Caterpillar Equipment | Thompson CAT

Power Train

Electronically controlled Caterpillar engines with ACERT technology, modular radiator with 9 fins per inch, and an Electronic Control Module maximizes power to the cutting edge and exceptional haul road speed.

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.

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 utilizes advanced engine management software to monitor, control and protect the engine. ECM maintains an active electronic fault log that aids troubleshooting. Engine speed governing doesnt require any adjustment since it is fully electronic. In addition, ECM improves performance during cold starts as well as compensating for high altitude operations and air filter plugging. Input from sensors allow the ECM to monitor and control injection, timing, injection pressure, engine cooling fan speed, ether starting aid and hydraulic pumps to adjust to any operating condition.

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.

Air-to-Air 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 EMS 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 start-up in extreme cold operating conditions.

Directional Shift Management

Reduces driveline torque and transmission clutch energy when attempting directional shifts or shifts from neutral during high engine rpm. This helps prevent excessive transmission wear and increases drive train life. A pressure-sequencing valve assures that the speed clutches engage before the directional clutches, to absorb most of the torque load generated in direction changes.

Automatic Altitude Compensation

The ECM automatically adjusts fuel delivery according to barometric pressure as sensed by the systems atmospheric pressure sensor. No manual adjustment is required. Auto deration prevents excessive combustion temperatures that could result in component damage.

Diagnostic Capability

Electronic Technician (Cat ET) is used to display real-time pressures, temperatures, fuel settings and diagnostic messages as well as a historical information such as engine over-speeds, 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 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.

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:

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.

Scraper Radiator

The scraper has a standard unit core radiator, a one-piece 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:

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

Planetary powershift transmission delivers excellent load capability. Redesigned front and rear axles accommodate wider brake shoes and drums. The neutral coast inhibitor and programmable top gear reduce wear while increasing machine performance.

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 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. Gear selection choices are 1st, 2nd and Drive. The neutral lock thumb control must be pressed to move the shifter from neutral. To use the top gear button, with the engine running and the transmission shifter in �D�, the operator must hold the yellow button until the gear display on the instrument panel indicates the desired top gear. When the desired top gear appears on the display, the operator should release the yellow button to set the top gear. The top gear selected cannot exceed what is programmed into the Transmission/Chassis Control (TCC). The transmission hold switch is incorporated into the joystick controller and allows the operator to hold the machine in the current gear until the operation is completed (normally cut and/or fill).

Planetary Design

Provides larger contact area between gears than countershaft transmissions for greater load-carrying 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 tranmsission fluid. The transmission control will select the proper gear for the given engine rpm and ground speed.

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 (3rd-8th) available to match conditions or the hauling speed of the fleet to specific job-site 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. The retarder is located on the torque converter output shaft between the transmission and the torque converter housing. As oil enters the retarder housing it flows into the vanes of the rotor. The rotor, which turns at engine speed, throws oil against the stationary stator vanes on the retarder housing. As engine speed increases, the stators resistance to moving oil slows the rotation of the rotor thus slowing the machine. Optimal retarding action occurs when the engine is turning at rated rpm.

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. Lining Wear has improved by as much as 75 percent and drum wear has improved by 80 percent. In addition, this package can be retrofitted to prior F & G models.

Independent Systems

Expanding-shoe type brakes are a cam-operated design that is air-applied 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). Audible and visual action alert indicators inform the operator when the service air pressure drops to 75 psi (518 kPa).

Parking Brakes

The push-button operated parking brake features a spring-applied, air-released mechanism that operates the service brakes. Meet the ISO 3450: 1998 standard.

Final Drives

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.

Electronic Controls

Electronic controls improve machine response and provide advanced diagnostic capabilities that result in better machine availability. The Product Link option allows remote monitoring of location, machine system status, and alert indicators.

Simplified System

The electrical system was redesigned (effective with the s/n C prefixes) to utilize three electronic control modules (ECM) on the tractor instead of the four in the previous model. The rear powered scraper has two ECMs whereas the previous model had three. In addition the cab wiring harness has been redesigned and relocated for better serviceability. The EMS III system has been redesigned to monitor both the tractor and scraper with the ability to access fault codes from one location instead of two on the previous model. Parts serviceability has been improved with the use of the ABL2CS controller on both the tractor and powered scraper. While the same part number can service the tractor or the scraper, the appropriate engine management system software will have to be downloaded.

Air Filter Restrictor Indicator

Electronic control module (ECM) monitors air filter restriction and sends a warning message to the electronic monitoring system EMS 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 de-rates 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 EMS III 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 EMS 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 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.

Operator Station

Convenient control placement and a comfortable work environment are keys to high productivity. Features include Single Lever Implement Control, an air seat suspension and improved instrumentation.

Multi-Adjustable Seat

The Cat Comfort Cloth Seat has an adjustable seat and armrests for maximum operator comfort.

Swivels and locks in four positions (0�, 10�, 20� and 30�) providing the optimum operating position in the cut or on the haul.
Fore/aft and vertical height adjustment to accommodate various sized operators.

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 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)

* Standard open bowl does not have a trigger The joystick control system allows the operator to control the machine without removing their hand from the joystick. Both operator effort and stick travel have been reduced. These features, combined with the enhanced seating positions provided with the new Cat Contour Series Seat, help reduce operator fatigue and increase productivity. The joystick controller uses a combination of hydraulic and electronic controls, allowing the joystick functions to be tailored to the machine.

Instrument Display Panel

Features a quad-gauge layout showing engine coolant temp, transmission/torque converter oil temp, fuel level, and system air pressure. For 627G tandem engine machines, the tachometer is selectable to enable in-cab monitoring of front and rear engine speeds. Once the 627G tractor engine has been started, the operator can start the rear engine using a switch on the instrument panel instead of having to exit the cab and start the scraper engine from the outside. The electronic monitoring system EMS 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 constant pressure on the accelerator. An alternate-action on/off rocker switch enables the Throttle Lock feature, and is disabled by moving the rocker switch to the off position or by activating the service brakes or the retarder. A lamp indicates the feature is active.

Simplified Transmission Control

Simplifies gear selection and provides operator-defined top gear control. Forward gear selection choices are 1, 2, and D (Drive). The transmission control lever was moved to accommodate the more frequently used single-lever implement control. By relocating the gear control to the rear position on the right hand side of the operators station it increased legroom for the operator, resulting in a more spacious cab. The neutral lock thumb control must be pressed to move the shifter from neutral. To use the top gear button, with the engine running and the transmission shifter in �D�, the operator must hold the yellow button until the gear display on instrument panel indicates the desired top gear. When the desired top gear appears on the display, the operator then releases the yellow button and the top gear is set. The top gear selected cannot exceed what is programmed into the EPTC II transmission control unit.

Structures

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

Cushion Hitch

The electrically actuated cushion hitch incorporates a parallelogram-type linkage for exceptional strength and delivers a smooth ride for enhanced operator comfort. Nitrogen accumulators absorb and dampen road shocks so they are not transmitted to the operator. An operator selectable lockout switch located on the joystick locks the cushion hitch for improved cutting edge control during loading and dumping. Cushion Hitch Features:

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

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

Scraper Bowl

Caterpillar Scraper bowls deliver large loads with better retention, excellent material flow, fast cycle times and high productivity. Relocating the implement valve to the draft tube improves access and serviceability.

Redesigned Bowl

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.

Cutting Edges

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. 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. ARM scraper cutting edges and router bits will provide up to five times the wear life of conventional edges and router bits in high wear, low impact applications. Depending on applications, the serrated cutting edge may be more cost effective than the integrated tooth cutting edge. Drop Down position (stinger) provides good penetration and efficient flow of material into the bowl for production applications. a) Standard Cutting Edges - Center, End & Router Bits b) Serrated Cutting Edge - Center, Standard End Edges & Standard Router Bits c) ARM Cutting Edges - Center, End & Router Bits d) ARM Serrated Cutting Edge- Center, End, & Router Bits Level cutting edge is used for finish work or for very high impact conditions where stinger breakage has been a problem: Standard Cutting Edges - Center, End & Router Bits Teeth and Adapters improve penetration into compacted material. The bolt-on adapters are available for all scrapers.