Cat® 320 Hydraulic Excavator

Excavation Performance That Delivers Results

The Cat® 320 Hydraulic Excavator, weighing up to 49,800 (20 tons), delivers productive performance for site prep, trenching, utility installation, excavation, and truck loading with integrated Cat Grade and Cat Payload technologies.

The Cat® 320 raises the bar with fuel-saving hydraulics, advanced technology, and an operator-focused cab, delivering lower fuel and maintenance costs and higher productivity for site prep, truck loading, trenching, and utility work.

Highlights
Videos
Features & Specs
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Equipment Highlights

Latest Features
        
  • The latest operator interface helps crews get to work faster with intuitive controls, customizable work tool settings, and quick access to machine information. Store couplers and attachments in the system, reduce calibration time, and simplify work tool changes to help maximize uptime and productivity.
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  • Cat Grade 3D Ready includes factory-installed and tested hardware for future Grade with 3D upgrades. Activate the system by purchasing the required software licenses through your Cat dealer, with remote or onsite installation available.
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  • Cat Payload* helps operators reach target loads and reduce overloading or underloading with real-time weighing. Upgrade to Advanced Payload for custom tags, daily production totals, and electronic ticketing. Connect with VisionLink™** to track production, monitor assets, and manage key jobsite metrics remotely.
*Payload technologies are not legal for trade.
**VisionLink subscription required. 

Not all features are available in all regions. Please check with your local Cat dealer for specific offering availability in your area. Build Number: 07H
Power Meets Efficiency
        
  • Integrated Cat technologies help optimize machine efficiency and lower operating costs.
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  • Smart Mode automatically adjusts power output to match jobsite demands.
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  • Advanced hydraulic systems deliver responsive performance and precise digging control.
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  • Low-emission engine technology meets Tier 4 Final and Stage V standards.
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  • Compatible with a wide range of Cat attachments for greater jobsite versatility.
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  • Advansys™ bucket tips help increase productivity and reduce service time.
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  • Designed to operate in extreme conditions with high-ambient capability up to 52°C (125°F) and cold-start capability down to -32°C (-25°F).
Technology That Helps Get More Done
        
  • Intuitive touchscreen controls help simplify machine setup, reduce downtime, and streamline work tool management.
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  • Quickly create and store work tool combinations, reducing setup time when changing attachments.
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  • Standard Cat® Grade with 2D helps operators achieve target grade faster with indicate-only and laser capability.
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  • Optional single-antenna Cat Grade with 3D provides visual and audible grade guidance to improve digging accuracy and productivity.
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  • Upgrade to dual-antenna GNSS for enhanced grade control, advanced positioning, cut-and-fill mapping, lane guidance, avoidance zones, and augmented reality capabilities.
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  • Create, edit, and manage grade designs directly from the in-cab touchscreen monitor.
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  • Cat Grade systems integrate with Trimble, Topcon, and Leica radios, base stations, and grade infrastructure.
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  • Cat Grade 3D Ready comes factory-equipped with installed and tested hardware for a simplified future Grade with 3D upgrade.
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  • Grade Assist helps maintain target grade with automated single-lever digging.
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  • Boom Assist helps keep the machine stable during lifting and demanding digging applications.
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  • Bucket Assist automatically maintains the desired bucket angle for grading, leveling, trenching, and slope work.
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  • Swing Assist automatically stops swing movement at preset points to help improve efficiency and reduce fuel consumption.
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  • Cat Payload delivers real-time onboard weighing to help operators hit target loads and improve loading efficiency.
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  • Advanced Payload adds custom tags, production totals, and electronic ticketing for enhanced jobsite reporting.
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  • Connect Payload with VisionLink™ to monitor production, track performance, and manage jobsite targets remotely.
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  • Optional Operator Coaching provides in-cab guidance to help improve operating techniques and reduce unnecessary machine wear.
Equipment Management Made Simpler
        
  • VisionLink™ helps monitor fleet health, utilization, maintenance, and production from virtually anywhere.
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  • Monitor machine location, operating hours, fuel levels, maintenance needs, fault codes, and equipment health from your desktop or mobile device.
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  • Cat Inspect streamlines inspections and preventive maintenance.
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  • Remote Troubleshoot helps diagnose machine issues faster.
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  • Remote Flash enables convenient software updates without onsite service.
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  • PL161 Attachment Locator tracks work tools across jobsites.
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  • Work tool recognition automatically adjusts machine settings for the selected attachment.
Operator Comfort Built In
        
  • Choose from multiple cab configurations to match your comfort and productivity needs.
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  • Spacious interior design provides more room to work comfortably.
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  • Adjustable seating supports operator comfort across long shifts.  Available heated and heated/cooled seat options.
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  • Available tip-up left console simplifies cab entry and exit.
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  • Easy-to-reach controls help reduce operator effort.
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  • Automatic climate control helps maintain a comfortable cab temperature throughout all seasons.
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  • Multiple storage areas keep essential items organized and accessible.
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  • Bluetooth® and USB connectivity help operators stay connected.
Engineered For Long-Term Reliability
        
  • Automatic hydraulic oil warm-up helps protect hydraulic components and improve cold-weather operation.
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  • Three-stage fuel filtration helps support fuel system reliability and engine durability.
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  • Heavy-duty guarding helps protect critical engine and hydraulic components.
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  • Durable hydraulic tank design helps withstand demanding operating conditions.
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  • Robust X-frame undercarriage helps handle demanding excavation applications.
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  • Protected hydraulic line routing helps reduce damage and service requirements.
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  • Sloped track frame design helps minimize debris buildup and support undercarriage life.
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  • Grease-lubricated tracks help reduce wear and extend service intervals.
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  • Sealed and rebuildable track rollers help extend undercarriage life in tough applications.
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  • Bolt-on track guiding guards help maintain alignment when working on slopes and uneven terrain.
Confidence Behind The Controls
        
  • Start the machine your way using push-button start, Bluetooth® key fob, or Operator ID.
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  • Personalized machine settings help operators get to work faster.
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  • Built-in grade offsets help improve grading accuracy and efficiency.
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  • Intuitive touchscreen controls simplify machine operation and setup.
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  • Auto Hammer Stop helps protect attachments and reduce maintenance needs.
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  • On-screen support tools help operators quickly access machine information.
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  • Integrated training resources help operators get more from machine technologies.
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  • Cat® PL161 Attachment Locator helps track work tools across jobsites and supports fleet and attachment management through VisionLink™.
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  • Automatic work tool recognition reduces setup time and helps optimize performance.
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  • Auto Dig Boost provides additional digging power when conditions demand it.
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  • Optional Stick Steer helps simplify machine travel and control.
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  • Auxiliary relay controls allow operators to activate machine accessories without removing their hands from the joysticks.
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  • Auto Heavy Lift delivers extra lifting force when handling heavy loads.
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  • Tiltrotator attachments integrate with Cat Grade, Assist, Payload, and E-Fence technologies to simplify setup and operation. grading, digging, and material handling tasks.
More Time Working. Less Time Servicing.
        
  • Extended maintenance intervals help lower maintenance costs and maximize uptime.
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  • Built-in machine health monitoring helps identify maintenance needs before they impact productivity.
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  • Ground-level access to daily maintenance points helps make inspections and routine service faster and safer.
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  • Reversing electric cooling fans help remove debris and simplify cooling system cleaning.
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  • High-capacity air filtration helps protect engine performance in dusty jobsite conditions.
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  • Advanced hydraulic oil filtration helps keep oil cleaner longer and supports extended service intervals.
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  • Cat fluids, filters, and S∙O∙S Services help keep machines working longer between service events.
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  • Easy-access sampling ports simplify fluid analysis and maintenance planning.
Designed For Safer Operation
        
  • Optional Cat Detect with People Detection helps improve operator awareness with visual and audible alerts.
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  • Optional Cat Command remote control operation helps keep operators away from hazardous work environments.
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  • 2D E-Fence helps maintain machine operation within predefined work areas.
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  • Ground-level service access helps simplify inspections and improve safety.
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  • ROPS cab design helps provide operator protection in demanding working environments. 
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  • Enhanced machine visibility helps operators monitor surroundings with confidence.
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  • Hydraulic lockout and ground-level shutdown controls help improve service safety.
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  • Standard rear and side-view cameras help improve visibility, with available 360° surround view for enhanced site awareness.
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  • Anti-slip service platforms and handrails simplify machine maintenance.
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  • Optional inspection lighting improves visibility when servicing the machine.
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  • Available swing alarms help improve awareness for personnel working nearby. 
Expand What Your Excavator Can Do
        
  • Buckets: Choose from digging, grading, cleanup, rock, and ditch-cleaning buckets designed to help maximize productivity across a wide range of excavation applications.
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  • Couplers (HEX): Change attachments quickly and securely from the cab to reduce downtime, improve efficiency, and increase machine versatility.
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  • Hammers: Break concrete, rock, and other tough materials with hydraulic hammers designed for demolition, quarry, and construction applications.
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  • Multi-Processors: Cut, crush, and process concrete, rebar, and steel with interchangeable jaw options that adapt to changing demolition demands.
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  • Demolition and Sorting Grapples: Handle, sort, and load demolition debris, scrap material, and recyclables with precision and control.
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  • Scrap and Demolition Shears: Cut steel structures, pipe, rebar, and scrap materials efficiently with powerful hydraulic shears built for demanding recycling and demolition work.
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  • Pulverizers: Crush concrete, separate rebar, and process demolition debris faster with high-performance pulverizers designed for primary and secondary demolition.
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  • Compactors (Vibratory Plate): Compact soil, sand, gravel, and asphalt to help create stable foundations, improve surface integrity, and support efficient trenching, roadwork, and repair applications.
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  • Rotary Cutters: Perform cutting, grinding, trenching, profiling, and demolition tasks with precision and control in challenging applications.
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  • Orange Peel Grapples: Load, sort, and handle scrap metal, waste, rock, and bulk materials with strong gripping force and continuous rotation capability.
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  • Thumbs: Improve material handling performance when lifting, sorting, placing, and loading rocks, logs, stumps, and construction debris.
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  • Tiltrotators: Gain 360-degree rotation and tilt functionality for greater attachment flexibility, increased precision, and improved productivity in grading, trenching, and utility work.

Cat® attachments are engineered to work as an integrated system with your excavator, helping maximize productivity, improve efficiency, and expand machine versatility across a wide range of applications. Contact your Cat dealer to identify the right attachment solution for your machine, jobsite, and operating requirements.
 
Productivity With Lower Environmental Impact
        
  • Cat C4.4 engine meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emissions standards.
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  • Lower CO₂ emissions than the previous 320F.
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  • Compatible with select renewable and lower-carbon fuels.
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  • Monitor emissions and fuel use with VisionLink™.
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  • Cat Grade helps reduce rework and fuel consumption.
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  • Auto idle control helps reduce fuel burn.
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  • Cat Payload improves loading efficiency.
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  • Extended service intervals reduce waste and downtime.
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  • Remote Flash updates software remotely.
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  • Operator training helps maximize machine productivity, support jobsite safety, and improve operating efficiency.

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Features + Specs

Equipment Features
Optional Equipment
Specs
  • Net Power - ISO 9249: 172 hp
  • Net Power - ISO 9249 (DIN): 175 hp (metric)
  • Engine Model: Cat® C4.4
  • Engine Power - ISO 14396: 174 hp
  • Engine Power - ISO 14396 (DIN): 176 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 2,200 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) and are compatible* with 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. *While Caterpillar engines are compatible with these alternative fuels, some regions may not allow their use. **Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels. ***Engines with no aftertreatment devices are compatible with higher blends, up to 100% biodiesel (for use of blends higher than 20% biodiesel, consult your Cat dealer).
  • Operating Weight: 49800 lb
  • Note: Reach boom, R2.9 (9'6") stick, Heavy Duty (HD) 1.19 m³ (1.56 yd³) bucket 790 mm (31") triple grouser shoes, 4200 kg (10,400 lb) counterweight.
  • Boom: Reach 5.7 m (18'8")
  • Stick: Reach 2.9 m (9'6")
  • Bucket: 1.19 m ³ (1.56 yd³)
  • Shipping Height - Top of Cab: 9.7 ft
  • Handrail Height: 9.7 ft
  • Shipping Length: 31.3 ft
  • Tail Swing Radius: 9.3 ft
  • Counterweight Clearance: 3.4 ft
  • Ground Clearance: 1.5 ft
  • Track Length: 14.6 ft
  • Length to Center of Rollers: 11.7 ft
  • Track Gauge: 7.8 ft
  • Transport Width: 9.8 ft
  • Recyclability: 97%
  • Swing Speed*: 11.25 r/min
  • Maximum Swing Torque: 60300 lbf·ft
  • Note (1): *For CE-marked machine default value may be set lower.
  • Main System - Maximum Flow: 429 l/min (113 gal/min)
  • Maximum Pressure - Equipment: 5075 psi
  • Maximum Pressure - Equipment - Lift Mode: 5510 psi
  • Maximum Pressure - Travel: 4974 psi
  • Maximum Pressure - Swing: 3988 psi
  • Air Conditioning: The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf. See the label or instruction manual for identification of the gas. If equipped with 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). If equipped with R1234yf (Global Warming Potential = 0.5), the system contains 0.75 kg (1.7 lb) of refrigerant which has a CO2 equivalent of 0.001 metric tonnes (0.001 tons).
  • Fuel Tank Capacity: 91.1 gal (US)
  • Cooling System: 6.6 gal (US)
  • Engine Oil: 4 gal (US)
  • Swing Drive: 1.6 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)
  • Maximum Digging Depth: 22 ft
  • Boom: Reach 5.7 m (18'8")
  • Stick: Reach 2.9 m (9'6")
  • Bucket: 1.19 m ³ (1.56 yd³)
  • Maximum Reach at Ground Level: 32.3 ft
  • Maximum Cutting Height: 30.7 ft
  • Maximum Loading Height: 21.3 ft
  • Minimum Loading Height: 7.1 ft
  • Maximum Depth Cut for 2440 mm (8 ft) Level Bottom: 21.5 ft
  • Maximum Vertical Wall Digging Depth: 17 ft
  • Bucket Digging Force - ISO: 31586 lbf
  • Stick Digging Force - ISO: 23987 lbf
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