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320 Hydraulic Excavator

320 Hydraulic Excavator

Moving the Standard Higher

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More Comfort – More Performance – More Versatility

  • Use Less Fuel

    A precise combination of lower engine speed and a large hydraulic pump delivers top performance while burning less fuel than the previous 320F.

  • Low Maintenance Costs

    With extended and more synchronized maintenance intervals, you get more done at a lower cost compared to the previous 320F.

  • More Operating Efficiency

    Offering the industry’s highest level of standard factory-equipped technology, including Cat Grade with 2D, Grade with Assist and Payload.

  • Up To 25% Less CO2 Emissions

    The 320 emits up to 25% less CO2 than the previous 320F.


Biodiesel Capability Up to B20¹
Bore 4 in
Displacement 269 in³
Emissions Meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards.
Engine Model Cat C4.4
Engine Power - ISO 14396 174 HP
Engine Power - ISO 14396 (DIN) 176 hp (metric)
Net Power - ISO 9249 172 HP
Net Power - ISO 9249 (DIN) 175 hp (metric)
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 2,200 rpm. Advertised power is tested per the specified standard in effect at the time of manufacture.
Note (2) ¹Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels** up to: 20% 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. *Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel (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.
Stroke 5 in

Hydraulic System

Main System - Maximum Flow 429 l/min (113 gal/min)
Maximum Pressure - Equipment 5075 psi
Maximum Pressure - Swing 3988 psi
Maximum Pressure - Travel 4974 psi

Swing Mechanism

Maximum Swing Torque 60300 ft·lbf


Note Reach boom, R2.9 (9'6") stick, Heavy Duty (HD) 1.19 m ³ (1.56 yd³) bucket 790 mm (31") triple grouser shoes, 4200 kg (10,400 lb) counterweight.
Operating Weight 49800 lb

Service Refill Capacities

Cooling System 6.6 gal (US)
DEF Tank 10.3 gal (US)
Engine Oil 4 gal (US)
Final Drive - Each 1.1 gal (US)
Fuel Tank Capacity 86.6 gal (US)
Hydraulic System - Including Tank 61.8 gal (US)
Hydraulic Tank 30.4 gal (US)
Swing Drive - Each 1.6 gal (US)


Boom Reach 5.7 m (18'8")
Bucket 1.19 m ³ (1.56 yd³)
Counterweight Clearance 3.4 ft
Ground Clearance 1.5 ft
Handrail Height 9.7 ft
Length to Center of Rollers 11.7 ft
Shipping Height - Top of Cab 9.7 ft
Shipping Length 31.3 ft
Stick Reach 2.9 m (9'6")
Tail Swing Radius 9.3 ft
Track Gauge 7.8 ft
Track Length 14.6 ft
Transport Width 9.8 ft

Working Ranges & Forces

Boom Reach 5.7 m (18'8")
Bucket 1.19 m ³ (1.56 yd³)
Bucket Digging Force - ISO 38811 lbf
Maximum Cutting Height 30.7 ft
Maximum Depth Cut for 2440 mm (8 ft) Level Bottom 21.5 ft
Maximum Digging Depth 22 ft
Maximum Loading Height 21.3 ft
Maximum Reach at Ground Level 32.3 ft
Maximum Vertical Wall Digging Depth 17 ft
Minimum Loading Height 7.1 ft
Stick Reach 2.9 m (9'6")
Stick Digging Force - ISO 23911 lbf

Air Conditioning System

Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 0.85 kg (1.9 lb) of refrigerant which has a CO2 equivalent of 1.216 metric tonnes (1.340 tons).


Recyclability 97%

Download resources

320 Excavator - Product Brochure (Aus-NZ, Chile, Colombia, Europe, N Am, Turkey)
320 Excavator - Technical Specifications (N Am)
320 Excavator - Technical Specifications (Aus-NZ)
320 Excavator - Technical Specifications (Europe)
320 Excavator - Technical Specifications (Chile, Colombia, Turkey)
Super Long Reach and Long Reach Excavation - Product Brochure (Europe, N Am)

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