627G Wheel Tractor Scraper

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.

Power Train



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 selfloading 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.

Dual Horsepower



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.

ACERT Technology



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 ulli injection timing and pressure lili engine cooling fan speed lili ether starting aid lili hydraulic pumpsliul

ADEM



The ADEM controls engine speed by adjusting the fuel duration, resulting in quicker starts in hot and cold weather, better fuel economy, better operator response, and automatic compensation for altitude and filter plugging.

AirtoAir Aftercooling ATAAC



Reduces air inlet temperature for enhanced combustion efficiency, reduced emissions levels, higher altitude capability, and more power.

Greater Reliability



The EUI system has fewer moving parts than mechanical unit injection and requires few adjustments. ECM communicates with the monitoring system 40EMS41 to warn the operator of potential problems, preventing major damage from occurring.

Maintenance



EUI engines have virtually no mechanically controlled parts to wear or adjust. These have been replaced by electronic controls, reducing maintenance costs and increasing machine availability.

Control Throttle Shifting CTS



Automatically synchronizes engine speed to transmission speed when shifting gears. CTS reduces power train stress and increases component life, as well as providing a smoother ride for the operator.

Automatic Ether Injection



ECM activates the ether injection system during engine cranking to help ensure reliable engine startup in extreme cold operating conditions.

Directional Shift Management



During directional shifts or shifts from neutral during high engine speed, engages speed clutches before directional clutches to reduce power train energy and increase power train life.

Automatic Altitude Compensation



The ECM automatically matches fuel delivery to barometric pressure. Auto deration protects against excessive combustion temperatures that could result in component damage.

Diagnostic Capability



Electronic Technician Cat ET is used to display realtime pressures, temperatures, fuel settings and diagnostic messages as well as a historical information such as engine overspeeds, overheating, low oil pressure and air filter restriction events.

Fuel Economy



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.

Air Filter Restriction



The ECM monitors air filter restriction and sends a warning message to the Electronic Monitoring System III to alert the operator if the restriction exceeds the allowable limit.

Reduced Exhaust Smoke



The ECM reads electronic sensors to determine the optimum fuelair 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.

Low Battery Elevated Idle



ECM automatically compensates for low alternator output at low idle by raising the rpm for brief intervals to keep the batteries fully charged.

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 ulli improved fuel efficiency lili more power lili decreased smoke and emissions lili faster hot and cold starts lili better high altitude performance lili less noise than mechanical injector enginesliul

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 onoff 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.

Scraper Radiator



The scraper has a standard unit core radiator, a onepiece unit design with 9 fins per inch. The larger fin spacing reduces clogging and eliminates the need for an attachment radiator.

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 ulli reducing the number of belts from five to two on the tractor, from four to two on the scraper lili eliminating the servicing for fan drive bearingsliul

Power Train Transmission



Integrated electronics allows the machine to monitor the power train which reduces stress as well as provide a better ride to the operator.

Transmission



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 38 operate in directdrive 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.

Planetary Design



Provides larger contact area between gears than countershaft transmissions for greater loadcarrying capacity.

Neutral Coast Inhibitor



Neutral coast inhibitor prevents the transmission from shifting into neutral if the operator selects neutral while moving, as well as maintaining the flow of the transmission fluid.

Transmission Hold



Allows the operator to maintain converter drive for increased rimpull, or hold the current gear for enhanced control.

Programmable Top Gear Selection



Allows the operator to manually set the top gear 3rd8th available to match conditions or the hauling speed of the fleet to specific jobsite needs.

Retarder



The hydraulic retarder acts as an internal brake on the driveline that minimizes the need to apply service brakes. By engaging the retarder 3 to 4 seconds before the machine traverses a downhill grade, the operator can reduce wear on the service brakes and enhance machine control.

Differential Control



Electronic differential lock on the tractor helps prevent the drive wheels from spinning in poor underfoot conditions. The operator engages the differential lock by choosing either the right or left foot control located on the floor of the cab.

Brake Performance



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.

Independent Systems



Expandingshoe type brakes are a camoperated design that is airapplied and spring released. The braking system uses independent front and rear circuits, with the secondary brakes automatically applied if the service air pressure drops to 55 psi 380 kPa.

Parking Brakes



The pushbutton operated parking brake features a springapplied, airreleased mechanism that operates the service brakes. Meet the ISO 3450 1998 standard.

Final Drives



Outboardmounted, planetary design final drives reduce torque loads on other power train components. Largecapacity, doublerow roller bearings and Caterpillar DuoCone seals deliver exceptional reliability in the toughest applications.

Electronic Controls



Instant response optimizes machine performance, and advanced diagnostic capabilities maximize machine availability.

Simplified System



The electrical system has been redesigned to utilize three electronic control modules ECM on the tractor instead of four. The rearpowered scraper now has two ECMs rather than three.

Air Filter Restrictor Indicator



Electronic control module ECM monitors air filter restriction and sends a warning message to the electronic monitoring system 40EMS41 to alert the operator if the restriction exceeds the allowable limit.

Automatic Ether Injection



The ECM activates the ether injection system during engine cranking to enhance cold weather starting.

Automatic Altitude Compensation



At high altitudes the system automatically derates fuel delivery as a function of barometric pressure sensed by the systems atmospheric pressure sensor.

Low Battery Elevated Idle



ECM automatically compensates for low alternator output at low idle by raising the rpm for brief intervals to keep the batteries fully charged.

Improved Serviceability



Combined monitoring systems, easy access diagnostics and more durable components make routine maintenance and servicing simple and fast.

Combined EMS Monitoring



The Electronic Monitoring System 40EMS III41 on the 627G is designed to monitor both the tractor and scraper status and access fault codes from one location instead of two. Both the tractor and powered scraper use the same controller for parts commonality and easier servicing.

Easy Access Diagnostics



Diagnostic codes are accessible through the EMS main display module, via the Electronic Technician Cat ET. This offers a head start on problem solving, with a radio call often providing the service technician with the knowledge of which tools, troubleshooting guides, and possibly even replacement parts to bring to the machine.

Greater Reliability



The Caterpillar EUI system has fewer moving parts than mechanical unit injection and requires few adjustments. ECM communicates with the monitoring system 40EMS41 to warn the operator when problems arise, preventing major damage from occurring.

Maintenance



EUI engines have virtually no mechanically controlled parts to wear or adjust. These have been replaced by electronic controls, reducing maintenance costs and increasing machine availability.

Fuel Economy



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 fuelair 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.

Operator Station



Redesigned for enhanced operator comfort and productivity.

MultiAdjustable Seat



The Cat Comfort Cloth Seat has an adjustable seat and armrests for maximum operator comfort. ulli Swivels and locks in four positions 0, 10, 20 and 30 providing the optimum operating position in the cut or on the haul. lili Foreaft and vertical height adjustment to accommodate various sized operators.liul

Seat Suspension



The seat suspension redefines the ride of scrapers. It features a high performance air shock absorber with its own air compressor.

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.

Visibility



Hood and front shroud width increased to accommodate the low emission engine, the airtoair aftercooler ATAAC, ether starting aid, and lights. Hood corners are sloped to maintain the same level of visibility as the ESeries.

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 handlehand 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 ulli Apron position lili Elevator direction, speed 4 Transmission Hold 5 Cushion Hitch 6 Trigger not shown here is on front of joystick lili Auger onoff lili PushPull bail updown lili Elevator onoff, resume liul Standard open bowl does not have a trigger

Instrument Display Panel



Features a quadgauge layout showing engine coolant temp, transmissiontorque 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.

Logical Control Placement



Frequently used switches and indicator lights are on the instrument panel, and less frequently used switches on the overhead console.

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 operatordefined top gear control. Relocating the gear control to the rear increases operator legroom.

Structures



Superior structural design and construction optimize performance and reliability.

Cushion Hitch



The electronically actuated cushion hitch incorporates a parallelogramtype linkage for exceptional strength with nitrogen accumulators to deliver a smooth ride for enhanced operator comfort. ulli controlled oil flow dampens rebound oscillation lili leveling valve automatically centers piston in cylinder for all loads lili steel castings are used extensively to eliminate many welded joints and increase strength lili doublekingbolt design withstands high external forces and simplifies installation and removalliul

Nitrogen Accumulators



Vertically mounted hydraulic cylinder transfers road shocks to nitrogen accumulators. Nitrogen accumulators absorb and dampen road shocks, thus preventing these loads from being transmitted to the operator.

Lockout Switch



An operatorselectable lockout switch, located on the joystick, locks the cushion hitch for improved control of the cutting edge during loading and dumping.

Scraper Bowl



Designed for optimum loading, material retention and ejection.

Redesigned Bowl



Excellent productivity with a 10 increase in bowl capacity, improved draft arm protection, and better load retention. Lowprofile 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.

Cutting Edges



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 Dealerto learn more about the best tools for your applications.

Tandem Engines



Two engines ensure the power to handle steep grades, and makes possible all wheel drive to handle soft, slippery underfoot conditions.

Dual Horsepower



Provides increased horsepower during the haul which results in faster cycle times.

Material Application



Well suited to handle a wide variety of material from clay to shot rock.

Optional PushPull Arrangement



Caterpillar offers a selfloading arrangement for the 627G.

PushPull Attachments



This optional arrangement concentrates the combined horsepower of two machines onto one cutting edge. The pushpull attachments allow two individual machines to act as a selfloading system, typically loading both machines in less than a minute.

Hydraulically Actuated Bail



The pushpull 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.

Increased Production



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.

Flexible Fleet



This system provides a more balanced, flexible fleet using fewer machines and less investment than comparable selfloading or pushloading systems.

Auger Arrangement



Excellent selfloading capability in a wide range of material.

Versatility



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 selfloading capability.

Material Conditioning



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.

Auger Benefits



The auger actions on the material produce several benefits ulli wide material appetite, ideal for landfills lili blending material creates a consistent, wellmixed load lili conditioned material reduces voids in the bowl for larger, more consistent payloads, and promotes compaction in the fill lili reduces dust and noise during loading lili precise metering of material in the fillliul

Dual Horsepower



Tractor engine automatically reverts to the higher setting when the auger motor is engaged.

Slip Limiter Switch



Prevents rear wheel slip during loading.

Hydraulic System



Single hydraulic system for entire machine with separate implement pumpsvalves simplifies maintenance and improves reliability.

Apron



revents material spillage and retains fine material far better than an elevating scraper.

Serviceability



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 righthand 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. ulli Spinon fluid filters for all but the main hydraulic filter lili Cab wiring harness redesigned and relocated for better serviceabilityliul

Electronic Monitoring System 40EMS III41



Monitors machine status and provides realtime information to the operator including warnings of problems identified by the Electronic Control Modules.

Event Log



The EMS event log records problems detected by the control system, including the time an event occurs, the number of occurrences for the event, an event identifier and problem code. The event log can be accessed using the Electronic Technician ET.

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 onepiece power block for better electrical integrity and serviceability. The disconnect switch, with a lockable cover, disables all power from the batteries and jumpstart functions.

ElectroHydraulic Implement Control



Simplifies serviceability by removing the cab pilot valve and associated lines, which also improves reliability and reduces noise. The high efficiency electrohydraulic 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.

Access Doors



The tractor has a standard twopiece 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 ulli Realtime pressures, temperatures, fuel settings and diagnostic messages lili Historical data such as engine overspeeds, overheating, low oil pressure and air filter restriction events lili More detailed information to the service technician who can access Cat ET via a laptop computerliul

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.

Customer Support



Cat dealer services help you operate longer with lower costs.

Product Support



You will find nearly all parts at our dealer parts counter. Cat dealers use a worldwide computer network to find instock 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.

Machine Selection



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.

Purchase



Look past initial price. Consider the financing options available as well as daytoday 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.

Operation



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.

Maintenance Services



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.

Replacement



Repair, rebuild or replace Your Cat dealer can help you evaluate the cost involved so you can make the right choice.


Scraper Bowl
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
.88 in.
Hyd. Penetration Force - 627G
48375 lb
Depth of Spread - max.
20.6 in
Apron Opening
70 in
Apron Closure Force
24075 lb

Transmission
Travel Speed Maximum
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

Tractor Engine
Net 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 Engine
Gross 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

Weights
Operating Weight
136905 lb

Weights - Standard, tandem
Total 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-Pull
Total 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

Dimensions
Width - 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

Steering
Width - 180° Turn
35.9 ft
Steering Angle - right
90°
Steering Angle - left
85°
Hydraulic Output
55 gal/min

Service Refill Capacities - Tractor
Crankcase
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

Hydraulics
Bowl Cylinder Bore
6 in
Bowl Cylinder Stoke
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

Service Refill Capacities - Scraper
Fuel 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