320 GC Hydraulic Excavator



Technical Specifications
Benefits and Features

The Cat® 320 GC excavator balances productivity with easy-to-use technology features, a new 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.

Net Power - ISO 9249 146 HP
Engine Model Cat C4.4e TA
Engine Power - ISO 14396 148 HP
Bore 4 in
Stroke 5 in
Displacement 269 in³
Operating Weight 48281 lb
Working Ranges & Forces
Maximum Digging Depth 22 ft
Boom Reach 5.7 m (18.8)
Stick R2.9B1 (9'6")
Bucket 1.00 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
Hydraulic System
Main System - Maximum Flow 442 l/min (116 gal/min)
Maximum Pressure - Equipment 5075 psi
Maximum Pressure - Travel 4974 psi
Maximum Pressure - Swing 3625 psi
Swing Mechanism
Swing Speed 11.6 r/min
Maximum Swing Torque 54900 ft·lbf
Service Refill Capacities
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)
Boom Reach 5.7 m (18'8")
Stick R2.9B1 (9'6")
Bucket 1.00 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 10.7 ft
Length to Center of Rollers 12 ft
Track Gauge 7.2 ft
Transport Width 10.4 ft


  • The excavator uses up to 20 percent less fuel than the 320F in similar applications.
  • Match the excavator to the job with power modes; let Smart mode automatically match engine and hydraulic power to digging conditions.
  • The advanced hydraulic system provides the optimum balance of power and efficiency while giving you the control you need for precise digging requirements.
  • Valve priority puts hydraulic pressure and flow where you command it to go for fast lightto medium load cycle times.
  • The engine meets U.S. EPA Tier 4 Final and EU Stage IV emission standards with an aftertreatment system that requires no operator input or downtime.
  • Add auxiliary hydraulics to do more work with a range of Cat attachments.
  • Product Link™ comes standard so you can remotely monitor machine health, location, hours, and fuel consumption on demand through the VisionLink® online interface.


  • Expect up to 25percent less maintenance cost than the 320E (savings calculated over 12,000 machine hours).
  • Do all daily maintenance at ground level.
  • Check engine oil level quickly and safely with the new ground level engine oil dipstick; fill and check engine oil on top of the machine with a conveniently located second dipstick.
  • Track your excavator’s filter life and maintenance intervals via the in-cab monitor.
  • No required maintenance on the Cat Clean Emissions Module.
  • Using Cat genuine oil and filters and doing your typical S∙O∙S monitoring will double the current service interval to 1,000 hours, giving you greater uptime to do more work.
  • The new 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 percent longer than previous filter designs.
  • The new high-efficiency electric cooling fans only run when needed and reverse to keep cores free from debris.
  • S·O·S ports simplify maintenance and allow for quick, easy extraction of samples for fluid analysis.


  • Work up to 3000 m (9,840 ft) above sea level without de-rating.
  • Standard high-ambient temperature capability is 52º C (125º F) with cold start capability at –32º C (–25º F).
  • Auto warm up speeds up hydraulic oil warming in cold temperatures and helps prolong the life of components.
  • Three levels of fuel filtration protect the engine from dirty diesel fuel.
  • Grease sealed between track pins and bushings reduces travel noise and prevents debris from entering to increase undercarriage life.
  • The center track guiding guard helps keep the excavator track aligned when traveling and working on slopes.
  • The sloped track frame prevents mud and debris accumulation, helping reduce risk of track damage.


  • Access 100 percent of daily maintenance points from ground level – no need for you to climb on top of the excavator.
  • Keep your excavator secure with Operator ID. Use your PIN code on the monitor to enable the pushbutton starting feature.
  • The standard ROPS cab meets ISO 12117-2:2008 requirements.
  • Enjoy great visibility into the trench, in each swing direction, and behind you with the help of smaller cab posts and larger windows.
  • A rearview camera is standard, and a right-side-view camera is optional.
  • The new right-hand service platform design provides easy, safe, and quick access to upper service platform; the service platformsteps use anti-skid punch plate to prevent slipping.
  • The handrails comply with ISO 2867:2011 requirements.
  • The lower frame meets ISO 15818:2017 lifting and tie-down requirements.
  • Make service work easier and safer with optional inspection lighting. With the flip of a switch, lights will illuminate the engine, pump, battery, and radiator compartments to enhance visibility.


  • Start the engine with a push button; use a Bluetooth key fob, or the unique Operator ID function.
  • Program each joystick button, including response and pattern, using Operator ID; it will also remember climate control fan and radio settings.
  • Navigate quickly on the standard high-resolution 203 mm (8 in) touchscreen monitor or with the aid of the jog dial control.
  • Protect your hammer from overworking. Auto hammer stop warns you after 15 seconds of continuous firing and then automatically shuts it off after 30 seconds -- all to prevent wear and tear on the attachment and excavator.
  • Not sure how a function works or how to maintain the excavator? Always have the operator’s manual at your fingertips in the touchscreen monitor.
  • The Cat PL161 Attachment Locator is a Bluetooth device that makes finding your attachments and other gear quick and easy. The Cat App on your phone will locate the device automatically.
  • Make moving the excavator much easier with Cat Stick Steer. Simply push a button and use one hand to travel and turn instead of both hands or feet on levers or pedals.


  • The Comfort cab has a wide seat that adjusts for operators of all sizes.
  • Control the excavator comfortably with easy-to-reach controls all located in front of you.
  • Standard automatic climate control keeps you at the righttemperature all shift long.
  • Advanced viscous mounts reduce cab vibration by up to 50 percent over previous excavator models.
  • Stow your gear with plenty of in-cab storage beneath and behind the seat, overhead, and in the consoles. A cup holder, documentholder, bottle holder, and coat hook are also provided.
  • Use the standard radio’s USB ports and Bluetooth® technology to connect to personal devices.

Standard Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Engine
    • Cat C4.4 electronically-controlled turbo-charged Tier 4 Final diesel engine
    • Meets U.S. EPA Tier 4 Final and EU Stage IV emissions standards.
    • Two selectable power modes
    • One-touch low idle with auto engine speed control
    • Auto engine idle shutdown
    • Recommended for use up to 4500 m altitude (14,764 ft) with engine power derate above 3000 m (9,842.5 ft).
    • 52° C (125° F) high-ambient cooling capacity
    • Cold starting capability for - 32° C (- 25° F)
    • Double element air filter with integrated pre-cleaner
    • Electric fuel priming pump
    • Reversible electric cooling fans
    • Biodiesel capability up to B20
  • Hydraulic System
    • Boom and stick regeneration circuits
    • Electronic main control valve
    • Auto warm up
    • Auto two-speed travel
    • Boom and stick drift reduction valve
    • Element type main hydraulic filter
    • 3 Buttons Joysticks
    • Electronic main pump
    • Electric refueling pump (Europe only)
  • Standard Comfort Cab
    • ROPS, standard sound suppression
    • High-resolution 8" (203 mm) LCD touchscreen monitor
    • Auto Bi-level air conditioner
    • Jog dial and shortcut keys for monitor control
    • Keyless push-to-start engine control
    • Height-adjustable console, 3-steps with tool
    • Mechanically adjustable seat suspension
    • Seat belt, retractable (51 mm [2"] width)
    • Fixed left side console
    • Bluetooth® integrated radio with USB ports
    • 12V DC outlets
    • Document storage
    • Cup and bottle holders
    • Two-piece front window, openable
    • Steel hatch, openable
    • Upper radial wiper with 70/30 w/washer
    • LED dome and lower interior lights
    • Roller front sunscreen
    • Beacon ready
    • Washable floor mat
    • Straight travel pedal (US Only)
  • Undercarriage And Structures
    • Tiedown points on base frame (ISO 15818 Compliant)
    • Bottom guards
    • Standard travel motor guards
    • Grease lubricated track links
    • 4200 kg (9,260lb) counterweight
    • Standard swing frame
    • Standard swing bearing
    • Base frame with standard track rollers and standard carrier rollers
    • Final drive with standard travel motor
    • 790 mm (31" ) triple grouser track shoes
  • Electrical
    • 1000 CCA maintenance-free batteries (x2)
    • Centralized electrical disconnect switch
    • Programmable time-delay LED working lights
    • LED chassis light, LH boom light for reach-850 lumens
  • Boom, Sticks And Linkages
    • 5.7 m (18'8") reach boom
    • 2.9 m (9'6") stick
    • 790 mm (31" ) triple grouser track shoes
    • Bucket linkage, B1-family with lifting eye
  • Safety & Security
    • Rearview camera and side right hand mirror
    • Rear and right-hand-sideview camera (Europe)
    • Neutral lever (lock out) for all controls
    • Anti-skid plate and countersunk bolts on service platform
    • Ground-level accessible secondary engine shutoff switch in cab
    • Right hand rail and hand hold (ISO 2867 compliant)
    • Travel alarm (US only)
  • Service & Maintenance
    • Sampling ports for Scheduled Oil Sampling (S·O·S℠)
    • Grouped location for engine oil and fuel filters
    • Ground-level 2nd dipstick for engine oil
    • Remote flash
  • Cat Technology
    • Cat Product Link
    • Auto hammer stop

Optional Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Cat Technology
    • Cat GRADE with Advanced 2D
  • Hydraulic System
    • Combined flow/high pressure aux circuit
    • Simplified combined circuit (2 Way)
    • Quick coupler circuit for Cat Pin Grabber
    • Slider joysticks
    • Smart boom (Europe only)
  • Electrical System
    • LED chassis light, left and right hand boom lights for reach, cab lights- 850 lumens
  • Standard Comfort Cab
    • Roller rear sunscreen
    • Cat Stick Steer
  • Service & Maintenance
    • Radiator screen
  • Safety & Security
    • Right hand side mirror for use with right-hand-sideview camera or 360° visibility (Europe)
    • Shovel crane package - optional Japan only
    • Inspection Lighting
  • Bucket
    • HD buckets 1.0m³ (1.31yd³)
  • Undercarriage And Structures
    • Long undercarriage
    • Long narrow undercarriage - optional Europe only