New Cat® D6T, D7E Track-Type Tractors Deliver Reduced Emissions, Higher Productivity and Lower Operating Costs
- 08 June 2012
- Company & Industry News
Joining the D8T, the new D6T and D7E models from Caterpillar build on the solid, proven designs of their predecessors with new features that increase fuel-efficiency and productivity while reducing operating costs. Both models feature Cat® engine and aftertreatment solutions to meet European Union (EU) stage IIIB emissions standards.
Integrated emissions control
The D6T and D7E use the Cat C9.3 ACERT™ engine with net horsepower ratings of 205 and 235 respectively. This engine utilizes the building blocks of ACERT Technology, including the Cat NOx Reduction System and Cat Clean Emissions Module (CEM), to meet Stage IIIB emissions standards.
ACERT Technology blends an innovative intake-air-management system, using optimized turbocharging, with electronically controlled fuel-injection that precisely shapes each combustion cycle through multiple-injection fuel delivery. This meticulous control of combustion parameters yields extremely clean combustion, steady power in all operating conditions and outstanding fuel efficiency.
The Cat NOx-Reduction System continually diverts and cools a small volume of the engine exhaust gases and then returns the cooled gases to the combustion chamber. This process reduces cylinder temperatures and, consequently, lowers NOx formation. The CEM, a compactly packaged aftertreatment unit, includes a Diesel Oxidation Catalyst (DOC) and a Diesel Particulate Filter (DPF) to remove particulate matter from the exhaust stream. Also included is the Cat Regeneration System – a process that removes soot from the Diesel Particulate Filter (DPF.)
Under most operating conditions, engine exhaust is hot enough to oxidize soot through a passive regeneration process. However, if conditions are such that supplemental regeneration is needed, the Cat Regeneration System elevates exhaust gas temperatures to oxidize soot within the DPF. The Cat Regeneration System is designed to work transparently, operating automatically without any interaction needed from the operator and regenerating when conditions are optimal.
The D6T and D7E each offer optional Key Off Regeneration, as well as a delayed engine shutdown timer and an engine idle shutdown timer. For high debris applications that require thermal shields on exhaust components, an optional insulated CEM is available as an option.
Machine family value
All three new tractor models are Grade Control Ready, with integrated harnesses incorporated into the machine during assembly. This allows for easy dealer installation of an AccuGrade™ machine control and guidance system when the machine is purchased or later as business requirements change.
Ground level service centers provide access to battery disconnect and engine shutdown switches as well as optional lighting switches without having to set foot on the machine. New lighting packages, steps and grab bars provide easier machine access/egress.
New cab interiors that are easier to clean, as well as streamlined dash displays and instrumentation, enhance operator efficiency and provide more commonality across the tractor line-up.
All three models also offer Cat Product Link*, which allows remote monitoring of equipment to improve overall fleet-management effectiveness. Product Link is integrated into machine systems. Events and diagnostic codes, as well as hours, fuel, idle time and other detailed information are transmitted to a secure web-based application, VisionLink. VisionLink includes powerful tools to convey information to users and dealers, including mapping, working and idle time, fuel level and more.
D6T design refinements
The Cat D6T is engineered for day-in/day-out demanding work. Standard electro-hydraulic controls improve precision and response and facilitate installation of the Cat AccuGrade™ machine control and guidance system, which saves fuel and time by helping operators attain specified grades in fewer passes.
The D6T hydraulically driven demand fan, operating only when necessary, works in concert with an all-new cooling package and advanced electronic engine controls to deliver fuel savings of as much as 6 percent, depending on the application. For even greater fuel economy—as much as 3 percent better—the D6T features an Eco Reverse Mode that reduces fuel consumption when the tractor reverses.
A new steering tiller, similar to that in the D7E, provides the convenience of a forward-reverse rocker switch and thumb wheel control for ground-speed.
D7E grows even more efficient
The Cat D7E remains the most innovative track-type-tractor available, featuring a diesel/electric drive system for unprecedented efficiency and productivity. D7E users are experiencing superior reliability and fuel efficiency on their own jobsites—often even better than the 10 to 30 percent fuel advantage over the D7RII as measured in production studies.
The new D7E features an Eco Reverse mode for even greater fuel efficiency, and a dual tilt blade option can improve dozing productivity.
By using less fuel and a smaller volume of drive-train lubricants, coupled with extended service intervals, the D7E can lower lifetime operating costs as much as 10 percent, compared with the D7R II. And as with all Cat Track-Type Tractors, the D7E major components are designed to be rebuilt, economically extending the productive life of the machine, significantly lowering lifetime owning and operating costs—and providing optimum return on the machine investment.