320 GX

HYDRAULIC EXCAVATOR

Engine Power (ISO 14396:2002) 108 kW (145 hp)

Operating Weight 20 500 kg (45,300 lb)
Cat® C4.4 Engine meets China Nonroad Stage III emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA.
 THE NEW Introducing the 320 GX – our economy

CAT 320 GX ®
model with all the reliability and ease
of operation you expect from a Cat®
excavator, with easy maintenance and
lower cost features designed to give
you a faster return on your equipment

FEATURES FOR FAST PAYBACK 1 investment.

CAT® EXCAVATORS
Cat excavators offer you more choices than ever for your business.
+ MORE MODEL OPTIONS
+ MORE FUEL EFFICIENCY
+ MORE PRICE POINTS

Ready to help you make your business stronger, Cat excavators give you new ways to get the most work done at the
lowest cost so you can put more money in your pocket.

1
Payback period may vary depending on purchase price, interest rates, down payment, fuel consumption, maintenance costs, local rental rates, and other factors
as applicable. Talk to your local Cat dealer about estimated payback period.

2 320 GX HYDRAULIC EXCAVATOR

EASY TO
OPERATE AND MAINTAIN

Trust Caterpillar’s time-proven engineering and

manufacturing know-how for easy operation and
excellent reliability.

+ Stable and responsive design increases jobsite efficiency.

+ Boom, stick, and bucket linkages are built to withstand
typical 20-ton work demand, so you can be confident
working in a wide variety of applications.
+ Automatic hydraulic oil warm up makes work more
efficient and helps prevent premature wear of
components, so you get longer service life.
+ Cat undercarriage comes with track pins and bushings
grease sealed to enhance performance and service life.

320 GX HYDRAULIC EXCAVATOR 3

 LOWER MAINTENANCE COSTS
INCREASE YOUR PROFIT

UP TO 20% MAINTENANCE INTERVAL

IMPROVEMENTS
320 GX D2 SERIES

LOWER MAINTENANCE COSTS Hours Hours

Replace Hydraulic Oil Case Initial 250 +
Better filters with extended maintenance intervals mean No filter needed
Drain Filter Every 1,000
you will do more work with less downtime and lower cost.
Initial 250 +
In fact, the 320 GX has maintenance-free batteries and a Replace Hydraulic Oil Pilot Filter No filter needed
Every 1,000
hydraulic oil system that requires no maintenance for 3,000 Replace Hydraulic Oil Initial 250 +
hours. When you do have to perform maintenance, filters Every 3,000
Return Filter Every 2,000
and drains are grouped together to make it quick and easy. Initial 500 + Initial 250 +
Change Swing Drive Oil
Every 1,000 Every 1,000
Replace Fuel Filters Every 1,000 Every 500
MAKE MANAGING ASSETS EASIER Clean Fuel Tank Strainer When needed Every 500
Replace Fuel Tank Cap Filter Every 2,000 Every 1,000
Cat Link telematics take the complexity out of managing
your assets. Product Link™ automatically collects data like
maintenance alerts, machine location, and fuel use. You can
access the data anytime, anywhere with VisionLink®. Use
it to make informed decisions that will simplify maintenance,
boost productivity, lower costs, and improve safety and
security on your jobsite.

4 320 GX HYDRAULIC EXCAVATOR

 FAST A new choice to help make
your business stronger, the

PAYBACK
new Cat 320 GX features easy
operation and maintenance, plus
productivity balanced with low
costs for fast payback.

LOW LOW LOW

OWNING COSTS FUEL CONSUMPTION MAINTENANCE COSTS
The 320 GX features simplified options Synchronized engine and electrohydraulic Extended maintenance intervals, better
for reduced acquisition costs to help you systems lower fuel consumption. Smart filters, maintenance-free batteries, and
get the most work done at a lower cost. mode helps you further reduce fuel costs a hydraulic oil system that requires no
Everything about the 320 GX, like its robust by automatically adapting engine speed maintenance for 3,000 hours all contribute
structures, access to components, and for your specific application. to low maintenance costs.
widely available parts, is designed to put
more money in your pocket.

320 GX HYDRAULIC EXCAVATOR 5

REDUCE FUEL CONSUMPTION
FUEL SAVINGS
BY UP TO 15% 1
The Cat C4.4 engine and electrohydraulic system
ADD UP
work in sync to help you move plenty of material while FUEL BURN PER YEAR
using less fuel.

21 960 L
THE 320 GX ADVANTAGE
320 GX 3960 L SAVED!
WORK SMART. 320D2 GC 25 920 L
SAVE MONEY.
The Cat 320 GX is equipped with two modes to SCENARIO
help manage fuel consumption for your specific
applications – Power mode and Smart mode. Excavators completing typical excavation work.

CALCULATION
Power mode is the traditional setting where you can
manually dial engine speed up or down based on your 320D2 GC: 320 GX:
14.4 L/HR x 1,800 HR/YR=25 920 L/YR 12.2 L/HR x 1,800 HR/YR=21 960 L/YR
work. Smart mode automatically adapts engine speed
for you – up for high productivity and down for lighter
loading, resulting in higher operating efficiency.

1
Compared to 320D2 GC Tier 3 global fuel burn averages.

6 320 GX HYDRAULIC EXCAVATOR

BUILT-IN SAFETY 1,000 WAYS TO STAY SAFE.
SLIPPING IS ONE OF THE
LOOK OUT FOR YOUR PEOPLE FACT: BIGGEST CONTRIBUTORS
AND YOUR EQUIPMENT TO WORKPLACE INJURIES.*
+ Smooth handrails and anti-skid steps make getting on
and off the machine more secure.
+ Daily maintenance checks can be performed with
most points accessible from ground level, making the
maintenance faster, easier, and safer.
+ The storage box lid is lockable to protect your gear.
+ The cab’s wider field of view and available rearview
camera enhance jobsite visibility.

OUR ANTI-SKID PLATES FEATURE

1,000+ INDIVIDUAL PERFORATIONS

FOR BETTER TRACTION
*SOURCE: HTTPS://WWW.OSHA.GOV/DTE/GRANT_MATERIALS/FY07/SH-16625-07/SLIPSTRIPSFALLS.PPT

320 GX HYDRAULIC EXCAVATOR 7

CAB TAKES
THE HARD
OUT OF WORK
Comfort and movement efficiency help keep operators
productive and alert all shift long. The standard seat is wide
and adjustable to suit individual operator preferences. The
controls, including push-button start, are simple to use and
easy to reach, allowing you to operate comfortably with
minimal twists and turns.

SMART ALL-ROUND ACCESS, CONNECTIVITY,

DESIGN VISIBILITY AND STORAGE
Operator ID remembers your preferred Large windows and narrow cab pillars The AM/FM radio includes USB and
settings for power mode, joystick pattern, enable excellent visibility in all directions auxiliary ports for connecting and charging
and joystick response. Just plug in your from the operator seat. A rearview camera devices; a 24V DC outlet makes phone
password and go to work. Seat is an available option. charging even faster. Storage space in
adjustments, touchscreen monitor, and front of the controls can hold a large cup
controls are conveniently located to and wide cell phone. Storage behind the
reduce reaching and twisting. seat can hold a large lunchbox and other
items.

BUCKETS HYDRAULIC QUICK VIBRATORY

HAMMERS COUPLERS PLATES

INCREASE YOUR PRODUCTIVITY AND PROFIT WITH CAT ATTACHMENTS

You can easily expand the performance of your machine by using Cat attachments. Each Cat attachment is designed to fit the weight
and horsepower of the Cat excavator for improved performance, safety, and stability.

8 320 GX HYDRAULIC EXCAVATOR

When you buy Cat equipment,
you’re getting so much more than GET MORE
THAN A
the machine. You’re also getting the
support of a best-in-class dealer
network backed by a range of flexible

MACHINE
solutions, technology, tools, and
more. It’s all about support that’s built
around your success.

+ Customer Value Agreements (CVA) VALUE MADE EASY

+ Cost-saving service and repair options A Cat Customer Value Agreement (CVA) starts with hassle-free maintenance
featuring genuine Cat parts right on schedule. Security of expert dealer support
+ Quality parts and precision components
through an Equipment Protection Plan (EPP) can be included to minimize
+ Financing solutions surprise costs on covered repairs. Equipment Health Management provides
+ Rental and used equipment you with machine alerts and information, as well as inspections and fluid health
monitoring to give you more peace of mind. Hassle-free ownership simply means
all elements of your CVA are part of one agreement that can be included in your
monthly machine payment.

320 GX HYDRAULIC EXCAVATOR 9

TECHNICAL SPECIFICATIONS
See cat.com for complete specifications.

ENGINE DIMENSIONS
Engine Model Cat C4.4 Boom Reach 5.7 m (18'8")
Engine Power – ISO 14396:2002 108 kW 145 hp Stick Reach 2.7 m B1 (8'9")
Net Power – ISO 9249:2007 104 kW 139 hp Bucket GD 0.93 m³ (1.22 yd³)
Bore 105 mm 4 in Shipping Height (top of cab) 2950 mm 9'8"
Stroke 127 mm 5 in Handrail Height 3010 mm 9'11"
Displacement 4.4 L 269 in³ Shipping Length 9570 mm 31'5"
Biodiesel Capability Up to B20(1) Tail Swing Radius 2830 mm 9'3"
• Net power advertised is the power available at the flywheel when the Counterweight Clearance 1044 mm 3'5"
engine is equipped with fan, air cleaner, muffler, and alternator.
Ground Clearance 464 mm 1'6"
• Rated
 speed at 2,000 rpm.
(1)
Cat engines are compatible with the following renewable, alternative, and Track Length 4080 mm 13'5"
biofuels* with lower greenhouse gas emission impact: Length to Center of Rollers 3265 mm 10'9"
 Up to B20 biodiesel (FAME)**
 Up to 100% HVO and GTL renewable fuels Track Gauge 2200 mm 7'3"
* Refer to guidelines for successful application. Please consult your Transport Width – 600 mm (24”) Shoes 2800 mm 9’2”
Cat dealer or “Caterpillar Machine Fluids Recommendations”
(SEBU6250) for details. Transport Width – 790 mm (31") Shoes 2990 mm 9'10"
** For use of blends up to B100, consult your Cat dealer.
WORKING RANGES AND FORCES
HYDRAULIC SYSTEM Boom Reach 5.7 m (18'8")
429 L/min 113.4 gal/min Stick Reach 2.7 m B1 (8'9")
Main System – Maximum Flow –
(214.5 L/min (56.7 gal/min
Implement Bucket GD 0.93 m³ (1.22 yd³)
x 2 pumps) x 2 pumps)
Maximum Digging Depth 6430 mm 21'1"
Maximum Pressure – Equipment –
35 000 kPa 5,075 psi Maximum Reach at Ground Level 9580 mm 31'5"
Normal
Maximum Pressure – Travel 35 000 kPa 5,075 psi Maximum Cutting Height 9290 mm 30'6"
Maximum Pressure – Swing 25 000 kPa 3,625 psi Maximum Loading Height 6450 mm 21'2"
Minimum Loading Height 2460 mm 8'1"
SWING MECHANISM Maximum Depth Cut for 2440 mm (8'0")
6250 mm 20'6"
Swing Speed 11.07 rpm Level Bottom
Maximum Swing Torque 74 kN∙m 54,875 lbf-ft Maximum Vertical Wall Digging Depth 5510 mm 18'1"
Minimum Working Equipment Radius 3680 mm 12'1"
WEIGHTS
Bucket Digging Force (ISO) 136 kN 30,597 lbf
Operating Weight 20 500 kg 45,300 lb
Stick Digging Force (ISO) 106 kN 23,897 lbf
• Standard undercarriage, Reach boom, R2.7 (8'9") stick, GD 0.93 m3
(1.22 yd3) bucket, 790 mm (31") triple grouser shoes, and 3.6 mt (7,940 lb)
counterweight.
Operating Weight 19 900 kg 43,900 lb
• Standard undercarriage, Reach boom, R2.7 (8'9") stick, GD 0.93 m3
(1.22 yd3) bucket, 600 mm (24") triple grouser shoes, and 3.6 mt (7,940 lb)
counterweight.

SERVICE REFILL CAPACITIES

Fuel Tank 390 L 103 gal
Cooling System 24.5 L 6.5 gal
Engine Oil (with filter) 15 L 4 gal
Swing Drive 12 L 3.2 gal
Final Drive (each) 4.5 L 1.2 gal
Hydraulic System (including tank) 218 L 57.6 gal
Hydraulic Tank 115 L 30.4 gal

10 320 GX HYDRAULIC EXCAVATOR

STANDARD & OPTIONAL EQUIPMENT
Standard and optional equipment may vary. Consult your Cat dealer for details.

BOOMS & STICKS STANDARD OPTIONAL HYDRAULIC SYSTEM STANDARD OPTIONAL

5.7 m (18'8") Reach boom  Electronic main control valve,

2.5 m (8'2") Reach stick  hammer ready

2.7 m (8'10") Reach stick  Back-to-back, electronically controlled


pumps
CAB STANDARD OPTIONAL Boom and stick regeneration circuits 
Sound suppressed with viscous mounts  Automatic hydraulic oil warmup 
High-resolution 203 mm (8") LCD Automatic two-speed travel 

touchscreen monitor
Hammer lines 
Mechanically adjustable seat with headrest 
Hammer return filter 
Automatic bi-level air conditioner 
High performance hydraulic return filter 
Keyless push-to-start engine control 

Floor-mounted adjustable consoles  SAFETY AND SECURITY STANDARD OPTIONAL

1-button joystick  Anti-skid plating with countersunk bolts 

3-button joystick  FOGS with matching lights 

AM/FM radio with USB and aux port  Handrail and handhold 

24V DC outlet  Lockable external tool/storage box 

Cup holder and storage compartments  Rearview camera 

70/30 tempered glass windshield  Signaling/warning horn 

Upper radial wiper with washer  Hydraulic lockout lever 

Openable steel hatch  Travel alarm 

Dome light  SERVICE AND MAINTENANCE STANDARD OPTIONAL

Washable floor mat  Grouped location of filters 

CAT TECHNOLOGIES STANDARD OPTIONAL Radiator screen 

Cat Product Link™  Scheduled Oil Sampling (S•O•S ) ports

SM 

ELECTRICAL SYSTEM STANDARD OPTIONAL UNDERCARRIAGE AND STRUCTURES STANDARD OPTIONAL

750 CCA maintenance-free batteries (x2)  600 mm (24") triple grouser track shoes 

Electrical disconnect switch  790 mm (31") triple grouser track shoes 

LED boom, chassis, and cab lights  Grease lubricated track link 

LED left-side boom light  Center track guiding guard 

LED right-side boom light  Bottom guards 

Travel motor guards 

ENGINE STANDARD OPTIONAL
3.6 mt (7,940 lb) counterweight 
Two selectable modes: Power, Smart 
Tie-down points 
Up to 4500 m (14,764 ft) altitude capability 

52°C (125°F) high-ambient cooling capability 

-18°C (0°F) cold start capability 

Electric fuel priming pump 

Two-stage fuel filtration system 

Sealed double-element air filter with


precleaner

Not all features are available in all regions. Please check with your local Cat dealer for specific offering availability in your area.
For additional information, refer to the Technical Specifications brochures for the 320 GX available at www.cat.com or your Cat dealer.

320 GX HYDRAULIC EXCAVATOR 11

For more complete information on Cat products, dealer services and industry solutions, visit us on the web at www.cat.com. AEXQ3300-00
Build Number: 05A
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except Brazil, SE Asia)
Materials and specifications are subject to change without notice. Featured machines in photos may include additional
equipment. See your Cat dealer for available options.

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