Milton CAT D8T User Manual

Engine

Engine Model Cat®C15 ACERT
Gross Power 259 kW 347 hp
Flywheel Power 231 kW 310 hp

Weights

Operating Weight 38 488 kg 84,850 lb
Shipping Weight 29 553 kg 65,152 lb

• Operating Weight: Includes hydraulic controls, blade tilt
cylinder, coolant, lubricants, 100% fuel, ROPS, FOPS cab,
SU-Blade, Single-Shank Ripper, 560 mm (22 in) MS shoes,
and operator.

• Shipping Weight: Includes coolant, lubricants, 20% fuel,
ROPS, FOPS cab, and 560 mm (22 in) MS shoes.

D8T

Track-Type Tractor

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D8T Track-Type Tractor

Strength from the past. Power for the future.™ The D8T combines power and efficiency with
advanced technology for outstanding production at a lower cost-per-yard.

Engineered for demanding work.

The durable construction of the D8T is
well suited for tough working conditions.
Combined with the C15 engine for superior
performance, fuel economy and meeting
emission targets with the help of ACERT
Technology, it keeps material moving with
the reliability and low operating costs you
expect from Cat tractors.

Work Tools

Various bulldozer blades, rippers,
winches, and other options allow you
to adapt the D8T to match your specific
application, making you more productive.

pg. 14

Integrated Electronic Solutions

Caterpillar offers technology options
such as Product Link and AccuGrade

®

Grade Control System that provide
greater accuracy, higher productivity,
lower operating costs and more
profitability. pg. 12

Implement and Steering Controls

Electro-hydraulic implement controls
allow low operator effort for dozing and
ripping. Steering and gear selection in a
one-hand control system enhances
operator comfort. pg. 8

✔

Operator Station

Designed for operator comfort,
convenience, and productivity.
Machine control and vital information
is provided at the operator’s fingertips.
A full day of work is no problem in this
efficient work place. pg. 6

✔

C15 Engine with ACERT®Technology

ACERT Technology works at the point
of combustion to optimize engine
performance and provide low exhaust
emissions. Matched with the torque
divider and power shift transmission,
it provides years of dependable and
efficient service. pg. 4

✔

✔ New Feature

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Serviceability and Customer Support

Combining easy to access, modular
components with your Caterpillar

®

Dealer’s advanced rebuild and repair
capabilities ensures rapid component
replacement and minimum downtime.

pg. 15

✔

Structure

Mainframe is heavy, strong and durable.
Full box sections, steel castings and
continuous rolled rails provide durable
support to the suspended undercarriage,
elevated final drives and other integral
frame components. pg. 11

✔

Undercarriage

The proven elevated sprocket
undercarriage isolates the drive train
components from ground-induced
impacts. The suspended undercarriage
puts more track on the ground for
higher traction and less track slip.
It absorbs shocks for a smoother ride
and longer machine life. pg. 10

Drive Train

The electronically controlled power
shift transmission, efficient differential
steering and durable planetary final
drives deliver outstanding power
transfer and long life to ensure
maximum productivity. pg. 9

C15. Performing at full-rated net power
of 231 kW (310 hp) at 1,850 rpm, the
large displacement and high torque rise
allow the D8T to doze through tough
material. Matched to the high-efficiency
torque divider and electronically
controlled power shift transmission,
it will provide years of dependable service.

Constant Net Horsepower. Constant
net horsepower allows the operator to
maintain high standards of performance
and response, even when parasitic loads,
such as the on-demand cooling fan,
are applied. The engine automatically
adjusts to maintain power output and
conversely lowers output when demands
are low. This converts to a fuel savings
in cooler climates.

C15 Block. The one-piece, grey iron
block features generous ribbing for
stiffness and heavy bearing bulkheads
for rigidity and strength. Incorporation
of straight o-ring connection points
reduces the loss of engine oil and fluids.

ADEM™ A4 Engine Controller.

The ADEM A4 electronic control
module manages fuel delivery to get
the best performance per gallon (liter)
of fuel used. It provides flexible fuel
mapping, allowing the engine to respond
quickly to varying application needs.
It tracks engine and machine conditions
while keeping the engine operating at
peak efficiency.

Fuel Delivery. Multiple injection
fuel delivery involves a high degree
of precision. Precisely shaping the
combustion cycle lowers combustion
chamber temperatures generating
fewer emissions and optimizing fuel
combustion; translating into more work
output for your fuel cost.

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A combination of innovations working at the point of combustion, ACERT Technology
optimizes engine performance while meeting EPA Tier 3 and EU Stage IIIa engine exhaust
emission regulations for off-road applications.

C15 Engine with ACERT®Technology

MEUI Fuel System. A highly evolved

fuel system with a proven record of
reliability in the field. MEUI combines
the technical advancement of an electronic
control system with the simplicity of
direct mechanically controlled unit fuel
injection. The MEUI system excels in
its ability to control injection pressure
over the entire engine operating speed
range. These features allow the C15 to
have complete control over injection
timing, duration, and pressure.

ATAAC and Airflow. Air-to-air
aftercooling keeps air intake temperatures
down and, in concert with the tight
tolerance combustion chamber
components, maximizes fuel efficiency
and minimizes emissions. Significant
improvements in air flow are generated
by a water-cooled turbocharger, unique
cross-flow head and single overhead cam.

Turbocharging and Air-to-Air
Aftercooling. Provides high horsepower

with faster response time while keeping
intake temperatures low for long hours
of continuous operation.

Service. Easier maintenance and repair
through monitoring key functions and
logging critical indicators. Electronic
diagnostic access is possible with a
single tool, the Cat Electronic Technician.

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Designed for operator comfort, convenience, and productivity, the state-of-the-art cab sets
a new standard.

Operator Station

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1) Steering Control. Dual-twist tiller

control with standard differential steering
controls direction and degree of turns,
forward-reverse shifting, and gear
selection in a single control handle—
enhancing operator comfort.

2) Cat Comfort Series Seat.

Fully adjustable and designed for
comfort and support. Thick seat and
back cushions provide support for the
lower back and thighs, while allowing
unrestricted arm and leg movement.
Wide retractable seat belt provides
positive and comfortable restraint.

3) Adjustable Armrests. Standard
adjustable armrests provide additional
comfort for the operator.

4) Electronic Ripper Control. A rigidly
mounted handgrip, with low effort
thumb and finger controls, provides
firm support and positive control of
the ripper when operating in tough
conditions. Programmable features,
such as Auto Lift, Shank-Out and
Auto Stow, increase efficiency for
the operator.

5) Electronic, Programmable Dozer
Control. Features such as blade response,

blade float, auto blade pitch, and spread
rate can be set and adjusted using the
Advisor panel. Auto Blade Assist and
AutoCarry options make the tractor even
more efficient in specific applications.

6) Cat Monitoring Display System.

The combination dash mounted
instrument cluster and the Advisor
Monitoring System provide key machine
operating information and give the
operator and service technician insight
into the machine’s operation and
maintenance needs.

In-Dash Instrument Cluster.

The instrument panel, with easy to
read gauges and warning lamps, keeps
the operator aware of any potential
problems. All gauges and readouts
are easily visible in direct sunlight.

Advisor Monitoring System (AMS).

On-board diagnostic abilities minimize
downtime and maximize machine
performance.

7) Wide Panoramic View. The operator
station offers an exceptional viewing
area. A large view hole in the single­shank ripper frame provides a view of
the ripper tip. The tapered hood, notched
fuel tank and narrow single-shank ripper
carriage give the operator a clear line
of sight to the front and rear work areas.
The large single-pane door windows
provide an excellent view to the sides
and blade.

8) Heating and Air Conditioning.

Conveniently located air circulation
vents evenly distribute airflow within
the cab. Controls are easily accessible
from the operator seat.

Fuse Panel and Diagnostic Access.

The new compartment features a single
location fuse panel that includes a
diagnostic port for the Cat ET to connect
for rapid machine diagnostics.

Comfortable Operation. Standard
isolation-mounted cab reduces noise
and vibration. The cab is pre-wired
for a 12-volt or 24-volt radio, equipped
with two speakers, an antenna and a
radio mount recessed in the headliner.

7

Dozer Control Lever. A low-effort,
electronic dozer control handle gives the
operator control of all dozer functions
with one hand. Fore/aft movement of
the lever lowers and raises the blade.
Left/right movement directionally tilts
the blade. When equipped with the
optional Dual Tilt feature, the thumb
lever at the top of the handle controls
blade pitch fore and aft. The trigger
switch toggles between single and
dual tilt.

The left and right side thumb buttons
provide control over the semi-automated
blade pitch functions, that the Dual Tilt
attachment provides. Blade pitch for
load, carry and spread segments can
be preset on Advisor and controlled by
the buttons. The left side button cycles
between the pitch settings for each
segment of the push cycle. The right
side button cancels out of the pitch
functions without loosing the preset
pitch angles. This Auto Blade Assist
(ABA) feature is turned on and off
using a switch on the right side console.

The two buttons also provide control
over the AccuGrade™ blade control
attachment when the machine is
so equipped. The buttons turn on
AccuGrade, provide manual increment
and decrement control, and turn off
AccuGrade.

Auto Pitch. Presetting blade pitch angles
for optimal performance during the
dozing cycle: one setting each for load,
carry, spread and return. Auto Pitch is
activated on the Advisor keypad; the
operator can select the dozing segment
by pushing the yellow button on the left
side of the dozer handle.

AccuGrade

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Ready Option (ARO).

The AccuGrade Ready Option (ARO)
provides a factory installed on-board
platform for the AccuGrade GPS
installation. All of the changes required
to the electrical system, hydraulic
system, blade, and cab are incorporated
into the ARO. Mounting brackets added
on the blade allow easy installation of
the masts. Console mounting in the cab
secure the in-cab display. Plug-in points
inside the cab and on the front of the
machine make it easy to install
electronic components.

Computer Aided Earthmoving System
(CAES) (optional). This on-board

electronic site plan directs machine
operators, in real-time, where to cut and
fill. A graphical map of the design plan
and a view of the machine’s horizontal
and vertical position simplify operation
and enhance production. This advanced
information tool combines GPS
technology (centimeter-level) and in-cab
computing capabilities for precise grade
and slope control. It has proven to
provide measurable impact on work
quality and overall productivity.

Ripper Control Lever. A rigidly mounted
handgrip provides firm support for
the operator even when ripping in the
roughest terrain. The low effort thumb
lever controls raising and lowering.
The finger lever controls shank-in and
shank-out positioning. The thumb button
automatically raises the ripper.

Tiller Control System. A single lever,
dual-control tiller controls machine
speed, direction, and steering. The tiller
allows the operator to work precisely
in close areas, around structures, grade
stakes, other machines and during fine
grading work.

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Implement and Steering Controls

Low effort control functions significantly reduce operator fatigue for increased performance.