323 – Tier 3

323 Hydraulic Excavator

The Cat® 323 delivers power, speed, and high production performance. With more standard technology than previous models, plus reduced fuel and maintenance costs, the Cat 323 has all you need to take your business to the next level.



  • Cab Monitor Improvements.

  1. Continuously improved user interface allows for intuitive navigation, minimizing performance interruption with the easy-to-use touchscreen menu.

  3. Identify apps quickly with a grid list view, abbreviated app names, and categorized menu options.

  5. A notification center keeps important information visible to the operator, and displays messages without shrinking the camera view.

  7. Color coded notifications set critical messages apart from the rest.

  9. Use the in-monitor QR code to learn about machine and technology features through a full suite of “how-to” videos.

  • Operator Coaching -Empower Operators. Exceed Targets.  

  1. Operator Coaching is an in-cab system that recognizes specific opportunities for operators to be more productive and prevent unnecessary machine wear and tear.  

  3. After detecting inefficient or restricted actions, the system alerts the operator and provides insight into the inefficiency and steps to improve. 

  5. Paired with a VisionLink® Productivity subscription, this information and other Operator Coaching insights can be viewed from anywhere.

Not all features are available in all regions. Please check with your local Cat dealer for specific offering availability in your area. Build Number: 07G



  • Use up to 15% less fuel than the Cat 323D2 excavator.

  • Increase operator efficiency by up to 45% with a suite of Cat technologies that lower operator fatigue and your operating costs, including fuel consumption and daily maintenance.

  • Match the excavator to the job using power modes; let Smart mode automatically match engine and hydraulic power to your working conditions.

  • The advanced hydraulic system provides the optimum balance of power and efficiency while giving you the control you need for precise digging requirements.

  • The electronically controlled, turbocharged engine can run on biodiesel up to B20 and meets Tier 3/Stage IIIA equivalent emission standards.

  • 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 has a standard high-ambient temperature capability of 52º C (125º F) and cold start capability of -18º C (0º F). An optional -32º C (-25º F) cold start package is available. 



  • Boost productivity up to 45% versus traditional grading with standard Cat Grade with 2D system – includes indicate-only and laser capability.

  • Cat Payload helps you achieve precise load targets to improve your operating efficiency. Pick up a load of material--with a bucket and thumb combination or grapple and clamshell attachments--and get a real-time weight estimate without swinging.

  • Combine Payload with VisionLink® and remotely manage your production targets.

  • Want a 3D system to improve your digging results? Caterpillar's single antenna global navigation satellite system (GNSS) makes it easy by giving you visual and auditory guidance to grade. Plus, you can create and edit designs on the touchscreen monitor while you’re on the job. If your application calls for a dual antenna system, it’s easy to upgrade.

  • Upgrade to our dual antenna GNSS for maximum grading efficiency. The system lets you create and edit designs on the touchscreen monitor while you’re on the job, or you can have the plan design sent to the excavator to make your work easier. Plus, you get added benefits of avoidance zones, cut and fill mapping, lane guidance, and augmented reality along with advanced positioning capability.

  • Already invested in another brand’s 3D system? No problem. Standard Cat technology like Grade with 2D can readily integrate with that system to give you the precise results you need.

  • Standard Grade Assist helps you 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 trenching applications.

  • Keep the tracks on ground in lifting and hard digging with Boom Assist.    

  • 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.

  • All Cat Grade systems are compatible with radios and base stations from Trimble, Topcon, and Leica. Already invested in a grade infrastructure? You can install grade systems from Trimble, Topcon, and Leica onto the machine.

  • Operator Coaching is an in-cab system that recognizes specific opportunities for operators to be more productive and prevent unnecessary machine wear and tear.  



  • VisionLink® provides actionable data insights for all assets - regardless of fleet size or equipment manufacturer.* Review equipment data from your desktop or mobile device to maximize uptime and optimize assets. Dashboards provide information such as hours, miles, location, idle time, and fuel utilization. Make informed decisions that lower costs, simplify maintenance, and improve safety and security on your jobsite.  

  • VisionLink Productivity gathers and summarizes machine telematics and jobsite data from all your equipment – regardless of the manufacture.* View actionable information such as idle time, fuel burn, location, payload, load counts, total cycles, and more to improve machine efficiency, productivity, and utilization. Access data anywhere via a mobile, tablet, or desktop device - on or off the jobsite.

  • Cat® Inspect is a mobile application that allows you to easily perform digital preventative maintenance (PM) checks, inspections, and daily walkarounds. Inspections can easily be integrated with other Cat data systems like VisionLink so you can keep a close eye on your fleet.

  • Remote Troubleshoot is a mobile application that allows your Cat dealer to perform diagnostic testing on your connected machine remotely to help ensure that issues are resolved quickly and with less downtime.

  • Remote Flash is a mobile application that allows you to update onboard software without a technician being present, allowing you to initiate software updates when convenient, increasing your overall operating efficiency.   

  • The Cat PL161 attachment locator allows you to track attachments across all worksites, reduce the number of lost attachments, and plan for attachment maintenance and replacement. The work tool recognition feature automatically adjusts machine settings based on the selected tool.

*Data field availability can vary by equipment manufacturer.




  • Two cab options – Comfort and Deluxe – let you choose the level of comfort you need.

  • Enjoy wide spacing between consoles for a more comfortable environment.

  • Sit in the lastest, wide seats that adjust for operators of all sizes (heated option available).

  • Get in and out of the cab easier using the tilt-up left console (in Deluxe cab only).

  • Control the excavator comfortably with easy-to-reach controls located in front of you.

  • Standard automatic climate control keeps you at the right temperature throughout your shift.

  • Improved viscous mounts reduce cab vibration by up to 50% over our previous excavator models.

  • 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 included.

  • The standard radio has USB ports and Bluetooth® technology enabled to connect your device and make hands-free calls.



  • Protect hydraulic components in cold weather. The auto warm-up feature speeds hydraulic oil warming in cooler temperatures.

  • The fuel system is protected from contamination of fuel by three levels of filtration.

  • Bottom guarding protects engine and hydraulic components from damage while swinging and traveling.

  • The hydraulic tank with an oval shape designed to improve stress resistance.

  • The strong X-structure lower frame carries loads from the excavator's upper structure to the track.

  • Travel motor hydraulic lines are routed inside of the frame to protect them from damage.

  • The sloped track frame design prevents mud and debris from accumulating and damaging tracks.

  • The grease lubricated tracks have grease sealed between the pin and bushing to prevent debris from entering and reducing life.

  • The track rollers are rebuild-able and sealed to prevent dirt and debris causing wear of internal components.

  • A bolt-on track guiding guard helps maintain track alignment while traveling or working on slopes.



  • Start the engine with the push of a button; use a Bluetooth key fob or Operator ID passcode.

  • Trouble cutting through tough material? Auto dig boost gives you an automatic power increase of 8% when you need it for better bucket penetration, shorter cycle times, and greater payloads.

  • Need more lift during your shift? Auto heavy lift gives you 8% more power exactly when you need it for as long as you need it.

  • 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.

  • Make operating easier with the touch of a joystick button. Additional auxiliary relays allow you to power on or turn off a CB radio, beacon light, and even a dust suppression watering system without taking your hands off the joysticks.

  • Navigate quickly on the high-resolution monitor.

  • Protect your hammer tool from overheating and rapid wear. Auto hammer stop warns you after 15 seconds of continuous firing and then automatically shuts it off after 30 seconds – all to extend the tool’s service life.

  • The Cat PL161 attachment locator is a Bluetooth device designed to let users know where their attachments are across all worksites, reduce the number of lost attachments, and plan for attachment maintenance and replacement. The PL161 integrates easily into VisionLink® for full fleet management of machines and attachments from one smartphone or tablet dashboard to view location and tracking details.

  • Save more time and energy with the available work tool recognition feature. A simple shake of the attached tool confirms its identity and ensures all the attachment settings (pressure, flow, and dimensions) are correct so you can work quickly and efficiently.

  • 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.



  • Extended maintenance intervals reduce maintenance costs by 20% over the 323D2 series excavator (savings calculated over 12,000 machine hours).

  • Boost productivity with proactive service reminders. The integrated vehicle health management system alerts the operator with step-by-step service guidance along with parts needed so you don't experience any unnecessary downtime.

  • Reversing electric cooling fans make it easy to clean radiator, oil coolers, and condensers.

  • The latest engine air cleaner with integrated pre-cleaner has twice the life of radial seal air cleaners.

  • The latest 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% longer than previous filter designs.

  • Track your excavator's filter life and maintenance intervals via the in-cab monitor.

  • Check engine oil level quickly and safely with the engine oil dipstick located on ground level.

  • S·O·SSM ports with extended sampling intervals are on ground level, simplifying maintenance and allows for quick easy extraction of samples for fluid analysis.

  • 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.



  • Cat Detect - People Detection helps protect the most valuable asset on any jobsite – people. The system uses smart cameras with depth sensors to provide the operator with visual and auditory alerts so he or she can take immediate action when a person is too close to the excavator.

  • Cat Command remote control enables equipment operators to work safely outside the machine when working in hazardous environments. Command offers the choice of handheld Consoles (line-of-sight) or long-distance virtual Stations (non-line-of-sight). Deep integration with machine systems enables efficiency and productivity by maintaining the use of in-cab technology* features (Grade, Payload, Assist, etc.).

  • 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.  

  • 2D E-Fence prevents the excavator from moving outside of operator-defined set points; the system works with thumb and bucket combinations along with hammer, grapple, and clamshell attachments.

  • Access 100% of daily maintenance points from ground level – no need for you to climb on top of the excavator.

  • Keep your excavator secure. Use your PIN code on the monitor or the Bluetooth key fobto 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 upgradable to an optional 360° visibility camera for visibility all around the excavator, allowing the operator to easily visualize objects and personnel around the excavator in a single view.

  • The 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 ISO2867 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.

  • Enhance jobsite safety. Add a swing alarm to alert people when you're rotating from trench to stockpile and back again.

* Not all technology features are available on the Command Console and vary by model. Consult your Cat dealer for details.

Standard Equipment

  • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Rollover protective structure (ROPS)
  • Mechanically adjustable seat (Comfort only)
  • Air-adjustable seat with heat (Deluxe only)
  • High-resolution 203 mm (8 inch) LCD touchscreen monitor
  • VisionLink®
  • Remote Flash
  • Remote Troubleshoot
  • Cat Grade 2D
  • Cat Assist
  • Cat Payload
  • Two 1,000 CCA maintenance-free batteries
  • Programmable time-delay LED working lights
  • LED chassis light, left and right hand boom lights for reach , cab lights-850 lumens
  • Cat 7.1 single turbo diesel engine
  • Automatic engine speed control
  • 52º C (125º F) high-ambient cooling capacity
  • -18° C (- 0° F) cold start capability
  • Double element air filter with integrated precleaner
  • Reversing electric cooling fans
  • Boom and stick regeneration circuits
  • Auto warm up
  • Auto two-speed travel
  • Auto dig boost
  • Boom and stick drift reduction valve
  • 2D E-Fence
  • Auto hammer stop
  • Rearview camera
  • Ground-level engine shutoff switch
  • Lockable disconnect switch
  • Right-hand handrail and handhold
  • Signaling/warning horn
  • Sampling ports for Scheduled Oil Sampling (S·O·S℠)
  • Ground-level and platform-level engine oil dipsticks
  • Integrated vehicle health management system
  • Tie-down points on base frame

Additional information

Offering Type

Engine - Net Power - ISO 9249

117 kW ( 157 HP )

Engine - Net Power - ISO 9249 (DIN)

159 hp (metric) ( 159 hp (metric) )

Engine Model

Cat C7.1

Engine Power - ISO 14396

118 kW ( 158 HP )

Engine Power - ISO 14396 (DIN)

160 hp (metric) ( 160 hp (metric) )

Engine - Bore

105 mm ( 4 in )

Engine - Stroke

135 mm ( 5 in )

Engine - Displacement

7.01 l ( 428 in³ )

Engine - Biodiesel Capability

Up to B20¹

Engine - Emissions

Meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA.

Hydraulic System - Main System - Maximum Flow

429 l/min (113 gal/min)

Hydraulic System - Maximum Pressure - Equipment

35000 kPa ( 5075 psi )

Hydraulic System - Maximum Pressure - Travel

34300 kPa ( 4974 psi )

Hydraulic System - Maximum Pressure - Swing

27500 kPa ( 3998 psi )

Swing Mechanism - Swing Speed

11.25 r/min ( 11.25 r/min )

Swing Mechanism - Maximum Swing Torque

82 kN·m ( 60300 lb/ft )

Weights - Operating Weight

22900 kg ( 50500 lb )

Service Refill Capacities - Fuel Tank Capacity

345 l ( 86.6 gal (US) )

Service Refill Capacities - Cooling System

25 l ( 6.6 gal (US) )

Service Refill Capacities - Engine Oil

25 l ( 6.6 gal (US) )

Service Refill Capacities - Swing Drive - Each

12 l ( 3.2 gal (US) )

Service Refill Capacities - Final Drive - Each

4 l ( 1.1 gal (US) )

Service Refill Capacities - Hydraulic System - Including Tank

234 l ( 61.8 gal (US) )

Service Refill Capacities - Hydraulic Tank

115 l ( 30.4 gal (US) )

Dimensions - Boom

HD Reach 5.7 m (18'8")

Dimensions - Stick

HD Reach 2.9 m (9'6")

Dimensions - Bucket

HD 1.30 m³ (1.70 yd³)

Dimensions - Shipping Height - Top of Cab

2960 mm ( 9.9 ft )

Dimensions - Handrail Height

2950 mm ( 9.8 ft )

Dimensions - Shipping Length

9530 mm ( 31.3 ft )

Dimensions - Tail Swing Radius

2830 mm ( 9.3 ft )

Dimensions - Counterweight Clearance

1050 mm ( 3.4 ft )

Dimensions - Ground Clearance

470 mm ( 1.7 ft )

Dimensions - Track Length

4450 mm ( 14.7 ft )

Dimensions - Length to Center of Rollers

3650 mm ( 12 ft )

Dimensions - Track Gauge

2380 mm ( 7.8 ft )

Dimensions - Transport Width

2980 mm ( 9.9 ft )

Working Ranges & Forces - Maximum Digging Depth

6730 mm ( 22.1 ft )

Working Ranges & Forces - Boom

HD Reach 5.7 m (18'8")

Working Ranges & Forces - Stick

HD Reach 2.9 m (9'6")

Working Ranges & Forces - Bucket

HD 1.30 m³ (1.70 yd³)

Working Ranges & Forces - Maximum Reach at Ground Level

9870 mm ( 32.4 ft )

Working Ranges & Forces - Maximum Cutting Height

9450 mm ( 31 ft )

Working Ranges & Forces - Maximum Loading Height

6480 mm ( 21.3 ft )

Working Ranges & Forces - Minimum Loading Height

2160 mm ( 7.1 ft )

Working Ranges & Forces - Maximum Depth Cut for 2440 mm (8 ft) Level Bottom

6560 mm ( 21.6 ft )

Working Ranges & Forces - Maximum Vertical Wall Digging Depth

5620 mm ( 18.5 ft )

Working Ranges & Forces - Bucket Digging Force - ISO

140 kN ( 31505 lbf )

Working Ranges & Forces - Stick Digging Force - ISO

107 kN ( 23962 lbf )

Weights - Note

Long undercarriage, Heavy Duty (HD) Reach boom, HD R2.9 (9'6") stick, 1.30 m³ (1.70 yd³) HD bucket, 600 mm (24") HD shoes, and 4200 kg (9,260 lb) counterweight.

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