Milton CAT D7E User Manual
D7E
Track-Type Tractor
Engine
Engine Model Cat
Net Power – SAE J1349 175 kW 235 hp
Drive Train
Type Electric Drive
®
C9.3 ACERT™
Weights
Operating Weight – STD SU 25 700 kg 56,669 lb
Operating Weight – LGP S 28 170 kg 62,115 lb
Shipping Weight – STD 21 600 kg 47,619 lb
Shipping Weight – LGP 23 980 kg 52,866 lb
D7E Features
Electric Drive Power Train
The revolutionary electric drive system delivers
excellent dozing efficiency 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,
improved all-around visibility and reduced
noise levels.
ACERT™ Engine Technology
Cat C9.3 engine with ACERT™ Technology
powers an electric generator that efficiently
converts mechanical energy into AC electrical
current. Meets U.S. EPA Tier 3, EU Stage IIIa
and Japan MLIT Step 3 emissions regulations.
Grade Control Ready
Factory installed wiring and mounting points make
it simple to add a Cat AccuGrade™ system for
improved accuracy and increased productivity.
Serviceability
New tilt cab provides easy access to drive
system components, hydraulic pumps and lines.
Grouped service points and large access doors
facilitate easy daily maintenance.
Sustainability
Designed to do more work while consuming
fewer resources – good for business and good
for the planet.
Contents
Power Train..........................................................3
Engine ...................................................................4
Cooling System....................................................4
Operator Station..................................................5
Undercarriage .....................................................6
Technology Solutions .........................................7
Work Tools............................................................8
Serviceability.......................................................9
Customer Support.............................................10
Sustainability .....................................................10
D7E Track-Type Tractor Specifications.........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 fine-grading
performance.
The innovative diesel-electric hybrid technology
of the D7E is also designed to burn considerably less
fuel and consume fewer fluids and parts for reduced
owning and operating costs. Improved productivity
and efficiency means getting more work done while
using fewer resources.
2
Power Train
First-of-its-kind Electric Drive delivers power and efficiency.
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 efciently 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.
Benefits
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.
3
Engine
ACERT™ Technology.
The D7E electric drive train is powered by a 235 hp Cat C9.3
engine with ACERT™ Technology. The engine utilizes a
proven common rail fuel system for improved efciency and
fuel economy. Featuring the latest in Cat emissions reduction
technologies, this engine meets U.S. EPA Tier 3, EU Stage IIIa
and Japan MLIT Step 3 emissions regulations.
The efcient drive train allows the engine to operate in a
tighter rpm range, 1500 – 1800 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 benets.
Features
Beltless design: Accessory systems are electrically
•
powered, so engine belts and alternators are not needed.
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
Efficient 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 berglass blades for high
efciency and quiet operation. A larger gap between ns
reduces plugging, and the single-plane design allows for
easier cleaning and service.
4
Operator Station
Unprecedented all-around visibility and comfort.
The all new D7E cab is designed to maximize operator efciency. From the operator’s seat, the single
center post aligns perfectly with the air intake, exhaust and lift cylinder, greatly enhancing forward
visibility. The angled door provides more side glass area, improving sightlines to the blade and all
around the job site. That helps operators work more condently and productively all shift long and
enhances job site safety.
The cab offers more interior space, as well as wider, swing out doors for easier cab access.
•
Ergonomic controls are fully adjustable and designed for low-effort comfort. Switches and controls
•
for various systems are located within easy reach of the operator.
Interior noise levels are reduced to a quiet 73 dB(A).
•
A single-unit heating, ventilation and air conditioning (HVAC) system is self contained and
•
powered by electrical current from the accessory power converter. It has no belts, needs no long
refrigerant lines, and maintains maximum cooling efciency even when the machine goes to idle.
An integrated display screen provides a range of machine status information, plus safety, service
•
and maintenance-related alerts. Built-in connections and mounts make for easy installation
of a grade control system display.
A speed recall feature allows operators to pre-set the desired forward and reverse travel speed,
•
and then resume that speed simply by pressing a button.
5
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