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320 GC Hydraulic Excavator

Net Power - ISO 9249

146 HP

Operating Weight

48500 lb

Maximum Digging Depth

22 ft


The Cat® 320 GC excavator balances productivity with easy-to-use technology features, a comfortable cab, reduced fuel consumption by up to 20%, and longer maintenance intervals reducing maintenance costs by up to 25% to bring you a durable, low-cost-per-hour excavator for light- to medium-duty applications.



  • 320 Family Introduction Video
  • Cat® Next Generation Excavators: Walkaround 320 Size Class
  • Cat® Next Generation Excavators: Vision
  • Cat® Next Generation Excavators: Manufacturing
  • Cat® Next Generation Excavators: Design
  • Stick Steer for Cat® Excavators

360° View


360° exterior view. Double click on the image to zoom in on any area of the product.


360° interior view. Double click on the image to zoom in on any area of the product.


Virtual Product Tour. Double click on the hotspots to see in on any area of the product.



  • Engine
    Spec Value
    Net Power - ISO 9249 146 HP
    Net Power - ISO 9249 (DIN) 148 hp (metric)
    Engine Model Cat C4.4
    Engine Power - ISO 14396 148 HP
    Engine Power - ISO 14396 (DIN) 150 hp (metric)
    Bore 4 in
    Stroke 5 in
    Displacement 269 in³
    Biodiesel Capability Up to B20¹
    Emissions Meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards
    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 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.
  • Hydraulic System
    Spec Value
    Main System - Maximum Flow 442 l/min (117 gal/min)
    Maximum Pressure - Equipment 5075 psi
    Maximum Pressure - Travel 4974 psi
    Maximum Pressure - Swing 3625 psi
  • Swing Mechanism
    Spec Value
    Swing Speed 11.6 r/min
    Maximum Swing Torque 54900 ft·lbf
  • Weights
    Spec Value
    Operating Weight 48500 lb
    Note Long undercarriage, Reach boom, R2.9 (9'6") stick, General Duty (GD) 1.0 m³ (1.31 yd³) bucket, 700 mm (28 in) triple grouser shoes and 4200 kg (9,300 lb) counterweight.
  • Service Refill Capacities
    Spec Value
    Fuel Tank Capacity 86.6 gal (US)
    Cooling System 6.6 gal (US)
    Engine Oil 4 gal (US)
    Swing Drive - Each 3.2 gal (US)
    Final Drive - Each 1.1 gal (US)
    Hydraulic System - Including Tank 61.8 gal (US)
    Hydraulic Tank 30.4 gal (US)
    DEF Tank 10.3 gal (US)
  • Dimensions
    Spec Value
    Boom Reach 5.7 m (18'8")
    Stick Reach 2.9 m (9'6")
    Bucket GD 1.0 m³ (1.31 yd³)
    Shipping Height - Top of Cab 9.7 ft
    Handrail Height 9.8 ft
    Shipping Length 31.3 ft
    Tail Swing Radius 9.3 ft
    Counterweight Clearance 3.4 ft
    Ground Clearance 1.5 ft
    Track Length 14.7 ft
    Length to Center of Rollers 11.11 ft
    Track Gauge 7.9 ft
    Transport Width 10.4 ft
  • Working Ranges & Forces
    Spec Value
    Maximum Digging Depth 22 ft
    Boom Reach 5.7 m (18.8)
    Stick Reach 2.9 m (9'6")
    Bucket GD 1.0 m³ (1.31 yd³)
    Maximum Reach at Ground Level 32.3 ft
    Maximum Cutting Height 31 ft
    Maximum Loading Height 21.3 ft
    Minimum Loading Height 7.1 ft
    Maximum Depth Cut for 2440 mm (8 ft) Level Bottom 21.6 ft
    Maximum Vertical Wall Digging Depth 18.7 ft
    Bucket Digging Force - ISO 28935 lbf
    Stick Digging Force - ISO 22281 lbf
  • Air Conditioning System
    Spec Value
    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).
  • Sustainability
    Spec Value
    Recyclability 97%

Standard Equipment


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


  • 5.7 m (18'8") Reach boom


  • Rollover protective structure (ROPS)
  • Mechanical-suspension seat
  • High-resolution 203 mm (8 inch) LCD touchscreen monitor


  • VisionLink®
  • Remote Flash


  • Two 1,000 CCA maintenance-free batteries
  • Centralized electrical disconnect switch
  • Programmable time-delay LED working lights
  • LED chassis light, boom lights, cab lights


  • Cat C4.4 single turbo engine
  • Two selectable power modes
  • Auto engine speed control
  • Auto engine idle shutdown
  • 52° C (125° F) high-ambient cooling capacity
  • -32° C (-25° F) cold start capability
  • Double element air filter with integrated pre-cleaner
  • Reversible electric cooling fans


  • Boom and stick regeneration circuits
  • Boom and stick lowering check valves
  • Auto warm up
  • Auto two-speed travel
  • Boom and stick drift reduction valve
  • Slider joysticks
  • Tool control (two pumps, one/two way high-pressure flow)


  • Auto hammer stop
  • Rearview and right-hand-sideview cameras
  • Ground-level engine shutoff switch
  • Lockable disconnect switch
  • Right-hand handrail and hand hold
  • Signaling/warning horn


  • Scheduled Oil Sampling (S·O·S℠) ports
  • Ground-level and platform-level engine oil dipsticks
  • Integrated vehicle health management system


  • Tie-down points on base frame
  • 3700 kg (8,160 lb) counterweight (Chile, Turkey only)
  • 4200 kg (9,300 lb) counterweight

Optional Equipment


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


  • 2.9 m (9'6") Reach stick
  • 2.5 m (8'2") Reach stick
  • 2.9 m (9'6") Reach Bare stick


  • VisionLink Productivity


  • SmartBoom™ (Europe only)


  • Swing alarm
  • Inspection lighting


  • 600 mm (24") triple grouser shoes
  • 700 mm (28") triple grouser shoes
  • 790 mm (31") triple grouser shoes
  • 900 mm (35") triple grouser shoes


  • Narrow (Europe only)