Milton CAT D7E Tier 4 Interim-Stage IIIB - Manual (Page 3)

Powertrain
First-of-its-kind
Electric
Drive
delivers
power
and
effi
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
effi
ciently
converts
mechanical
energy
into
AC
electrical
current.
Electrical
current
from
the
generator
flows
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
final
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
efficient
at
delivering
engine
power
to
the
ground.
Infinitely
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
simplified
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.
Benefi ts
•
Fuel
efficiency:
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
fl
uids,
and
fewer
replacement
parts.
•
Increased
efficiency:
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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