Push Block (Push-Pull) | — |
Front Axle | — |
Total Operating - Loaded | — |
Rear Axle - Weight - Loaded | — |
Scraper Shipping | — |
Total Shipping | — |
Tractor Shipping | — |
Rear Axle | — |
Front Axle Weight - Loaded | — |
Total Operating - Empty | — |
Total Shipping | — |
Tractor Shipping | — |
Scraper Shipping | — |
Total Operating - Empty | — |
Front Axle | — |
Rear Axle | — |
Total Operating - Loaded | — |
Front Axle - Loaded | — |
Rear Axle - Loaded | — |
6 Forward | — |
8 Forward | — |
Reverse | — |
5 Forward | — |
1 Forward | — |
2 Forward | — |
4 Forward | — |
3 Forward | — |
7 Forward | — |
The tractor for the 637G is powered by the C18 engine with ACERT Technology. The large displacement and high torque rise allow the scraper to cut through tough material. Matched to the high efficiency torque converter and electronically controlled power shift transmission, it will provide years of dependable service.
The 637G is tandem-powered, adding a Cat C9 engine with ACERT™ Technology for the scraper. The C9 gives the 637G exceptional power and fuel efficiency unmatched in the industry for consistently high performance in all applications.
C series engines have dual horsepower capability with the low power setting in torque converter drive and the high power setting in direct drive. If the auger is engaged while the machine is in torque converter drive, the machine automatically goes to the high power setting.
The MEUI system with variable shaped injection patterns provides for optimum combustion based on altitude and temperature. The Cat MEUI fuel system is a highly evolved fuel system with a proven record of reliability in the field. The system combines the technical advancement of an electronic control system with the simplicity of direct mechanically controlled unit fuel injection pressure. These features allow the C18 to completely control injection timing, duration and pressure.
The standard radiator for the tractor is the Next Generation Modular Radiator (NGMR), which features 9 fins per inch rather than 33 fins per inch found on previous models. The increased radiator fin spacing for both the tractor and the scraper reduces clogging in severe applications. Two-piece service doors improve access to clean out debris.
Oil change intervals in both the C18 and C9 engines can be extended to 500 hours with the use of S•O•SSM analysis.
Electronically controlled Caterpillar planetary powershift transmission with eight forward and one reverse speed. Tractor gears 1 & 2 operate in converter drive for increased torque capability during cut and fill operations. Gears 3-8 operate in direct-drive for drive train efficiency during the haul. All scraper gears operate in converter drive for increased torque capability during the cut and fill.
Outboard-mounted, planetary design final drives reduce torque loads on other power train components. Large-capacity, double-row roller bearings and Caterpillar Duo-Cone® seals deliver exceptional reliability in the toughest applications.
Expanding-shoe type brakes use a cam-operated design, which is air-applied and spring released. The secondary braking system uses independent front and rear circuits that are automatically applied if the service air pressure drops to 55 psi (380 kPa). Audible and visual action alert indicators inform the operator when the service air pressure drops to 75 psi (518 kPa).
Full hydraulic power steering provides automotive feel with positive, modulated flow control for constant steering response. An optional supplemental steering system is ground-driven and provides hydraulic power for steering if needed.
Increases legroom a full 3.5 in (89 mm), and reduces knee contact.
Standard air conditioning system with relocated louvers enhances airflow in the cab.
Convenient storage location includes space for a lunch box and first aid kit. The cab also has a cup holder as well as an ashtray.
The redesigned hood has sloped corners to maintain visibility while accommodating the low emissions engine. The redesigned hood and front shroud are wider to enclose the air-to-air aftercooler (ATAAC), ether starting aid, and lights. The exhaust is located at the back of the hood for good visibility to the right side.
Features a new quad-gauge layout showing engine coolant temp, transmission / torque converter oil temp, fuel level, and system air pressure. The 637G tachometer can monitor either front or rear engine speeds. Once the 637G tractor engine has been started, the operator can start the rear engine from inside the cab using a switch on the instrument panel. EMS III can display both front and rear engine information right in the cab.
Enhances operation during long haul cycles by allowing the operator to maintain a desired engine speed without maintaining pressure on the throttle.
Simplifies gear selection (1st, 2nd, Drive and Reverse) and allows operator-defined top gear control. Relocating the gear control to the rear increases operator legroom.
The grab handle/hand rest next to joystick controller gives operators a place to rest their hand while on the haul and return roads.
The electrical system has been redesigned to utilize three electronic control modules (ECM) on the tractor instead of four. The rear-powered scraper now has two ECMs rather than three.
Combined monitoring systems, easy access diagnostics and more durable components make routine maintenance and servicing simple and fast.
Product Link is a wireless system that allows the customer to track machine data such as location, service meter hours as well as machine health information. The system can automatically issue alerts when the machine is operated beyond owner-defined time and location limits. Product Link is available as a factory attachment or it may be installed in the field, in that there is a mounting location for the module as well as an antenna on the machine. A wiring breakout is standard, without having to splice into existing wires.
Electronic controls yield a fuel savings by optimizing the timing setting for varying conditions. The ADEM A4 controller matches timing to the load on the engine, engine rpm and temperature.
The ADEM A4 controller reads electronic sensors to determine the optimum fuel/air ratio. Fuel is precisely controlled during cranking, starting and acceleration to reduce smoke. The Engine Electronics are faster and more efficient than mechanically controlling the governor rack position.
Cat bulldozer ejection system offers constant spreading control with minimal material carry back. A spill guard helps retain material and keep it from spilling over onto the rear of the scraper (standard on tandem engine scrapers, optional on single engine open bowl scrapers).
May be adjusted according to job conditions. The stinger (drop down) position provides good penetration and efficient flow of material into the bowl whereas the level cutting edge is used for finish work or very high impact conditions.
Two engines ensure the power to handle steep grades, and makes possible all wheel drive to handle soft, slippery underfoot conditions.
On the tandem engine scraper, the rear engine has dual horsepower capability that results in better performance on the haul roads.
Well suited to handle a wide variety of material from clay to shot rock.
This optional arrangement concentrates the combined horsepower of two machines onto one cutting edge. The push-pull attachment allows two individual machines to act as a self-loading system, typically loading both machines in less than a minute.
This system provides a more balanced, flexible fleet using fewer machines and less investment than comparable self-loading or push-loading systems.
The push-pull arrangement uses a hydraulically actuated bail and cushioned plate bolted to the front of the tractor, and a hook that is attached to the rear of the scraper. There is an actuator indicator light on the dash that will turn on when the trigger is engaged to actuate the push-pull bail or auger.
The auger has a wide material appetite ranging from rock to free flowing material such as sand.
The auger lifts material off of the cutting edge and carries it to the top of the load for true self-loading capability. Material is distributed evenly throughout the bowl, resulting in consistent loads.
Tractor engine automatically reverts to the higher setting when the auger motor is engaged.
Prevents rear wheel spin during loading.
Single hydraulic system for entire machine with separate implement pumps/valves simplifies maintenance and improves reliability.
The implement valve has been relocated from the tractor to the top of scraper draft tube. The result is fewer hoses and tubes that cross over the gooseneck, and fewer potential leak points. The relocation also improved access to the implement valve for better serviceability.
The 637G features full electro-hydraulic controls, which simplify serviceability and reduce noise by replacing the cab pilot valves with a single-lever joystick control. The high-efficiency electro-hydraulic pilot oil filter provides cleaner oil for the pilot system.
The hydraulic system features closed-loop, full-flow hydraulic circuits powered by gear-type and piston-type pumps.
Prevents material spillage and retains fine material far better than an elevating scraper.
You will find nearly all parts at our dealer parts counter. Cat dealers use a world-wide computer network to find in-stock parts to minimize machine down time. Save money with genuine Cat Reman parts. You receive the same warranty and reliability as new products at substantial cost savings.
Make detailed comparisons of the machines under consideration before purchase. Cat dealers can estimate component life, preventive maintenance cost, and the true cost of lost production.
Look past initial price. Consider the financing options available as well as day-to-day operating costs. Look at dealer services that can be included in the cost of the machine to yield lower equipment owning and operating costs over the long run.
Cat dealers offer a variety of product support agreements, and work with customers to develop a plan that best meets specific needs. These plans can cover the entire machine, including attachments, to help protect your investment.
Improving operating techniques can boost your profits. Your Cat dealer has videotapes, literature and other ideas to help you increase productivity, and Caterpillar offers certified operator training classes to help maximize the return on your machine investment.
Talk to your dealer about the range of available maintenance services. Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as S•O•SSM Analysis and Coolant Sampling and Technical Analysis help avoid unscheduled repairs.
Repair, rebuild or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice.
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