Milton CAT 320D FM User Manual

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Engine

Engine model Cat®C6.4 ACERT
Net Flywheel Power 117 kW 157 hp

Operating Weight (w/ front linkage, w/out bucket or grapple):

General Forestry (HW) 26 900 kg 59,315 lb
Log Loader (U/U) 30 300 kg 66,812 lb
Log Loader (HD/LC) 25 500 kg 56,228 lb

320D FM

Forest Machine

2

320D FM Forest Machines

The D Series incorporates innovations for improved performance, rugged durability
and maximum productivity.

Guarding

Factory forestry cab guarding, shoe
support guards and heavy-duty access
doors help extend component life,
reduces downtime and helps to protect
your forestry machine investment. pg. 8

Hydraulics

Forest Machine hydraulic systems
are designed to provide reliability,
outstanding controllability and proven
performance in various forestry
applications. pg. 5

Undercarriage

Heavy Duty link assemblies provide
toughness and durability. The FM track
will maximize undercarriage life and
minimize operating costs. pg. 9

Structures

Purpose-built carbody design uses
the most advanced manufacturing
processes, ensuring durability and
reliability in the most rugged forestry
applications. pg. 8

Power Train

The Cat®C6.4 with ACERT™
Technology gives the 320D FM
exceptional power and fuel efficiency
unmatched in the industry. The C6.4
meets U.S. EPA Tier 3 emissions
requirements. pg. 4

Operator Comfort

Spacious purpose built forestry cab with
excellent sightlines to the work area
with 8 lights and all scratch resistant
polycarbonate windows. Certified
FOPS to ISO 8084 and SAE 1084,
certified OPS to ISO 8083 and SAE
J231, certified FOGS to ISO 10262
and SAE J1356, certified TOPS to
OR-OSHA code 437-007-0775 TOPS
and WCBG602/G603/G604/G608
compliant. pg. 6

3

Serviceability

The new FM cooling package provides
easy access to all radiator cores for
faster cleanouts. Regularly scheduled
maintenance extends machine service
life and lowers overall operating costs.

pg. 11

Caterpillar Grapples

Cat Log Loading Grapples combined
with Cat Forest Machines make the
320D FM flexible, versatile and efficient
enough, allowing you to maximize
productivity on your forestry job. pg. 10

Versatility

Designed and purpose-built to meet
diverse forestry applications, the
320D FM can help improve productivity
in various forestry and millyard
applications. pg. 9

Owning and Operating Costs

Proven fuel efficiency combined with
easier access and extended service
intervals maximize uptime, reduce
operating costs and maximize
productivity. pg. 11

Customer Focus

Down time is minimized by the
utilization of a worldwide computer
network that can help find in-stock
parts and minimize your down time.
Your Cat dealer can also offer a wide
range of other services that can be set
up to meet your equipment needs.
The dealer will help choose the plan
that can cover everything from machine
and attachment selection to replacement.

pg. 12

Cat C6.4 ACERT. The Cat®C6.4 with

ACERT™ Technology gives the
320D FM exceptional power and fuel
efficiency unmatched in the industry.
The C6.4 meets U.S. EPA Tier 3
emissions requirements. The forestry
designed hydraulics give the 320D FM
exceptional power, efficiency and
controllability unequaled in the industry
for consistently high performance in
all forestry applications.

Performance. The 320D FM is equipped
with the C6.4 ACERT engine, which
provides 7% more horsepower as
compared to the Cat 3066 T engine.

Automatic Engine Speed Control.

The two-stage, one-touch control
maximizes fuel efficiency and reduces
sound levels.

ADEM™ A4 Engine Controller.

The ADEM A4 electronic control
module manages fuel delivery to get the
best performance per liter of fuel used.
The engine management system 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.

Electronic Control Module.

The Electronic Control Module (ECM)
works as the “brain” of the engine’s
control system, responding quickly to
operating variables to maximize engine
efficiency. Fully integrated with sensors
in the engine’s fuel, air, coolant, and
exhaust systems, the ECM stores and
relays information on conditions such as
rpm, fuel consumption, and diagnostic
information.

Fuel Delivery. The Cat C6.4 ACERT
features electronic controls that govern
the fuel injection system. 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. This translates into more
work output for your fuel cost.

Cooling System. The cooling fan
is directly driven from the engine.
An optional programmable reversible fan
allows for radiator blowout, to increase
service intervals and to maintain engine
operational temperatures. The optimum
fan speed is calculated based on the
target engine speed, coolant temperature,
hydraulic oil temperature and actual fan
speed. The Cat C6.4 ACERT delivered
a completely new layout that separates
the cooling system from the engine
compartment.

Air Cleaner. The radial seal air filter
features a double-layered filter core for
more efficient filtration and is located in
a compartment behind the cab. A warning
is displayed on the monitor when dust
accumulates above a preset level.

Noise Reduction Technologies.

The engine mounts are rubber-isolating
mounts matched with the engine
package. Further noise reduction has
been achieved through design changes
to the isolated top cover, oil pan,
multiple injection strategy, insulated
timing cover, sculpted crankcase
and gear train refinements.

4

Power Train

The Cat®C6.4 has exceptional power and fuel efficiency unmatched in the industry
for consistently high performance in both forestry and millyard applications.

Component Layout. The 320D FM
hydraulic system and component
locations have been designed to provide
a high level of system efficiency.
The main pumps, control valves and
hydraulic tank are located close together
to allow for shorter tubes and lines
between components that reduce friction
loss and pressure drops in the lines.
The layout further provides greater
operator comfort by placing the radiator
on the cab side of the upper structure.
This allows incoming air to enter the
engine compartment from the operator
side and hot air and corresponding
engine sound to exit on the opposite
side away from the operator. This reduces
engine compartment heat and sound
being transmitted to the operator.

Pilot System. The pilot pump is
independent from the main pumps and
controls the front linkage, swing and
travel operations.

Hydraulic Cross Sensing System.

The hydraulic cross sensing system
improves productivity with faster
implement speeds and quicker,
stronger pivot turns.

Boom and Stick Regeneration Circuit.

Boom and stick regeneration circuit
saves energy during boom-down and
stick-in operation which increases
efficiency, reduces cycle times and
pressure loss for higher productivity,
lower operating costs and increased
fuel efficiency.

Fine Swing Control. Standard fine swing
control cushions start and stop for better
implement control.

Controllability. The hydraulic system
offers precise control to the 320D FM
reducing operator fatigue, improving
operator effectiveness and efficiency,
which ultimately translates into
enhanced performance.

Auxiliary Hydraulic Valve. The auxiliary
valve is standard on the 320D FM.
Control Circuits are available as
attachments, allowing for operation
of high and medium pressure tools
such as grapples.

Hydraulic Cylinder Snubbers.

Snubbers are located at the rod-end
of the boom cylinders and both ends
of the stick cylinders to cushion shocks,
reduce sound and increase cylinder life,
increasing uptime and productivity.

5

Hydraulics

Cat®hydraulics provide the power and control needed for a variety of applications.

Operator Station. The workstation
is spacious, quiet and comfortable,
assuring high productivity during
a long work day. Controls, joysticks
and an ergonomically designed seat
reduces operator fatigue.

6

Operator Comfort

The purpose built forestry cab interior layout maximizes operator space, provides
exceptional comfort, provides excellent sightlines and reduces operator fatigue.