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The Cat® 323 combines speed, efficiency, and power. Standard technology right from the factory help boost operator efficiency by up to 45%. Combine these features with a new cab, longer maintenance intervals and reduced fuel consumption to lower maintenance costs by up to 15% and fuel consumption by up to 20 percent.


Engine Power - ISO 9249 157.0 HP 117.0 kW Less
Engine Model Cat C7.1 Cat C7.1 Less
Engine Power - ISO 14396 158.0 HP 118.0 kW 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

Hydraulic System

Main System - Maximum Flow 429 l/min (113 gal/min) 429 l/min (113 gal/min) Less
Maximum Pressure - Equipment 5075.0 psi 35000.0 kPa Less
Maximum Pressure - Travel 4974.0 psi 34300.0 kPa Less
Maximum Pressure - Swing 3886.0 psi 26800.0 kPa Less

Swing Mechanism

Swing Speed 11.25 r/min 11.25 r/min Less
Maximum Swing Torque 54440.0 lb/ft 74.0 kN·m Less


Operating Weight 54000.0 lb 24500.0 kg 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


Boom Reach 5.7 m (18'8") Reach 5.7 m (18'8") Less
Stick Reach R2.9B1 (9'6") Reach R2.9B1 (9'6") Less
Bucket HD 1.30 m³ (1.70 yd³) HD 1.30 m³ (1.70 yd³) Less
Shipping Height - Top of Cab 9.9 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
Counterweight Clearance 3.4 ft 1050.0 mm Less
Ground Clearance 1.7 ft 470.0 mm Less
Length to Center of Rollers 12.0 ft 3650.0 mm Less
Track Gauge 7.8 ft 2380.0 mm Less
Transport Width 9.9 ft 2980.0 mm Less

Working Ranges & Forces

Maximum Digging Depth 22.1 ft 6730.0 mm Less
Boom Reach 5.7 m (18'8") Reach 5.7 m (18'8") Less
Stick Reach R2.9B1 (9'6") Reach R2.9B1 (9'6") Less
Bucket HD 1.30 m³ (1.70 yd³) HD 1.30 m³ (1.70 yd³) Less
Maximum Reach at Ground Level 32.4 ft 9870.0 mm Less
Maximum Cutting Height 31.0 ft 9450.0 mm Less
Maximum Loading Height 21.3 ft 6480.0 mm Less
Minimum Loading Height 7.1 ft 2160.0 mm Less
Maximum Depth Cut for 2440 mm (8 ft) Level Bottom 21.6 ft 6560.0 mm Less
Maximum Vertical Wall Digging Depth 18.8 ft 5740.0 mm Less
Bucket Digging Force - ISO 31505.0 lbf 140.0 kN Less
Stick Digging Force - ISO 23962.0 lbf 107.0 kN Less


  • Use up to 15% less fuel than the Cat 323D2 excavator.
  • Increase operator efficiency by up to 45% with a suite of Cat technologies and 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% vs traditional grading with the standard Cat GRADE with 2D system– includes indicate-only and laser capability.
  • Dig with real-time guidance on depth, slope, and horizontal distance to grade.
  • The 2D system is upgradable to Cat GRADE with Advanced 2D or Cat GRADE with 3D.
  • Standard Grade Assist -
  1. Stay on grade - simply and effortlessly -with single-lever digging.
  2. Set your desired bucket angle and let Bucket Assist automatically maintain the angle in sloping, leveling, fine grading, and trenching applications for easy, accurate, and fast jobs.
  3. Keep your tracks on the 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.
  • Standard Cat PAYLOAD on-board weighing system -
  1. Achieve precise load targets and increase loading efficiency with on-the-go weighing and real-time estimates of your payload without swinging.
  2. Track your daily productivity such as truck target weights and load/cycle counts.
  3. Calibration can be performed in a matter of minutes.
  4. Combine Payload with VisionLink® and remotely manage your production targets.
  • Upgrade to optional Cat GRADE with Advanced 2D -
  1. Create and edit grade designs with ease on a second high-resolution 10 in (254 mm) touchscreen monitor.
  • Upgrade to optional Cat GRADE with 3D -
  1. Create and edit designs with ease and see the front linkage's full range of motion on a second high-resolution 10 in (254 mm) touchscreen monitor.
  2. Know the excavator's exact position relative to GPS and GLONASS systems.
  3. 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.


  • 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 new, wide seats that adjust for operators of all sizes (heated option available).
  • Get in and out of the cab easier using the tip-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 a new oval shape is 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 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.


  • You can navigate quickly on the standard high-resolution 203 mm (8 in) touchscreen monitor, or with the optional 254 mm (8 in) touchscreen monitor, or with the aid of the jog dial control.
  • A second 254 mm (10 in) monitor is available for the advanced grade control.
  • Start the engine with a push button; use a Bluetooth key fob, smartphone app, or the unique Operator ID function.
  • Match the excavator's operation to your digging style by adjusting the joystick response and programming the function of each joystick button.


  • Extended maintenance intervals reduce maintenance costs by 15% over the 323D2 series excavator. (15% savings calculated over 12, 000 machine hours.)
  • Reversing electric cooling fans make it easy to clean radiator, oil coolers, and condensers.
  • An all-new engine air cleaner with integrated pre-cleaner has twice the life of radial seal air cleaners.
  • 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% 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 new engine oil dipstick located on ground level.
  • S·O·S ports with extended sampling intervals are on ground level, simplifying maintenance and allows for quick easy extraction of samples for fluid analysis.


  • Work safely under structures or near traffic with the standard 2D E-fence feature integrated right out of the factory, which prevents any part of the excavator from moving outside operator-defined set points to avoid hazards and jobsite accidents.
  • 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, the Bluetooth key fob, or your smartphone 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 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 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 ISO2867 requirements.

323 Standard Equipment

  • Cat GRADE with 2D (Not available on SLR)
  • Cat Assist (Boom Assist, Bucket Assist, Swing Assist, Grade Assist)
  • Cat Payload (Payload Information, Static Weigh, Auto-Calibration)
  • 2D E-fence
  • Cat Product Link™

  • Cat C7.1 electronically controlled turbo-charged diesel engine
  • Meets worldwide Tier 3/stage IIIA equivalent emission standards
  • Three selectable power modes
  • One-touch low idle with automatic engine speed control
  • Automatic engine idle shutdown
  • Recommended for use up to 4500 m (14,764 ft) altitude with engine power de-rate above 3000 m (9,842.5 ft).
  • 52º C (125º F) high-ambient cooling capacity
  • Cold starting capability for -18° C (- 0° F)
  • Double element air filter with integrated pre-cleaner
  • Electric fuel priming pump
  • Reversible electric cooling fans
  • Biodiesel capability up to B20

  • Boom and stick regeneration circuits
  • Electronic main control valve
  • Auto hydraulic warm up
  • Automatic two-speed travel
  • Boom and stick drift reduction valve
  • Element type main hydraulic filter
  • Slider joysticks
  • Electronic main pump

  • ROPS, standard sound suppression
  • High-resolution 8" (203 mm) LCD touchscreen monitor
  • Automatic bi-level air conditioner
  • Jog dial and shortcut keys for monitor control
  • Keyless push-to-start engine control
  • Height-adjustable console, inifinite with no tool
  • Mechanically adjustable seat suspension
  • Seat belt, retractable (51 mm [2"] width)
  • Fixed up left side console
  • Bluetooth® integrated radio with USB ports
  • 12V DC outlets (x2)
  • Document storage
  • Cup and bottle holders
  • Two-piece front window, openable
  • Upper radial wiper w/washer
  • LED dome and lower interior lights
  • Roller front sunscreen
  • Beacon ready
  • Washable floor mat
  • Polycarbonate skylight hatch, openable

  • Tie-down points on base frame (ISO 15818 compliant)
  • Segmented track guiding guards
  • Standard bottom guards
  • Standard travel motor guards
  • Grease lubricated track links
  • 5400 kg (11,900 lb) counterweight
  • HD swing frame
  • HD swing bearing
  • HD base frame with SD track rollers and standard carrier rollers
  • Final drive with standard travel motor

  • 5.7 m (18'8") HD reach boom
  • 2.9 m (9'6") HD stick
  • 600 mm (24") triple grouser track shoes
  • Bucket linkage, B1 family with lifting eye

  • Machine electronic control module (x2)
  • 1000 CCA maintenance-free batteries (x2)
  • Centralized electrical disconnect switch
  • Programmable time-delay LED working lights
  • LED chassis light, LH & RH boom lights for reach , cab lights-850 lumens

  • Rearview camera and side RH mirror
  • 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
  • Bluetooth® Receiver
  • RH hand rail and hand hold (ISO 2867 compliant)

  • 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

323 Optional Equipment

  • Cat GRADE with Advanced 2D
  • Cat GRADE with 3D

  • Cold starting capability for - 32° C (- 25° F)

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

  • Heavy-duty bottom guard
  • Standard swivel guard
  • Heavy-duty travel motor guards
  • 4200 kg (9,260 lb) counterweight
  • Semi-HD swing frame
  • Semi-HD swing bearing
  • SD base frame with SD track rollers and SD carrier rollers

  • 600mm (24") double grouser track shoes
  • 700 mm (28") triple grouser track shoes
  • 790 mm (31") triple grouser track shoes
  • 5.7 m (18'8") HD reach boom
  • 2.5 m (8'2") HD stick
  • Bucket linkage, B1 family without lifting eye

  • 1000 CCA Maintenance-free batteries (x4) for cold starting capability -32°C

  • Preventative maintenance ready (Quick Evac)

  • 360° visibility
  • Radiator screen
  • Rearview and RH sideview camera
  • Travel alarm

  • High-resolution 8" (203 mm) LCD touchscreen monitor + additional monitor (Only for use with Cat GRADE with Advanced 2D or Cat GRADE with 3D).
  • High resolution 10" (254 mm) LCD touch screen monitor (Only for use with 360° Visibility).
  • High resolution 10" (254 mm) LCD touch screen monitor + additional monitor (Only for use with 360° Visibility and Cat GRADE with Advanced 2D or Cat GRADE with 3D).
  • Roller rear sunscreen
  • Rain protector and cab light covers (Only for use with 360° Visibility.).
  • Air-adjustable seat suspension
  • Tilt-up left side console

  • General duty buckets 1.14 m3 (1.49 yd3)
  • Heavy duty buckets from 1.3 m3 (1.71 yd3) to1.38 m3 (1.81 yd3)
  • Sever duty buckets 1.19 m3 (1.56 yd3)