Milton CAT D7E User Manual
D7E
Track-Type Tractor
Engine Weights
Engine Model Cat
Global Emissions U.S. Tier 4 Interim/EU Stage IIIB Operating Weight – LGP S 28 525 kg 62,886 lb
Net Power – ISO 9249 175 kW 235 hp Shipping Weight – STD 21 955 kg 48,402 lb
Net Power – ISO 9249 (DIN) 238 hp Shipping Weight – LGP 24 335 kg 53,649 lb
Net Power – SAE J1349 175 kW 235 hp
Drive Train
Type Electric Drive
®
C9.3 ACERT™ Operating Weight – STD SU 26 055 kg 57,441 lb
D7E Features
Electric Drive Powertrain
The revolutionary electric drive system delivers
excellent dozing ef ciency and performance while
consuming considerably less fuel and fewer parts
to reduce lifetime owning and operating costs.
Operator Station
Center post cab design offers more space,
all-around visibility and reduced noise levels.
ACERT™ Engine Technology
Cat C9.3 engine with ACERT™ Technology powers
an electric generator that ef ciently converts
mechanical energy into AC electrical current.
Theengine is integrated with a Cat aftertreatment
solution to meet U.S. EPA Tier 4 Interim/
EUStageIIIB emissions standards.
Grade Control Ready
Deeply integrated wiring is installed at the factory
to make it simple to add a Cat AccuGrade™
system for improved accuracy and increased
productivity.
Serviceability
Tilt cab provides easy access to drive system
components, hydraulic pumps and lines.
Groupedservice points and large access
doorsfacilitate easy daily maintenance.
Sustainability
Designed to do more work while consuming
fewer resources.
Contents
Powertrain............................................................3
Engine ...................................................................4
Cooling System ....................................................4
Emissions Technology ........................................5
Operator Station ..................................................6
Integrated Technologies ....................................7
Work Tools ............................................................8
Serviceability and Customer Support ..............9
Undercarriage ...................................................10
Sustainability .....................................................10
D7E Track-Type Tractor Speci cations .........11
D7E Standard Equipment .................................15
D7E Optional Equipment...................................15
The Cat® D7E was designed to meet growing demand for
powerful yet highly maneuverable track-type tractors.
By adapting electric drive technology to the unique
requirements of dozer applications, Caterpillar has
developed an all-new class of tractor that delivers the
best possible balance of heavy-dozing and ne-grading
performance.
The innovative diesel-electric powertrain is also
designed to burn considerably less fuel and consume
fewer uids and parts for reduced owning and operating
costs. Improved productivity and efciency means getting
more work done while using fewer resources. The D7E
meets U.S. Tier 4 Interim/EU Stage IIIB emission standards.
Powertrain
First-of-its-kind Electric Drive delivers power and ef ciency
The electric generator, power inverter and propulsion module
in the electric drive system replace traditional mechanical
components such as a torque converter and transmission.
The Cat® C9.3 engine with ACERT™ Technology turns
a powerful electric generator that ef ciently converts
mechanical energy into AC electrical current. Electrical
current from the generator ows through specially armored
cables and military grade connectors to a solid-state power
inverter. Advanced electronics send AC current to the
propulsion module to control the motors and provides
DC current for the accessory systems.
The propulsion module delivers well-modulated torque
via axles to the nal drives. Consisting of state-of-the-art
AC electric motors – and connected to the D7E updated
differential steering system – the propulsion module has no
moving electrical contacts and few moving mechanical parts.
All electrical components are fully sealed to safely operate
in a wide range of dozing conditions. Liquid cooling ensures
that the electric drive components deliver peak performance
in extreme temperature conditions.
The D7E electric drive system is highly efcient at delivering
engine power to the ground. Innitely variable speed control,
means there are no gears to shift. Operators can concentrate
on the task and the job site, rather than on shifting gears and
managing engine speed. Training is simplied as well.
A proven differential steering system combines with
electric drive to make the D7E the only system that can
perform locked-track pivot turns for better maneuverability.
A dedicated D8-size steering pump delivers improved
performance.
Bene ts
• Fuel efciency: 10 – 30 percent less fuel burned per hour.
• Reduced owning and operating costs: Fewer moving
parts, longer drive train component life, reduced lifetime
service and maintenance.
• Resourceful: Designed to use less fuel and uids,
and fewer replacement parts.
• Increased efciency: Lower fuel usage per cubic yard
of material moved.
• Increased productivity: More material moved per hour.
• Versatility: Power, smooth operation and
maneuverability for a wide variety of applications.
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Engine
ACERT™ Technology
The D7E features a Cat C9.3 ACERT engine and a
CatClean Emissions Module aftertreatment to deliver
theperformance and efciency that customers demand,
whilemeeting U.S. EPA Tier 4 Interim/EU Stage IIIB
emissions standards.
The efcient drivetrain allows the engine to operate in a
tighter rpm range, 1,500 – 1,800 rpm, which helps extend
engine life and improve fuel economy. The increased
drivetrain efciency also allows the machine to achieve
greater performance at lower horsepower than previous
models, adding even more to the D7E overall bene ts.
Features
• Serviceability: Electric priming pump and easier engine
access make service easier.
• Leak Protection: Components are sealed, preventing
leaks and protecting uids from contamination.
Cooling System
Efcient and easy to service
The D7E cooling system uses a three-part radiator
built with rugged, highly efcient aluminum bar cores
for charged air, jacket water, and the separate circuit.
Although the jacket water and separate circuit coolant
operate at different temperatures, the radiator appears
and acts as one integrated unit. Airow is managed by
a hydraulic variable speed demand fan, reducing power
requirements and fuel consumption. A molded shroud
ensures efcient air ow through the radiator and the
fan utilizes lightweight, durable blades for high ef ciency
and quiet operation. A larger gap between ns reduces
plugging, and the single-plane design allows for easier
cleaning and service.
Emissions Technology
Reliable, integrated solutions
Cat NOx Reduction System
The Cat NOx Reduction System captures and cools a small quantity of exhaust gas, then routes it into
the combustion chamber where it drives down combustion temperatures and reduces NOxemissions.
Aftertreatment Technologies
To meet Tier 4 Interim/Stage IIIB emissions standards and beyond, Cat aftertreatment components
have been designed tomatch application needs. System components include a Diesel Oxidation Catalyst
(DOC), which uses a chemical process to convert regulated emissions in the exhaust system, and a
Diesel Particulate Filter (DPF) that traps particulate matter that iscarried into the exhaust stream.
The DOC, DPF and Cat Regeneration System are contained in a Caterpillar designed Clean Emissions
Module (CEM) that protects the components, minimizes the aftertreatment footprint and simpli es
maintenance. For high debris applications that require thermal shields on exhaust components, an
optional insulated CEM is available for the D7E.
Cat Regeneration System
The Cat Regeneration System is designed to work transparently, without any interaction needed from
the operator. Under most operating conditions, engine exhaust is hot enough to oxidize soot through
passive regeneration. Ifsupplemental regeneration is needed, the Cat Regeneration System elevates
exhaust gas temperatures to burn off soot in the Diesel Particulate Filter (DPF). This is a process that
happens automatically, but the operator can initiate the cycle when convenient or interrupt regeneration
as needed. A soot level monitor and regeneration indicator lights are integrated into the D7E dash
display.
Key Off Regeneration – Optional Key Off Regeneration allows the operator to initiate a regeneration
cycle after the key has been turned off. If a cycle takes place, the engine will complete regeneration,
followed by a cool down period priorto shutting down.
Delayed Engine Shutdown – Delayed Engine Shutdown feature is available to allow the machine to cool
immediately after a heavy work load or regeneration cycle.
Engine Idle Shutdown Timer – An optional Engine Idle Shutdown timer will sound a warning and shut
down the engine after the machine has been idling for a pre-set period of time.
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