Wheel Tractor Tractor Engine Cat® C15 with ACERT® technology Scraper Engine Cat C9 with ACERT technology

621G/627G Wheel Tractor Scrapers Responsible, productive earthmoving machines, built to last. Power Train – Engine Power Train – Transmission ✔ 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. pg. 4 ® ✔ 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....

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. pg. 8 Superior structural design delivers state-of-the-art ride, capacity, and material control while assuring the durability and reliability customers expect from Caterpillar. pg. 10 Serviceability ✔ The latest electronic monitoring systems, grouped service points, and rugged Caterpillar components simplify maintenance and minimize downtime. New two-piece access doors open easily and...

Power Train – Engine The new ACERT technology and proven components are electronically integrated to achieve new levels of performance and efficiency. 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. C15 Tractor Engine. The Cat C15 Electronically...

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. Diagnostic Capability. Electronic Technician (Cat ET) is used to display real-time pressures, temperatures, fuel settings and diagnostic messages as well as a historical...

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. 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....

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

Operator Station Redesigned for enhanced operator comfort and productivity. Multi-Adjustable Seat. 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. Seat Suspension. The seat suspension redefines the ride of scrapers. It features a high performance air shock absorber with its own air compressor. Standard Air Conditioning. Gives the operator a comfortable...

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...

Structures Superior structural design and construction optimize performance and reliability. Cushion Hitch. 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. Load cylinder Hitch castings Scraper gooseneck Nitrogen accumulators Orifice Oil from tractor hydraulic system Leveling valve Free floating pistons steel castings are used extensively to eliminate many welded joints and increase strength leveling valve automatically centers piston in cylinder for all...

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. 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, optional on 621G) helps retain material and keep it from spilling over onto...