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The Cat® 320 excavator brings premium performance with simple-to-use technologies like Cat GRADE with 2D, Grade Assist, and Payload – all standard equipment from the factory to boost your operator efficiencies up to 45 percent. Combine these features with a new cab, longer maintenance intervals that lower your maintenance costs up to 15 percent, and a power system that reduces fuel consumption by up to 20 percent and you have a low-cost-per-unit-of-production excavator that’s perfect for medium- to heavy-duty applications.

Hydraulic System

Main System - Maximum Flow - Implement 113.0 gal/min 429.0 l/min Less
Maximum Pressure - Equipment 5075.0 psi 35000.0 kPa Less
Maximum Pressure - Equipment - Heavy Lift Mode 5510.0 psi 38000.0 kPa Less
Maximum Pressure - Travel 4974.0 psi 34300.0 kPa Less
Maximum Pressure - Swing 3886.0 psi 26800.0 kPa Less


Maximum Operating Weight 48500.0 lb 22000.0 kg Less
Note (1) 5.7 m (18'8") HD reach boom, 2.9 m (9'6") HD reach stick, HD 1.0 m3 (1.31 yd3 ) bucket, 600 mm (24") triple grouser shoes. 5.7 m (18'8") HD reach boom, 2.9 m (9'6") HD reach stick, HD 1.0 m3 (1.31 yd3 ) bucket, 600 mm (24") triple grouser shoes. Less

Service Refill Capacities

Fuel Tank Capacity 86.6 gal (US) 345.0 l Less
Cooling System 6.6 gal (US) 25.0 l Less
Engine Oil 6.6 gal (US) 25.0 l Less
Swing Drive - Each 1.3 gal (US) 5.0 l Less
Final Drive - Each 1.3 gal (US) 5.0 l Less
Hydraulic System - Including Tank 61.8 gal (US) 234.0 l Less
Hydraulic Tank 30.4 gal (US) 115.0 l Less

Dimensions - Reach Boom - 5.7 m (18'8

Length - Center of Rollers 12.0 ft 3650.0 mm Less

Working Ranges & Forces

Boom Reach 5.7 m (18'8") Reach 5.7 m (18'8") Less
Stick Reach 2.9 m (9'6") Reach 2.9 m (9'6") Less
Bucket 1.19 m3 (1.56 yd3) 1.19 m3 (1.56 yd3) Less
Maximum Digging Depth 22.0 ft 6720.0 mm Less
Maximum Reach at Ground Level 32.3 ft 9860.0 mm Less
Maximum Cutting Height 30.7 ft 9370.0 mm Less
Maximum Loading Height 21.3 ft 6490.0 mm Less
Minimum Loading Height 7.1 ft 2170.0 mm Less
Maximum Depth Cut for 2440 mm (8 ft) Level Bottom 21.5 ft 6550.0 mm Less
Maximum Vertical Wall Digging Depth 17.0 ft 5190.0 mm Less
Bucket Digging Force - ISO 33811.0 lbf 150.0 kN Less
Stick Digging Force - ISO 23911.0 lbf 106.0 kN Less
Bucket Digging Force - SAE 30104.0 lbf 134.0 kN Less
Stick Digging Force - SAE 23212.0 lbf 103.0 kN Less


Boom Reach 5.7 m (18'8") Reach 5.7 m (18'8") Less
Stick Reach 2.9 m (9'6") Reach 2.9 m (9'6") Less
Bucket 1.19 m3 (1.56 yd3) 1.19 m3 (1.56 yd3) Less
Shipping Height - Top of Cab 9.7 ft 2960.0 mm Less
Handrail Height 9.8 ft 2950.0 mm Less
Shipping Length 31.3 ft 9530.0 mm Less
Tail Swing Radius 9.3 ft 2830.0 mm Less
Ground Clearance 1.5 ft 470.0 mm Less
Track Gauge 7.8 ft 2380.0 mm Less
Transport Width 9.8 ft 2980.0 mm Less
Counterweight Clearance 3.4 ft 1050.0 mm Less
Track Length to Center of Rollers 12.0 ft 3650.0 mm Less


Engine Model Cat C7.1 ACERT Cat C7.1 ACERT Less
Engine Power - ISO 9249 157.0 HP 117.0 kW Less
Net Flywheel Power 117.0 kW 157.0 HP Less
Gross Power - ISO 14396/SAE J1995 118.0 HP 158.0 kW Less
Net Power - SAE J1349/ISO 9249 117.0 HP 157.0 kW Less
Engine RPM - Operation 1650.0 r/min 1650.0 r/min Less
Engine RPM - Travel 1800.0 r/min 1800.0 r/min Less
Bore 4.0 in 105.0 mm Less
Stroke 5.0 in 135.0 mm Less
Displacement 428.0 in³ 7.01 l Less
Engine Power - ISO 14396 158.0 HP 118.0 kW Less

Machine Weight

Note 5.7 m (18'8") HD reach boom, 2.9 m (9'6") HD reach stick, HD 1.0 m3 (1.31 yd3 ) bucket, 600 mm (24") triple grouser shoes. 5.7 m (18'8") HD reach boom, 2.9 m (9'6") HD reach stick, HD 1.0 m3 (1.31 yd3 ) bucket, 600 mm (24") triple grouser shoes. Less
Operating Weight 49.4 lb NaN kg Less

High Performance with Lower Fuel Consumption


  • Use up to 20 percentless fuel than the Cat 320D2 excavator.
  • Increase operating efficiency up to 45 percent with standard Cat Connect technologies that lower operator fatigue and your operating costs, including fuel consumption and daily maintenance.
  • The C7.1 ACERT™ engine can run on biodiesel up to B20 and meets U.S. EPA Tier 3/EU Stage IIIA/China Nonroad Stage III/Brazil Mar-1 equivalent emission standards.
  • The advanced hydraulic system provides the optimum balance of power and efficiency while giving you the control you need forprecise digging requirements.
  • Match the excavator to the job with power modes; let Smart mode automatically match engine and hydraulic power to your digging conditions.
  • Auxiliary hydraulic options give you the versatility to use a wide range of Cat attachments.
  • Don’t let the temperature stop you from working. The excavator hasa standard high-ambient temperature capability of 52° C (125°F) and cold start capability of –18° C (0° F). An optional –32°C(–25° F) cold start package isavailable.

Boost Efficiency and Boost Productivity with Integrated Cat Connect

  • Boost productivity up to 45 percent versus traditional grading with the standard Cat GRADE with 2D and Grade assist systems — includes indicate-only and laser capability.
  • Dig with real-time guidance on depth, slope, and horizontal distance to grade. You can set up to four different target depth and slope offsets to help save time and money. When the job calls for a different offset, quickly switch through the monitor and get to work.
  • The 2D system is upgradable to Cat GRADE with Advanced 2D orCat GRADE with 3D.
  • Standard Grade Assist:         
    • Stay on grade – simply and effortlessly – with single-lever digging.
    • Set your desired bucket angle and let Bucket Assist automatically maintain the angle in sloping, leveling, fine grading, and trenchig applications for easy, accurate, and fast jobs.
    • Keep the tracks on ground in lifting and hard digging with BoomAssist.
    • Automatically stop excavator swing at operator-defined set points in truck loading and trenching applications with Swing Assist, which will help you use less effort and consume less fuel.    
  • Standard Cat PAYLOAD on-board weighing system:     
    • Achieve precise load targets and increase loading efficiency with on-the-go weighing and real-time estimates of your payload without swinging.
    • Track your daily productivity such as truck target weights and load/cycle counts.
    • Calibration can be performed in a matter of minutes.
    • Combine Payload with VisionLink® and remotely manage your production targets.
  • Upgrade to optional Cat GRADE with 3D upgrade:     
    • Create and edit designs with ease and see the front linkage's full range of motion on a second high-resolution 254 mm (10 in) touchscreen monitor.
    • Know the excavator's exact position relative to GPS and GLONASS systems.
    • The machine automatically compensates for excavator pitch and roll caused by sloping ground conditions.
  • Standard Product Link™ provides location, machine hours, fuel usage, productivity, idle time, diagnostic codes, and other machine data on demand through VisionLink® online interface, helping you improve jobsite efficiency with lower operating costs.

Work in Comfort in the All-New Cab

  • Choose between Comfort and Deluxe cabs – both with automatic climate control.
  • Sit in wide seats that adjust for all size operators; stay warm with the Deluxe heated seat.
  • Enjoy wide spacing between consoles for a more comfortable environment.
  • Get in and out of the cab easier using the tip-up left console (inDeluxe cab only).
  • Advanced viscous mounts reduce cab vibration up to 50 percent over previous excavator models.
  • Control the excavator comfortably with easy-to-reach controls alllocated in front of you.
  • Stow your gear with plenty of in-cab storage behind and beneath the seat, overhead, and in the consoles. A cup holder, document holder, bottle holder, and coat hook are also provided.
  • Use the standard radio’s USB ports and Bluetooth® technology toconnect personal devices and make hands-free calls.

Simple to Operate

  • Start the engine with a push button; use a Bluetooth key fob, smartphone app, or the Operator ID passcode.
  • Program each joystick button, including response and pattern, using Operator ID; the machine will remember what you set eachtime you go to work.
  • Navigate quickly on the standard high-resolution 203 mm (8in) touchscreen monitor, or with the optional 254 mm (10 in) touchscreen monitor, or with the aid of the jog dial control.
  • A second 254 mm (10 in) monitor is available for the advanced gradecontrol.
  • 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.
  • Find the tool you need - even if it's hidden beneath overgrowth or debris. The excavator's onboard Bluetooth reader can search for any work tool equipped with Cat asset tracking devices up to a range of 60 meters (200 feet).


  • Expect up to 15 percent less maintenance cost than the 320D2. (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 thein-cab monitor.
  • Fuel filters are synchronized to be changed at 1,000 hours - double the interval from the previous filters.
  • Expect the new air intake filter with precleaner to last up to 1,000hours – a 100 percent increase over the previous filter.
  • The new hydraulic oil filter provides improved fi ltration performance, anti-drain valves to keep oil clean when the filter is replaced, and longer life with a 3,000 hour replacement interval – 50percent 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 are on ground level, simplifying maintenance and allowing for quick, easy extraction of fluid samples for analysis.


  • Lift Assist helps you avoid tipping. With visual and auditory alerts, you'll know if your load is within the excavator's safe working range limits.
  • The standard 2D E-fence feature integrated right out of the factory prevents the excavator from moving outside operator defined set points.
  • Access 100 percent of daily maintenance points from ground level – no need for you to climb on top of the excavator.
  • 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 pillars, larger windows, anda flat engine hood design.
  • The standard hydraulic lockout lever isolates all hydraulic and travel functions in the lowered position.
  • Ground-level shut-off switch stops all fuel to the engine when activated and shuts down the machine.
  • A rearview camera is standard. Upgrade to 360° visibility and you’lleasily see objects and personnel around the excavator inasingle view.
  • The new right-hand service platform design provides easy, safe, and quick access to upper service platform; the service platform steps use anti-skid punch plate to prevent slipping.
  • The handrails comply with ISO 2867:2011 requirements.

320 Standard Equipment

  • ROPS, standard sound suppression
  • Mechanically adjustable seat
  • High-resolution 203 mm (8 in) LCD touchscreen monitor

  • Cat Product Link
  • Cat GRADE with 2D
  • Cat GRADE with Assist

  • Three selectable power modes
  • One-touch low idle with auto engine speed control
  • Auto engine idle shutdown
  • 52°C (125°F) high-ambient cooling capacity
  • -18°C (0°F) cold start capability
  • Double element air fi lter with integrated precleaner
  • Reversing electric cooling fans
  • Biodiesel capability up to B20

  • Boom and stick regeneration circuits
  • Auto hydraulic warm up
  • Automatic two-speed travel
  • Boom and stick drift reduction valve
  • Slider joysticks

  • 5.7 m (18'8") HD reach boom, 2.9 m (9'6") HD reach stick

  • 600 mm (24") triple grouser shoes
  • Tie-down points on base frame
  • 3700 kg (8,157 lb) counterweight

  • Two 1,000 CCA maintenance-free batteries
  • Programmable time-delay LED working lights
  • LED chassis light, left-hand/right-hand boom lights, cab lights

  • Sampling ports for Scheduled Oil Sampling (S-O-S)
  • Ground-level and platform-level engine oil dipsticks
  • Remote flash

  • Rearview camera
  • Right-hand mirror
  • Ground-level engine shutoff switch
  • Right-hand handrail and hand hold
  • Signaling/warning horn

320 Optional Equipment

  • Air-adjustable seat with heat (Deluxe only)
  • High-resolution 254 mm (10 in) LCD touchscreen monitor

  • Cat GRADE with Advanced 2D (not available on SLR)
  • Cat GRADE with 3D (not available on SLR)

  • -32°C (-25°F) cold start capability

  • Hammer return filter circuit
  • Combined flow/high-pressure auxiliary circuit
  • Quick coupler circuit for Cat Pin Grabber

  • 8.85 m (29'0") SLR boom, 6.28 m (20'7") SLR stick

  • 600 mm (24") double grouser shoes
  • 4200 kg (9,300 lb) counterweight for HD base frame
  • 4700 kg (10,400 lb) counterweight for SLR boom and stick

  • Four 1,000 CCA maintenance-free batteries

  • 360° visibility