Milton CAT 385C L User Manual
Engine
Engine Model Caterpillar®C18 ATAAC
Net Flywheel Power 382 kW 513 hp
Weights
Operating Weight – 84 980 kg 187,360 lb
Long Undercarriage
• General Purpose Boom, R4.4 (14'5") stick, 1678 mm (66")
Bucket, and 900 mm (36") shoes.
Drive
Maximum Travel Speed 4.4 kph 2.8 mph
Maximum Drawbar Pull – 592 kN 133,090 lb
Long Undercarriage
385C L
Hydraulic Excavator
®
®
2
385C L Hydraulic Excavator
High performance and rugged durability combine to maximize your productivity.
High level of sustained production,
higher deep trenching and pipe-laying
performance, improved reliability and
durability increase your productivity
and lower your operating costs.
Buckets
A wide variety of bucket types,
aggressive bucket designs and larger
capacity bucket options take advantage
of the powerful digging forces and
stable base this is offered with the
385C L. pg. 12
Front Linkage
Caterpillar excavator booms and sticks
are built for performance and long
service life. Two types of booms and
six lengths of sticks are available,
offering a range of configurations
suitable for a wide variety of
applications. All booms and sticks
are stress relieved. pg. 11
Operator Station
An all-new cab provides improved
visibility and comfort. The new monitor
is a full-color graphical display with
enhanced functionality to provide simple,
comprehensive machine interface. pg. 6
✔
Hydraulics
Proportional Priority Pressure
Compensated (PPPC) system with
state-of-the-art electronic control
ensures hydraulic system efficiency
and excellent productivity. pg. 5
✔
Engine
The Cat®C18 engine has state-of-the-art
ACERT®technology to meet U.S. EPA
Tier 3 emission regulations, with
exceptional performance capabilities
and proven reliability. pg. 4
✔
✔ New Feature
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Complete Customer Support
Your Cat dealer offers a wide range
of services that can be set up under a
customer support agreement when you
purchase your equipment. The dealer
will help you choose a plan that can
cover everything from machine
configuration to eventual replacement.
pg. 14
Service and Maintenance
Fast, easy service has been designed
in with extended service intervals,
advanced filtration, convenient filter
access and user-friendly electronic
diagnostics for increased productivity
and reduced maintenance costs. pg. 13
Structures
Caterpillar design and manufacturing
techniques assure outstanding durability
and service life from these important
components. The 385C L upper frame
main channels are box section, connected
by a large diameter tube in the boom
foot area for strength and rigidity. pg. 10
Undercarriage
Cat designed excavator undercarriage
is stable, durable and low maintenance.
The undercarriage is a long, variable
gauge type for good machine stability
and transportability. New greaselubricated track provides longer life
and quieter operation. pg. 9
Electronic Control System
Engine and machine Electronic Control
Modules maximize fuel efficiency and
performance by maintaining the optimum
balance between engine speed and
hydraulic demand. pg. 8
Diesel Engine. The Caterpillar C18,
with ACERT technology, is a 18.1 liter,
six-cylinder, 382 kW (513 hp) engine
with mechanically actuated electronic
fuel injection (MEUI) and overhead
camshaft. ACERT technology provides
outstanding engine performance through
advanced electronic control, precision
fuel delivery, and refined air management.
Fuel Consumption. The Advanced Diesel
Engine Management (A4) controller
uses sensors throughout the engine to
manage engine load and performance.
The A4 controller is the muscle behind
engine responsiveness, self-diagnostics,
controlling emissions, and fuel economy.
Fuel System. C18 engine uses a
mechanically actuated electrically
controlled unit injection (MEUI) system.
The MEUI system combines highpressure injection and electronic control
in a single compact unit. The electronic
unit injector is an integral part of the
C18 fuel system. Computerized electronic
control provides precise metering and
timing of fuel injection.
Cooling System. High capacity,
side-by-side cooling system allows
operation in ambient temperatures
up to 52 degree C (126 degree F).
The Electric Power Control (EPC)
controls the fan speed based on coolant
temperature and hydraulic oil temperature
for optimized cooling.
Turbocharger. The C18 engine uses a
water-cooled, center-section waste gated
turbocharger for improved performance.
This turbocharger controls the air volume
to the cylinders and works efficiently
during low and high load conditions.
Emissions. ACERT Technology is a
differentiated technology that reduces
emissions at the point of combustion.
The technology capitalizes on
Caterpillar’s proven leadership in
three core engine systems: fuel, air
and electronics.
Cold Weather Starting Kit. The kit
consists of two additional batteries,
heavy-duty harness, large capacity
starting motor, and the ether starting
aid. With this kit, the 385C L has the
capability to start at –32 degree C
(–25.6 degree F).
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Engine
A combination of innovations working at the point of combustion, ACERT technology
optimizes engine performance while meeting EPA Tier 3 emission regulations.
PPPC Hydraulics. Load sensing,
Proportional Priority Pressure
Compensation (PPPC) system,
with Caterpillar-developed electronic
actuation, provides high efficiency
and excellent controllability.
• Cylinder speed is directly related
to operator’s movement of joystick
from feathering to full speed.
• Flow to cylinders during
multifunctional operation is directly
controlled by the operator and is
not dependent on loads.
• Controller reduces pump output
to minimum to save power when
joysticks are in neutral position.
Main Pumps. Large, heavy-duty main
pumps and a separate swing pump
provide quick cycle times during
multi-function operation.
Power Management Control.
The pump-valve electronic controller
is central to power management and
provides highly efficient control of
the pumps, valves, and engine.
Reverse Swing Damping Valve.
Swing dampening valves reduce swing
wag and produce smooth swing stops.
Auxiliary Hydraulic Valve. The auxiliary
valve is standard on the 385C L.
The standard auxiliary valve is for use
with optional control arrangements to
operate tools such as hammers and
shears. Flow settings can be programmed
for up to four tools, which the operator
can select through the monitor.
Heavy Lift Standard. The operator can
select the heavy lift mode at the push
of a button to boost lifting capability
and provide improved controllability
of heavy loads.
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Hydraulics
Cat hydraulics deliver power and precise control to keep material moving.
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Designed for simple, easy operation and comfort, the 385C L allows the operator to focus
on production.
Operator Station
Cab Design. The work station has
been designed to be spacious, quiet
and comfortable. Operator comfort,
and a high level of visibility assure
productivity throughout the entire
workday. The monitor and switches
are conveniently located for easy
access and visibility.
Seat. The 385C L seat provides a
variety of adjustments, including
fore/aft, height and weight to suit the
operator. Also included are adjustable
armrests and a retractable seat belt.
For additional comfort, a new heated
air suspension seat is available as
an attachment.
Hydraulic Activation Control Lever.
The hydraulic activation control
lever deactivates hydraulic functions
during engine start-up, and prevents
unintentional machine operation.
Climate Control. Positive filtered
ventilation with a pressurized cab
comes standard on the 385C L.
Fresh air or re-circulated air can
be selected, and the automatic
climate control maintains constant,
comfortable temperature.
Windows. To maximize visibility,
all glass is affixed directly to the cab
eliminating the use of window frames.
The upper front windshield opens,
closes and stores on the roof above the
operator with a one-touch action release
system. The lower front windshield
features a rounded design to maximize
downward visibility and improves
wiper coverage.
Wipers. Pillar-mounted parallelogram
wiper, including a washer nozzle,
increases the operator’s viewing area and
offers continuous and intermittent modes.
Skylight. An enlarged skylight with
sunshade provides excellent visibility
and good ventilation.
Consoles. Redesigned consoles feature
a simple, functional design to reduce
operator fatigue, ease of switch operation
and excellent visibility. Both consoles
have attached armrests and allow the
height of the armrests to be adjusted.
Monitor. The compact, full-color,
graphical display monitor is new with
the 385C L. The monitor has functions
to display machine, maintenance,
diagnostic and prognostic information.
The angle of the monitor can be adjusted
to face the operator and prevent sun glare.
Cab Mounts. The cab shell is attached
to the frame with viscous rubber cab
mounts, which dampen vibrations
and sound levels while enhancing
operator comfort.
Standard Cab Equipment. To enhance
operator comfort and productivity,
the 385C L cab includes a lighter,
drink holder, coat hook, service meter,
literature holder, magazine rack and
storage compartment. The cab also
comes equipped with two, 12V-7 Amp
electrical sockets to provide additional
electrical resources.
Machine Security. An optional Machine
Security System (MSS) is available from
the factory on the 385C L. MSS uses
a special Caterpillar key with an
embedded electronic chip for controlling
unauthorized machine operation.
Product Link. The 385C L is “Product
Link Ready” from the factory.
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Monitor Display Screen. The monitor
is a full color 400 234 pixels Liquid
Crystal Display (LCD) graphic display.
The Master Caution Lamp the action
lamp blinks ON and OFF when one of
the critical conditions below occurs:
• Engine oil pressure low
• Coolant temperature high
• Hydraulic oil temperature high
Under the normal condition or the
default condition, the monitor display
screen is divided into four areas; clock
and throttle dial area, gauge area, event
display area and multi-information
display area.
Clock and Throttle Dial Display.
The clock, throttle dial and gas-station
icon with green color are displayed in
the area.
Gauge Display. Three analog gauges,
fuel level, hydraulic oil temperature
and coolant temperature, are displayed
in the this area.
Event Display. Machine event
information is displayed in the area
along with the icon and language.
Operator Gain/Response. Used to suit
the operators preference or application.
• Quicker, for fast response and more
production
• Slower, for more precision
• Three preset settings with 21 available
Pattern Control Changer. The standard
hand control pattern changer can be
accessed through the monitor, to utilize
either the standard excavator control
pattern (SAE) or Backhoe-loader
pattern (BHL).
Electronic Joysticks. Electronic
joysticks provide features not possible
with hydraulic pilot valves:
• Eliminate pilot lines in cab for
quieter operation
• Simple pattern change through
the monitor
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Electronic Control System
Manages the engine and hydraulics for maximum performance.
Undercarriage Components.
Large, Caterpillar designed and built
undercarriage components offer heavyduty performance and durability.
Track Rollers. Heavy-duty track rollers,
carrier rollers and idlers are sealed and
lubricated for excellent service life.
Idler Guards and Track Guides.
Standard idler guards and center
track guides maintain track alignment.
Additional sprocket and idler end
guards, as well as two-piece full-length
guards are optional for additional
protection on steep side slopes.
Track. The 385C L comes standard with
the new grease lubricated track called
GLT4. The track links are assembled
and sealed with grease to decrease
internal bushing wear, reduce travel
noise and extend service life lowering
operating costs.
Travel Motor. Two-speed axial piston
hydraulic motors provide the 385C L
drive power and automatic speed
selection when the high-speed position
is selected. This enables the machine
to automatically change between
computer-controlled high and low
speeds depending on drawbar-pull
requirements.
Final Drives. The final drives are the
three-stage reduction planetary types.
This design results in a complete
drive/brake unit that is compact
and delivers excellent performance
and reliability.
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Undercarriage
Durable undercarriage absorbs stresses and provides excellent stability.
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