627G Wheel Tractor Scraper
Overview of the 627G
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
- 246 kW (330 hp) / 178 kW (239 hp)
- Scraper Capacity: Heaped
- 22 yd3
- Top Speed (Loaded)
- 32 mph
- Tractor Engine
- Cat® C15 ACERT
627G Wheel Tractor Scraper
Tractor EngineFlywheel Power: Tractor/Scraper: 246 kW (330 hp) / 178 kW (239 hp)
Gross Power - Gears 1-2: 359 hp
Gross Power - Gears 3-8: 394 hp
Net Power - Gears 1-2: 330 hp
Net Power - Gears 3-8: 365 hp
Bore: 5.5 in
Stroke: 6.5 in
Displacement: 928 in3
Scraper BowlScraper Capacity: Heaped: 22 yd3
Rated Load: 52800 lb
Capacity Struck: 15.7 yd3
Depth of Cut - max.: 13.1 in
Width of Cut, to Router Bits: 119 in
Ground Clearance - max.: 20.6 in
Cutting Edge - thickness: 0.88 in.
Hyd. Penetration Force - 627G: 48375 lb
Depth of Spread - max.: 20.6 in
Apron Opening: 70 in
Apron Closure Force: 24075 lb
TransmissionTop Speed (Loaded): 32 mph
1 Forward: 3.1 mph
2 Forward: 4.7 mph
3 Forward: 6.8 mph
4 Forward: 9.2 mph
5 Forward: 12.4 mph
6 Forward: 16.7 mph
7 Forward: 22.6 mph
8 Forward: 32 mph
Reverse: 5.7 mph
EngineTractor Engine: Cat® C15 ACERT
Scraper Engine: Cat C9 ACERT
Scraper EngineGross Power - Gear 1: 258 hp
Gross Power - Gears 2-4: 286 hp
Net Power - Gear 1: 239 hp
Net Power - Gears 2-4: 266 hp
Bore: 4.41 in
Stroke: 5.87 in
Displacement: 538 in3
WeightsOperating Weight: 136905 lb
Weights - Standard, tandemTotal Shipping: 82113 lb
Tractor Shipping: 48447 lb
Scraper Shipping: 33666 lb
Total Operating - empty: 83441 lb
Front Axle: 49230 lb
Rear Axle: 34211 lb
Total Operating - loaded: 136241 lb
Front Axle Weight - loaded: 65396 lb
Rear Axle Weight - loaded: 70845 lb
Weights - Push-PullTotal Shipping: 85473 lb
Tractor Shipping: 52139 lb
Scraper Shipping: 33335 lb
Total Operating - empty: 86800 lb
Front Axle: 52080 lb
Rear Axle: 34720 lb
Total Operating - loaded: 139601 lb
Front Axle - loaded: 68405 lb
Rear Axle (Loaded): 71197 lb
DimensionsWidth - overall machine: 136.5 in
Width - tractor: 123.25 in
Width - rear tire center lines: 85.8 in
Width - inside of bowl: 116 in
Width - outside rear tires: 120 in
Height - overall shipping: 145.9 in
Height - top of cab: 134.75 in
Ground Clearance, Tractor: 21.75 in
Front of Tractor to Front Axle: 120.4 in
Rim radius: 17 in
Axle to Vertical Hitch Pin: 17 in
Height - scraper blade max.: 20.6 in
Wheelbase: 304 in
Length - overall machine: 508.5 in
Rear Axle to Rear of Machine: 84.3 in
Bail Length - max. (push-pull): 63.5 in
Extended Push Block (push-pull): 109.7 in
Service Refill Capacities â ScraperFuel Tank - 627G: 292 gal
Crankcase: 7 gal
Transmission: 15.6 gal
Differential: 4 gal
Final Drive (per side): 5 gal
Wheel Coolant (each): 12 gal
Cooling System: 20.3 gal
Weights â Machines achieving prior U.S. EPA Tier 3/EU Stage IIIA emission levelsN/A
Weights â Machines meeting U.S. EPA Tier 4 Interim/EU Stage IIIB emission standardsN/A
Tractor Engine â U.S. EPA Tier 4 Interim/EU Stage IIIBN/A
Scraper Engine â U.S. EPA Tier 4 Interim/EU Stage IIIBN/A
Service Refill Capacities â TractorCrankcase: 9.5 gal
Transmission: 19 gal
Differential: 38 gal
Final Drive (per side): 5 gal
Cooling System: 28 gal
Hydraulic Reservoir: 37 gal
Wheel Coolant (each): 12 gal
Windshield Washer: 1.5 gal
Scraper Engine â Prior U.S. EPA Tier 3/EU Stage IIIA configuration*N/A
HydraulicsBowl Cylinder Bore: 6 in
Bowl Cylinder Stroke: 32 in
Apron Cylinder Bore: 7.25 in
Apron Cylinder Stroke: 23.5 in
Ejector Cylinder Bore: 6.5 in
Ejector Cylinder Stroke: 61 in
Steering Circuit: 55 gal/min
Scraper Circuit: 65.5 gal/min
Cushion Hitch Circuit: 9.8 gal/min
Secondary Steering Circuit: 39.9 gal/min
Relief Valve - Steering Circuit: 2250 psi
Relief Valve - Implement Circuit: 2175 psi
Tractor Engine â Prior U.S. EPA Tier 3/EU Stage IIIA configuration*N/A
SteeringWidth - 180Â° Turn: 35.9 ft
Steering Angle â Right: 90°
Steering Angle â Left: 85°
Hydraulic Output: 55 gal/min
Transmission - 631GN/A
Transmission - 637GN/A
627G Wheel Tractor Scraper
The new ACERT technology and proven components are electronically integrated to achieve new levels of performance and efficiency.
C15 Tractor Engine
The Cat C15 Electronically Controlled Unit Injection (EUI) diesel engine powers the tractor. With dual horsepower capability, it provides high power and torque rise for excellent lugging in tough loading conditions. The C15 is designed for long hours of continuous operation with high displacement and low RPM ratings.
C9 Scraper Engine
The 627G is tandem powered by the Cat C9 scraper engine for peak performance and high productivity in self-loading applications. The C9 has a smaller physical envelope than the Cat 3306 it replaced, weighs less, and delivers more horsepower. In addition, all daily inspection points are located on the right hand side for easier maintenance.
Electronic engines deliver increased power when the auger is engaged or when the machine is in the roading gears, providing quicker acceleration on the haul road.
The C15 and the C9 electronic engines with ACERT technology meet US EPA Tier 3 and EU Stage III emission regulations. ACERT technology reduces emissions during the combustion process by using advanced technology in the air and fuel systems, in conjunction with integrated electronics. Caterpillar meets emission regulations at the combustion source rather than recycling exhaust gases.
Electronic Control Module (ECM)
The ECM responds to operator commands and engine sensor input to optimize engine and machine performance. This advanced engine management software controls and protects the engine at all times against cold starts, high altitude operations and air filter plugging by monitoring:
- injection timing and pressure
- engine cooling fan speed
- ether starting aid
- hydraulic pumps
Electronic Unit Injection (EUI)
Electronic injection provides complete control over injection timing, duration, rate and pressure under changing conditions over the entire engine operating range. The EUI controlled engine delivers:
- improved fuel efficiency
- more power
- decreased smoke and emissions
- faster hot and cold starts
- better high altitude performance
- less noise than mechanical injector engines
Engine Speed Lock
Allows the operator to maintain a given engine speed without using the accelerator pedal. This eliminates operator fatigue associated with holding the pedal down for extended periods of time. An on/off rocker switch enables the Speed Lock feature, and a lamp indicates the feature is active. Moving the rocker switch to the off position, or activating the service brakes or the retarder, disables the feature.
NGMR Engine Cooling System
The standard radiator for the tractor is the Next Generation Modular Radiator (NGMR) that features 9 fins per inch, whereas the previous model had a standard radiator of 33 fins per inch. The increased radiator fin spacing reduces clogging in severe applications.
Automatic Belt Tensioning
Both the tractor and scraper engines now have automatic belt tensioning rather than manual tensioning. Other improvements for both the tractor and scraper engines include:
- reducing the number of belts (from five to two on the tractor, from four to two on the scraper)
- eliminating the servicing for fan drive bearings
Power Train - Transmission
Integrated electronics allows the machine to monitor the power train which reduces stress as well as provides a better ride to the operator.
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. Reverse gear operates in converter drive. All scraper gears operate in converter drive for increased torque capability during the cut and fill.
Redesigned axles on both the tractor and scraper accommodate wider brake shoes and brake drums, improving brake performance as much as 20 percent and reducing brake and drum wear as much as 75 percent.
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.
Instant response optimizes machine performance, and advanced diagnostic capabilities maximize machine availability.
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.
Electronic controls yield a fuel savings by optimizing the timing setting for varying conditions. The ECM matches timing to the load on the engine, engine speed and temperature.
Product Link Ready
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 has the capability to automatically issue alerts when the machine is being operated beyond owner defined time and location limits.
Reduced Exhaust Smoke
The ECM reads electronic sensors to determine the optimum fuel/air ratio, then precisely controls fuel during cranking, starting and acceleration to reduce smoke. The ECM system is faster and more efficient than mechanically controlling the governor rack position.
Redesigned for enhanced operator comfort and productivity.
The Cat Comfort Cloth Seat has an adjustable seat and armrests for maximum operator comfort.
- Swivels and locks in four positions (0º, 10°, 20° and 30º) providing the optimum operating position in the cut or on the haul.
- Fore/aft and vertical height adjustment to accommodate various sized operators.
Revised Steering Column
Increases legroom a full 3.5 inches (89 mm), and reduces knee contact points.
Standard Air Conditioning
Gives the operator a comfortable workstation in any kind of weather. Relocated ventilation louvers improve airflow to the operator.
Storage And Amenities
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.
Hood and front shroud width increased to accommodate the low emission engine, the air-to-air aftercooler (ATAAC), ether starting aid, and lights. Hood corners are sloped to maintain the same level of visibility as the E-Series.
Single Lever Implement Control
Simple and easy to operate, the joystick enhances the productivity of operators of all skill levels. Requires less force to control the critical scraper functions and requires less lever travel. Grab handle/hand rest next to joystick controller so operator has a place to rest hand while on the haul and return roads. 1) Bowl (forward & back) 2) Ejector (side to side) 3) Thumb rocker switch
- Apron position
- Elevator direction, speed 4) Transmission Hold 5) Cushion Hitch 6) Trigger* (not shown here - is on front of joystick)
- Auger (on/off)
- Push-Pull (bail up/down)
- Elevator (on/off, resume)
Instrument Display Panel
Features a quad-gauge layout showing engine coolant temp, transmission/torque converter oil temp, fuel level, and system air pressure. The 627G tachometer can monitor either front or rear engine speeds. Once the 627G tractor engine has been started, the operator can start the rear engine from inside the cab. EMS III can display both front and rear engine information right in the cab.
Engine Speed Lock Controller
Enhances operation during long haul cycles by allowing the operator to maintain a desired engine speed without maintaining pressure on the accelerator.
Simplified Transmission Control
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.
Superior structural design and construction optimize performance and reliability.
The electronically actuated cushion hitch incorporates a parallelogram-type linkage for exceptional strength with nitrogen accumulators to deliver a smooth ride for enhanced operator comfort.
- controlled oil flow dampens rebound oscillation
- leveling valve automatically centers piston in cylinder for all loads
- steel castings are used extensively to eliminate many welded joints and increase strength
- double-kingbolt design withstands high external forces and simplifies installation and removal
Designed for optimum loading, material retention and ejection.
Excellent productivity with a 10% increase in bowl capacity, improved draft arm protection, and better load retention. Low-profile design of the bowl offers less resistance to incoming materials, while cellular construction adds strength and dent resistance to bowl sides and floor.
Bulldozer Ejection System
Combines constant spreading control while minimizing carryback material. A spill guard on the ejector (standard on 627G) helps retain material and keep it from spilling over onto the rear of the scraper.
May be adjusted according to job conditions. For most efficient loading, use the thinnest edge that provides satisfactory wear life and impact resistance.
Caterpillar Ground Engaging Tools (GET)
A wide variety of Ground Engaging Tool (GET) options, such as standard, serrated, and abrasion resistant material (ARM), are available to optimize scraper loading in various materials. Most are reversible to provide long life and reduced operating costs. Contact your Cat Dealer to learn more about the best tools for your applications.
Two engines ensure the power to handle steep grades, and makes possible all wheel drive to handle soft, slippery underfoot conditions.
Provides increased horsepower during the haul which results in faster cycle times.
Well suited to handle a wide variety of material from clay to shot rock.
Optional Push-Pull Arrangement
Caterpillar offers a self-loading arrangement for the 627G.
This optional arrangement concentrates the combined horsepower of two machines onto one cutting edge. The push-pull attachments allow two individual machines to act as a self-loading system, typically loading both machines in less than a minute.
Hydraulically Actuated Bail
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.
As the lead machine enters the cut, the trailing machine lowers the bail on the hook of the first machine. The second machine then pushes the first machine until it is loaded. When the second machine begins its loading cycle, the first machine pulls the second machine until it is loaded. After both machines are loaded, the second machine raises its bail and disengages from the first machine.
This system provides a more balanced, flexible fleet using fewer machines and less investment than comparable self-loading or push-loading systems.
Excellent self-loading capability in a wide range of material.
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, conditions it, and spreads it evenly in the bowl for true self-loading capability.
As the auger carries material from the cutting edge to the top of the load, it conditions the material into uniform size which helps eliminate voids in the bowl, thus ensuring consistent payloads. Conditioned material also requires less compactive force in the fill. In applications where dust is a concern, the auger has demonstrated that it significantly minimizes dust while loading when compared to the elevator loading system.
The auger actions on the material produce several benefits:
- wide material appetite, ideal for landfills
- blending material creates a consistent, well-mixed load
- conditioned material reduces voids in the bowl for larger, more consistent payloads, and promotes compaction in the fill
- reduces dust and noise during loading
- precise metering of material in the fill
Tractor engine automatically reverts to the higher setting when the auger motor is engaged.
Slip Limiter Switch
Prevents rear wheel slip during loading.
Single hydraulic system for entire machine with separate implement pumps/valves simplifies maintenance and improves reliability.
Count on Caterpillar for simplified service and the most productive uptime.
Grouped Service Points
Maintenance and service points for the engine are grouped on the right-hand side for easy access. They include the engine air cleaner, engine oil check and fill, fuel filters and priming, coolant level sight glass, window washer bottle, air conditioning dryer cartridge, ether starting aid canister, engine oil filter, fan drive lubrication, and sampling ports for the engine oil and coolant.
- Spin-on fluid filters for all but the main hydraulic filter
- Cab wiring harness redesigned and relocated for better serviceability
Electronic Monitoring System (EMS III)
Monitors machine status and provides real-time information to the operator including warnings of problems identified by the Electronic Control Modules.
Implement Valve Relocation
The implement valve has been relocated from the tractor to the top of scraper draft tube, reducing the number of hoses and tubes that cross over the gooseneck. The move reduces potential leak points, and improves service access.
One Piece Power Block
Jumpstart receptacle and disconnect switch are integrated into a one-piece power block for better electrical integrity and serviceability. The disconnect switch, with a lockable cover, disables all power from the batteries and jumpstart functions.
Electro-Hydraulic Implement Control
Simplifies serviceability by removing the cab pilot valve and associated lines, which also improves reliability and reduces noise. The high efficiency electro-hydraulic pilot oil filter provides cleaner oil for the pilot system.
Scraper Electrical Harness
A ribbon wiring harness replaced the cable harness for improved wear and durability. Its increased flexibility oscillates with the machine, and polyurethane boots offer better protection against the elements.
The tractor has a standard two-piece door on the right side for better access to service points. The hood, hinged on the front and supported by spring struts, easily opens towards the front of the machine, for better access to the top of the engine.
Electronic Technician (Cat ET)
The Caterpillar Electronic Technician (Cat ET) Service Tool is useful in troubleshooting existing problems or identifying potential problems by displaying:
- Real-time pressures, temperatures, fuel settings and diagnostic messages
- Historical data such as engine over-speeds, overheating, low oil pressure and air filter restriction events
- More detailed information to the service technician who can access Cat ET via a laptop computer
Easy Access Diagnostics
Diagnostic codes are accessible through the EMS main display module, via the Cat ET. Relaying this information to the service technician can let him know which tools, troubleshooting guides, and possibly even replacement parts to bring to the machine.
Cat dealer services help you operate longer with lower costs.
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.
Customer Support Agreements
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 the customers 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 SOSSM 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.
627G Wheel Tractor Scraper
- OPERATOR ENVIRONMENT
- POWER TRAIN
- OTHER STANDARD EQUIPMENT