320 GX - Tier 3
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
Net Power - ISO 9249 (DIN)
141 hp (metric)
Engine Model
Cat C4.4
DOWNLOAD TECHNICAL SPECIFICATIONS
Specification
Value
Net Power - ISO 9249
139 HP
Net Power - ISO 9249 (DIN)
141 hp (metric)
Engine Model
Cat C4.4
Engine Power - ISO 14396
145 HP
Engine Power - ISO 14396 (DIN)
147 hp (metric)
Bore
4 in
Stroke
5 in
Displacement
269 in³
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.
Specification
Value
Main System - Maximum Flow - Implement
113.4 gal/min
Maximum Pressure - Equipment
5075 psi
Maximum Pressure - Travel
5075 psi
Maximum Pressure - Swing
3626 psi
Specification
Value
Swing Speed
11.07 r/min
Maximum Swing Torque
54875 ft·lbf
Specification
Value
Operating Weight
45300 lb
Note
Reach boom, R2.7 (8'9") stick, General Duty (GD) 0.93 m³ (1.22 yd³) bucket, 790 mm (31") triple grouser shoes, and 3600 kg (7,940 lb) counterweight.
Specification
Value
Fuel Tank Capacity
103 gal (US)
Cooling System
6.5 gal (US)
Engine Oil
4 gal (US)
Swing Drive
1.5 gal (US)
Final Drive - Each
1.2 gal (US)
Hydraulic System - Including Tank
57.6 gal (US)
Hydraulic Tank
30.4 gal (US)
Specification
Value
Boom
Reach 5.7 m (18'8")
Stick
Reach 2.7 m (8'10")
Bucket
GD 0.93 m³ (1.22 yd³)
Shipping Height - Top of Cab
9.9 ft
Handrail Height
9.11 ft
Shipping Length
31.5 ft
Tail Swing Radius
9.3 ft
Counterweight Clearance
3.5 ft
Ground Clearance
1.6 ft
Track Length
13.5 ft
Track Length to Center of Rollers
10.9 ft
Track Gauge
7.3 ft
Transport Width
9.9 ft
Specification
Value
Maximum Digging Depth
21.1 ft
Boom
Reach 5.7 m (18'8")
Stick
Reach 2.7 m (8'10")
Bucket
GD 0.93 m³ (1.22 yd³)
Maximum Reach at Ground Level
31.5 ft
Maximum Cutting Height
30.6 ft
Maximum Loading Height
21.1 ft
Minimum Loading Height
8.1 ft
Maximum Depth Cut for 2440 mm (8 ft) Level Bottom
20.6 ft
Maximum Vertical Wall Digging Depth
18.1 ft
Bucket Digging Force - ISO
30597 ft·lbf
Stick Digging Force - ISO
23897 ft·lbf
Cab Monitor Improvements 
        
  • Continuously improved user interface allows for intuitive navigation, minimizing performance interruption with the easy-to-use touchscreen menu.
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  • 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.
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  • Color coded notifications set critical messages apart from the rest.
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  • 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
        
  • The machine’s electrohydraulic system allows accurate bucket control for maximum precision.
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  • Start the engine with a push button.
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  • Navigate quickly on the high-resolution 203 mm (8 in) touchscreen monitor
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  • Control the excavator comfortably with easy-to-reach controls all located in front of you.
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  • Program your preferences for power mode, joystick pattern, and joystick response using Operator ID. The excavator will automatically remember your selections.
        
  • 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).
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  • 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.
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  • Fuel filters are synchronized to be changed at 1,000 hours – double the interval from the previous filters.
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  • The hydraulic oil filter provides improved filtration performance, anti-drain valves to keep oil clean when the filter is
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  • 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.
        
  • The excavator uses up to 15% less fuel than the 320D2 GC in similar applications.
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  • 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.
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  • Save fuel with Automatic Engine Control (AEC). It reduces engine speed when the machine is not under load to minimize fuel consumption.
        
  • 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).
        
  • The cab has a wide seat that adjusts to suit individual operator preferences.
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  • Standard automatic climate control helps keep you comfortable all shift long.
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  • Excellent work site visibility from the cab enhances productivity and safety.
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  • Optimized low-effort joystick controls reduce operator fatigue.
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  • 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.
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  • Use the radio’s Bluetooth® technology to make hands-free calls.
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  • 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.
        
  • 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.
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  • 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.
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  • Enjoy great visibility into the trench, in each swing direction, and behind you with the help of smaller cab posts and larger windows.
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  • An optional rearview camera enhances visibility.
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  • Anti-skid plating on the service platform helps prevent slipping.
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  • The handrails meet ISO 2867:2011 requirements for added safety.
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  • Keep your excavator secure with Operator ID. Use your PIN code on the monitor to enable the push button starting feature.
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  • Enhance jobsite safety. Add a swing alarm to alert people when you're rotating from trench to stockpile and back again.