EASY TO OPERATE AND MAINTAIN

Stable and responsive design built on classic, proven components for easy operation and excellent reliability.

FAST PAYBACK

Low owning costs, maintenance costs, and fuel consumption means more money in your pocket.

Up To 15% LOWER FUEL CONSUMPTION

Smart mode and synchronized engine and electrohydraulic control give you competitive performance with low fuel consumption.

Medium Excavators 320 GX - Tier 3

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Key Specs

Net Power - ISO 9249: 139 HP; 103.6 kW

Operating Weight: 45300 lb; 20500 kg

Maximum Digging Depth: 21.1 ft; 6430 mm

320 GX - Tier 3
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Overview

FEATURED FOR FAST PAYBACK

Introducing the 320 GX – our economy 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 investment.

Benefits

EASY TO OPERATE AND MAINTAIN

Stable and responsive design built on classic, proven components for easy operation and excellent reliability.

FAST PAYBACK

Low owning costs, maintenance costs, and fuel consumption means more money in your pocket.

Up To 15% LOWER FUEL CONSUMPTION

Smart mode and synchronized engine and electrohydraulic control give you competitive performance with low fuel consumption.

Features At A Glance

Latest Features

Make the jobsite safer with an optional swing alarm.
An optional ISO certified Rollover Protective Structure (ROPS) cab helps protect the operator in the event of a rollover.

Not all features are available in all regions. Please check with your local Cat dealer for specific offering availability in your area.
Build Number: 05D

Easy to Operate

The machine’s electrohydraulic system allows accurate bucket control for maximum precision.
Start the engine with a push button.
Navigate quickly on the high-resolution 203 mm (8 in) touchscreen monitor
Control the excavator comfortably with easy-to-reach controls all located in front of you.
Program your preferences for power mode, joystick pattern, and joystick response using Operator ID. The excavator will automatically remember your selections.

Easy to Maintain

Do daily maintenance at ground level.
Up to 20 percent less maintenance cost than the 320D2 GC due to enhanced filters and extended and synchronized service intervals (savings calculated over 12,000 machine hours).
The air intake filter with precleaner has double the dust holding capacity of the previous air intake filter. Final drive and swing drive oil is double the initial service life – from 250 to 500 hours.
Fuel filters are synchronized to be changed at 1,000 hours – double the interval from the previous filters.
The hydraulic oil filter provides improved filtration performance, anti-drain valves to keep oil clean when the filter is
replaced, and longer life with a 3,000-hour replacement interval – 50 percent longer than previous filter designs.
Grease sealed between track pins and bushings reduces travel noise and prevents debris from entering to help increase undercarriage life.
Auto warm up speeds up hydraulic oil warming in cold temperatures and helps prolong the life of components.
Advansys™ bucket tips increase penetration and improve cycle times. Tip changes can be done quickly with a simple lug wrench instead of a hammer or special tool, improving safety and uptime.
S·O·S^SM oil sampling ports are on ground level, simplifying maintenance and allowing for quick, easy extraction of fluid samples for analysis

Low Owning and Operating Costs

The excavator uses up to 15 percent less fuel than the 320D2 GC in similar applications.
Match the excavator to the job with a choice of two modes: Power and Smart. Power mode provides full-time maximum output. Smart mode automatically matches engine and hydraulic power to digging conditions to help conserve fuel without impacting production.
Product Link™ comes standard so you can remotely monitor fuel consumption as well as machine health, location, and hours on demand through VisionLink®.
Save fuel with Automatic Engine Control (AEC). It reduces engine speed when the machine is not under load to minimize fuel consumption.

Reliable Performance

A versatile machine that performs well in bucket and hammer applications.
Booms and sticks are robotically welded and checked ultrasonically to ensure maximum durability.
Reliable and durable and built on classic, proven components.
The Cat C4.4 engine and electrohydraulic system work in sync to help you move plenty of material while using less fuel.
Fast cycle times give you excellent productivity.
A hammer-ready valve is standard for added versatility.
Two levels of fuel filtration protect the engine from contaminated diesel fuel.
Cat undercarriage is built strong to absorb jobsite stresses for enhanced performance and durability.
General duty buckets are designed for fast material discharge and cleaning.
Work up to 4500 m (14,760 ft) above sea level with engine power derate above 3000 m (9,840 ft).
Standard high-ambient temperature capability is 52°C (125°F) with cold start capability at -25°C (-13°F).

Work in Comfort

The cab has a wide seat that adjusts to suit individual operator preferences.
Standard automatic climate control helps keep you comfortable all shift long.
Excellent work site visibility from the cab enhances productivity and safety.
Optimized low-effort joystick controls reduce operator fatigue.
Convenience features include a radio, auxiliary port for headphones, and a USB port for connecting and charging devices; a 24V DC outlet makes phone charging even faster.
Use the radio’s Bluetooth® technology to make hands-free calls.
The cup holder and storage space in front of the controls can hold large cups and wide cell phones; storage behind the seat can hold a large lunchbox and other items.

Enhanced Safety

Access daily maintenance points from ground level with the exception of the engine oil level – no need to climb on top of the excavator to check filters or grease linkage.
An optional ISO certified Rollover Protective Structure (ROPS) cab is offered in some regions to help protect the operator in the event of a rollover.
Enjoy great visibility into the trench, in each swing direction, and behind you with the help of smaller cab posts and larger windows.
An optional rearview camera enhances visibility.
Anti-skid plating on the service platform helps prevent slipping.
The handrails meet ISO 2867:2011 requirements for added safety.
Keep your excavator secure with Operator ID. Use your PIN code on the monitor to enable the push button starting feature.
Enhance jobsite safety. Add a swing alarm to alert people when you're rotating from trench to stockpile and back again.

Full Specifications Standard Equipment Optional Equipment

Product Specifications for 320 GX - Tier 3

Engine

Net Power - ISO 9249	139 HP 103.6 kW
Net Power - ISO 9249 - Metric	141 Metric HP 141 Metric HP
Engine Model	Cat C4.4 Cat C4.4
Engine Power - ISO 14396	145 HP 108 kW
Power - ISO 14396 - Metric	147 Metric HP 147 Metric HP
Bore	4 in 105 mm
Stroke	5 in 127 mm
Displacement	269 in³ 4.4 l
Note (1)	Advertised power is tested per the specified standard in effect at the time of manufacture. Advertised power is tested per the specified standard in effect at the time of manufacture.
Note (2)	Net power advertised is the power available at the flywheel when the engine is equipped with fan, air intake system, exhaust system and alternator. Net power advertised is the power available at the flywheel when the engine is equipped with fan, air intake system, exhaust system and alternator.
Note (3)	Engine speed at 2,000 rpm. Engine speed at 2,000 rpm.

Hydraulic System

Main System - Maximum Flow - Implement	113.4 gal/min 429 l/min
Maximum Pressure - Equipment	5075 psi 35000 kPa
Maximum Pressure - Travel	5075 psi 35000 kPa
Maximum Pressure - Swing	3626 psi 25000 kPa

Swing Mechanism

Swing Speed	11.07 r/min 11.07 r/min
Maximum Swing Torque	54875 ft·lbf 74 kN·m

Weights

Operating Weight

45300 lb 20500 kg

Service Refill Capacities

Fuel Tank Capacity	103 gal (US) 390 l
Cooling System	6.5 gal (US) 24.5 l
Engine Oil	4 gal (US) 15 l
Swing Drive	1.5 gal (US) 5.5 l
Final Drive - Each	1.2 gal (US) 4.5 l
Hydraulic System - Including Tank	57.6 gal (US) 218 l
Hydraulic Tank	30.4 gal (US) 115 l

Dimensions

Boom	Reach 5.7 m (18'8") Reach 5.7 m (18'8")
Stick	Reach R2.7 m (8'10") Reach R2.7 m (8'10")
Bucket	GD 0.93 m³ (1.22 yd³) GD 0.93 m³ (1.22 yd³)
Shipping Height - Top of Cab	9.9 ft 2970 mm
Handrail Height	9.11 ft 3010 mm
Shipping Length	31.5 ft 9570 mm
Tail Swing Radius	9.3 ft 2830 mm
Counterweight Clearance	3.5 ft 1040 mm
Ground Clearance	1.6 ft 460 mm
Track Length	13.5 ft 4080 mm
Track Length to Center of Rollers	10.9 ft 3270 mm
Track Gauge	7.3 ft 2200 mm

Dimensions - Reach Boom - 5.7 m (18'8)

Transport Width - 790 mm (31 in) Shoes

9.1 ft 2990 mm

Dimensions - Reach Boom - 5.7 m (18'8)

Transport Width - 600 mm (24 in) Shoes

9.2 ft 2800 mm

Working Ranges & Forces

Maximum Digging Depth	21.1 ft 6430 mm
Boom	Reach 5.7 m (18'8") Reach 5.7 m (18'8")
Stick	Reach R2.7 m (8'10") Reach R2.7 m (8'10")
Bucket	GD 0.93 m³ (1.22 yd³) GD 0.93 m³ (1.22 yd³)
Maximum Reach at Ground Level	31.5 ft 9580 mm
Maximum Cutting Height	30.6 ft 9290 mm
Maximum Loading Height	21.1 ft 6450 mm
Minimum Loading Height	8.1 ft 2460 mm
Maximum Depth Cut for 2440 mm (8 ft) Level Bottom	20.6 ft 6250 mm
Maximum Vertical Wall Digging Depth	18.1 ft 5510 mm
Bucket Digging Force - ISO	30597 ft·lbf 136 kN
Stick Digging Force - ISO	23897 ft·lbf 106 kN

320 GX - Tier 3 Standard Equipment

NOTE

Standard and optional equipment may vary. Consult your Cat dealer for details.

BOOMS AND STICKS

5.7 m (18'8") Reach boom

CAB

Sound suppressed with viscous mounts

High-resolution 203 mm (8") LCD touch screen monitor

Mechanically adjustable seat with headrest and armrest

51 mm (2") orange seat belt

Auto bi-level air conditioner

Keyless push-to-start engine control

Fixed left-side console

1 button joysticks

Bluetooth® radio with USB/Aux ports

24V DC outlet

Cup holder and storage compartments

70/30 tempered glass windshield

Rear window emergency exit

Upper radial wiper with washer

Openable steel hatch

LED Dome light

Washable floor mat

CAT TECHNOLOGY

Cat Product Link™

ELECTRICAL SYSTEM

Maintenance-free 950 CCA batteries (x2)

Electrical disconnect switch

LED chassis and cab lights

LED left-side boom light

ENGINE

Cat C4.4 single turbo diesel engine

Two selectable modes: Power, Smart

Up to 4500 m (14,760 ft) altitude capability

52°C (125° F) high-ambient cooling capacity

-25°C (-13° F) cold start capability

Electric fuel priming pump

Two-stage fuel filtration system

Sealed double element air filter with integrated pre-cleaner

HYDRAULIC SYSTEM

Electronic main control valve, hammer ready

Back-to-back electronic pumps

Boom and stick regeneration circuits

Automatic hydraulic oil warmup

Automatic two-speed travel

High performance hydraulic return filter

SAFETY AND SECURITY

Anti-skid plating with countersunk bolts

Handrail and hand hold

Lockable external tool/storage box

Signaling/warning horn

Hydraulic lockout lever

SERVICE AND MAINTENANCE

Grouped engine oil and fuel filters

Sampling ports for Scheduled Oil Sampling (S·O·S)

UNDERCARRIAGE AND STRUCTURES

Grease lubricated track link

Center track guiding guard

Bottom guards

Travel motor guards

3600 kg (7,940 lb) counterweight

Tie-down points

320 GX - Tier 3 Optional Equipment

NOTE

Standard and optional equipment may vary. Consult your Cat dealer for details.

BOOMS AND STICKS

2.5 m (8'2") Reach stick

2.7 m (8'9") Reach stick

CAB

3 button joysticks

ELECTRICAL SYSTEM

LED right-side boom light

HYDRAULIC SYSTEM

Hammer lines

Hammer return filter

SAFETY AND SECURITY

FOGS with matching lights

Rearview camera

Rear- and right-side-view cameras (mandatory for Kingdom of Saudi Arabia; not available in other regions)

Rollover protective structure (ROPS) (mandatory for Kingdom of Saudi Arabia; optional in Africa, Middle East, South America; not available in other regions)

Travel alarm (standard in South America)

Swing alarm

Lockout device for disconnect switch (mandatory for Kingdom of Saudi Arabia; not available in other regions)

UNDERCARRIAGE AND STRUCTURES

600 mm (24") triple grouser track shoes

SERVICE AND MAINTENANCE

Radiator screen

790 mm (31") triple grouser track shoes

Product Specifications for 320 GX - Tier 3

Download Print

Engine

Net Power - ISO 9249	139 HP 103.6 kW
Net Power - ISO 9249 - Metric	141 Metric HP 141 Metric HP
Engine Model	Cat C4.4 Cat C4.4
Engine Power - ISO 14396	145 HP 108 kW
Power - ISO 14396 - Metric	147 Metric HP 147 Metric HP
Bore	4 in 105 mm
Stroke	5 in 127 mm
Displacement	269 in³ 4.4 l
Note (1)	Advertised power is tested per the specified standard in effect at the time of manufacture. Advertised power is tested per the specified standard in effect at the time of manufacture.
Note (2)	Net power advertised is the power available at the flywheel when the engine is equipped with fan, air intake system, exhaust system and alternator. Net power advertised is the power available at the flywheel when the engine is equipped with fan, air intake system, exhaust system and alternator.
Note (3)	Engine speed at 2,000 rpm. Engine speed at 2,000 rpm.

Hydraulic System

Main System - Maximum Flow - Implement	113.4 gal/min 429 l/min
Maximum Pressure - Equipment	5075 psi 35000 kPa
Maximum Pressure - Travel	5075 psi 35000 kPa
Maximum Pressure - Swing	3626 psi 25000 kPa

Swing Mechanism

Swing Speed	11.07 r/min 11.07 r/min
Maximum Swing Torque	54875 ft·lbf 74 kN·m

Weights

Operating Weight

45300 lb 20500 kg

Service Refill Capacities

Fuel Tank Capacity	103 gal (US) 390 l
Cooling System	6.5 gal (US) 24.5 l
Engine Oil	4 gal (US) 15 l
Swing Drive	1.5 gal (US) 5.5 l
Final Drive - Each	1.2 gal (US) 4.5 l
Hydraulic System - Including Tank	57.6 gal (US) 218 l
Hydraulic Tank	30.4 gal (US) 115 l

Dimensions

Boom	Reach 5.7 m (18'8") Reach 5.7 m (18'8")
Stick	Reach R2.7 m (8'10") Reach R2.7 m (8'10")
Bucket	GD 0.93 m³ (1.22 yd³) GD 0.93 m³ (1.22 yd³)
Shipping Height - Top of Cab	9.9 ft 2970 mm
Handrail Height	9.11 ft 3010 mm
Shipping Length	31.5 ft 9570 mm
Tail Swing Radius	9.3 ft 2830 mm
Counterweight Clearance	3.5 ft 1040 mm
Ground Clearance	1.6 ft 460 mm
Track Length	13.5 ft 4080 mm
Track Length to Center of Rollers	10.9 ft 3270 mm
Track Gauge	7.3 ft 2200 mm

Dimensions - Reach Boom - 5.7 m (18'8)

Transport Width - 790 mm (31 in) Shoes

9.1 ft 2990 mm

Dimensions - Reach Boom - 5.7 m (18'8)

Transport Width - 600 mm (24 in) Shoes

9.2 ft 2800 mm

Working Ranges & Forces

Maximum Digging Depth	21.1 ft 6430 mm
Boom	Reach 5.7 m (18'8") Reach 5.7 m (18'8")
Stick	Reach R2.7 m (8'10") Reach R2.7 m (8'10")
Bucket	GD 0.93 m³ (1.22 yd³) GD 0.93 m³ (1.22 yd³)
Maximum Reach at Ground Level	31.5 ft 9580 mm
Maximum Cutting Height	30.6 ft 9290 mm
Maximum Loading Height	21.1 ft 6450 mm
Minimum Loading Height	8.1 ft 2460 mm
Maximum Depth Cut for 2440 mm (8 ft) Level Bottom	20.6 ft 6250 mm
Maximum Vertical Wall Digging Depth	18.1 ft 5510 mm
Bucket Digging Force - ISO	30597 ft·lbf 136 kN
Stick Digging Force - ISO	23897 ft·lbf 106 kN

320 GX - Tier 3 Standard Equipment

NOTE

Standard and optional equipment may vary. Consult your Cat dealer for details.

BOOMS AND STICKS

5.7 m (18'8") Reach boom

CAB

Sound suppressed with viscous mounts

High-resolution 203 mm (8") LCD touch screen monitor

Mechanically adjustable seat with headrest and armrest

51 mm (2") orange seat belt

Auto bi-level air conditioner

Keyless push-to-start engine control

Fixed left-side console

1 button joysticks

Bluetooth® radio with USB/Aux ports

24V DC outlet

Cup holder and storage compartments

70/30 tempered glass windshield

Rear window emergency exit

Upper radial wiper with washer

Openable steel hatch

LED Dome light

Washable floor mat

CAT TECHNOLOGY

Cat Product Link™

ELECTRICAL SYSTEM

Maintenance-free 950 CCA batteries (x2)

Electrical disconnect switch

LED chassis and cab lights

LED left-side boom light

ENGINE

Cat C4.4 single turbo diesel engine

Two selectable modes: Power, Smart

Up to 4500 m (14,760 ft) altitude capability

52°C (125° F) high-ambient cooling capacity

-25°C (-13° F) cold start capability

Electric fuel priming pump

Two-stage fuel filtration system

Sealed double element air filter with integrated pre-cleaner

HYDRAULIC SYSTEM

Electronic main control valve, hammer ready

Back-to-back electronic pumps

Boom and stick regeneration circuits

Automatic hydraulic oil warmup

Automatic two-speed travel

High performance hydraulic return filter

SAFETY AND SECURITY

Anti-skid plating with countersunk bolts

Handrail and hand hold

Lockable external tool/storage box

Signaling/warning horn

Hydraulic lockout lever

SERVICE AND MAINTENANCE

Grouped engine oil and fuel filters

Sampling ports for Scheduled Oil Sampling (S·O·S)

UNDERCARRIAGE AND STRUCTURES

Grease lubricated track link

Center track guiding guard

Bottom guards

Travel motor guards

3600 kg (7,940 lb) counterweight

Tie-down points

320 GX - Tier 3 Optional Equipment

NOTE

Standard and optional equipment may vary. Consult your Cat dealer for details.

BOOMS AND STICKS

2.5 m (8'2") Reach stick

2.7 m (8'9") Reach stick

CAB

3 button joysticks

ELECTRICAL SYSTEM

LED right-side boom light

HYDRAULIC SYSTEM

Hammer lines

Hammer return filter

SAFETY AND SECURITY

FOGS with matching lights

Rearview camera

Rear- and right-side-view cameras (mandatory for Kingdom of Saudi Arabia; not available in other regions)

Rollover protective structure (ROPS) (mandatory for Kingdom of Saudi Arabia; optional in Africa, Middle East, South America; not available in other regions)

Travel alarm (standard in South America)

Swing alarm

Lockout device for disconnect switch (mandatory for Kingdom of Saudi Arabia; not available in other regions)

UNDERCARRIAGE AND STRUCTURES

600 mm (24") triple grouser track shoes

SERVICE AND MAINTENANCE

Radiator screen

790 mm (31") triple grouser track shoes

Compatible Technology and Services

Leverage Caterpillar connected data and security principles to improve efficiencies, increase productivity and make your business more profitable.

Equipment Management

Productivity

Cat Product Link

Cat® Product Link™ wirelessly connects you to your equipment giving you valuable insight into how your machine or fleet is performing. Information such as location, hours, fuel usage, productivity, idle time, and diagnostic codes are made available through online web applications so that you can make timely, fact-based decisions to maximize efficiency, improve productivity, and lower the cost of owning and operating your fleet. Available with satellite or cellular connectivity.

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VisionLink®

VisionLink® is a cloud-based software application that takes the guesswork out of fleet management with key insights to maximize performance - regardless of fleet size or equipment manufacturer. Receive equipment data seamlessly to your desktop or mobile device, all from a convenient centralized solution to make informed decisions at every turn.

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Cat® Product Link™ wirelessly connects you to your equipment giving you valuable insight into how your machine or fleet is performing. Information such as location, hours, fuel usage, productivity, idle time, and diagnostic codes are made available through online web applications so that you can make timely, fact-based decisions to maximize efficiency, improve productivity, and lower the cost of owning and operating your fleet. Available with satellite or cellular connectivity.

Explore Technology

VisionLink® is a cloud-based software application that takes the guesswork out of fleet management with key insights to maximize performance - regardless of fleet size or equipment manufacturer. Receive equipment data seamlessly to your desktop or mobile device, all from a convenient centralized solution to make informed decisions at every turn.

Explore Technology

VisionLink® Productivity

VisionLink® Productivity is an easy-to-use cloud-based platform that gathers and summarizes machine telematics and jobsite data from all your equipment. Actionable performance data is transmitted to the web platform for users to access anywhere, anytime via a mobile, tablet, or desktop device - on or off the jobsite.

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VisionLink® Productivity is an easy-to-use cloud-based platform that gathers and summarizes machine telematics and jobsite data from all your equipment. Actionable performance data is transmitted to the web platform for users to access anywhere, anytime via a mobile, tablet, or desktop device - on or off the jobsite.

Explore Technology