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320 GX - Tier 3 Medium Excavators

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.

320 GX - Tier 3

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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.

Net Power - ISO 9249
139 hp
Operating Weight
45300 lb
Maximum Digging Depth
21.1 ft
Net Power - ISO 9249 (DIN)
141 hp (metric)
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  • Specifications
  • Features
  • Standard Equipment

Specifications

Engine specifications
Net Power - ISO 9249 103.6 kW
Net Power - ISO 9249 (DIN) 141 hp (metric)
Engine Model Cat C4.4
Engine Power - ISO 14396 108 kW
Engine Power - ISO 14396 (DIN) 147 hp (metric)
Bore 105 mm
Stroke 127 mm
Displacement 4.4 l
Biodiesel Capability Up to B20¹
Emissions Emits equivalent to U.S. EPA Tier 3 and EU Stage IIIA.
Note (1) Net power advertised is the power available at the flywheel when the engine is equipped with fan, air intake system, exhaust system and alternator with engine speed at 2,000 rpm. Advertised power is tested per the specified standard in effect at the time of manufacture.
Note (2) ¹Cat engines are compatible with diesel fuel blended with the following lower-carbon intensity fuels** up to: 100% biodiesel FAME (fatty acid methyl ester)* or 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details. *For use of blends higher than 20% biodiesel, consult your Cat dealer. **Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels.

Features

Latest Features

Cab Monitor Improvements 
        
  • Continuously improved user interface allows for intuitive navigation, minimizing performance interruption with the easy-to-use touchscreen menu.
    •     
  • Identify apps quickly with a grid list view, abbreviated app names, and categorized menu options.
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  • A notification center keeps important information visible to the operator, and displays messages without shrinking the camera view.
    •     
  • Color coded notifications set critical messages apart from the rest.
    •     
  • Use the in-monitor QR code to learn about machine and technology features through a full suite of “how-to” videos.

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

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.
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  • Up to 20% 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% longer than previous filter designs.
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  • Grease sealed between track pins and bushings reduces travel noise and prevents debris from entering to help increase undercarriage life.
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  • Auto warm up speeds up hydraulic oil warming in cold temperatures and helps prolong the life of components.
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  • 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.
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  • S·O·SSM 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% 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.
    •     
  • 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.
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  • Booms and sticks are robotically welded and checked ultrasonically to ensure maximum durability.
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  • Reliable and durable and built on classic, proven components.
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  • The Cat C4.4 engine and electrohydraulic system work in sync to help you move plenty of material while using less fuel.
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  • Fast cycle times give you excellent productivity.
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  • A hammer-ready valve is standard for added versatility.
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  • Two levels of fuel filtration protect the engine from contaminated diesel fuel.
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  • Cat undercarriage is built strong to absorb jobsite stresses for enhanced performance and durability.
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  • General duty buckets are designed for fast material discharge and cleaning.
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  • Work up to 4500 m (14,760 ft) above sea level with engine power derate above 3000 m (9,840 ft).
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  • Standard high-ambient temperature capability is 52°C (125°F) with cold start capability at -25°C (-13°F).

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
CAT TECHNOLOGY
  • VisionLink®
  • Capability to Remote Flash Cat Product Link™ (telematics only)
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
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
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
  • Scheduled Oil Sampling (S·O·S℠) ports
UNDERCARRIAGE AND STRUCTURES
  • Grease lubricated track link
  • Center track guiding guard
  • Bottom guards
  • Travel motor guards
  • 3600 kg (7,940 lb) counterweight

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

CAT TECHNOLOGY

  • VisionLink Productivity

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)

SERVICE AND MAINTENANCE

  • Radiator screen

UNDERCARRIAGE AND STRUCTURES

  • 600 mm (24") triple grouser track shoes
  • 790 mm (31") triple grouser track shoes