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The D Series incorporates innovations for improved performance, controllability and versatility.


Engine Model C6.4 ACERT C6.4 ACERT Less
Net Flywheel Power 150.0 hp 110.0 kW Less
Net Power - ISO 9249 150.0 hp 110.0 kW Less
Bore 4.02 in 102.0 mm Less
Stroke 5.12 in 130.0 mm Less
Displacement 390.55 in3 6.4 L Less
Net Power - EEC 80/1269 147.51 hp 110.0 kW Less


Operating Weight 50706.0 lb 23000.0 kg Less
Operating Weight - Minimum 50706.0 lb 23000.0 kg Less
Operating Weight - Maximum 52910.0 lb 24000.0 kg Less

Service Refill Capacities

Fuel Tank Capacity 108.31 gal 410.0 L Less
Cooling System 6.6 gal 25.0 L Less
Swing Drive 2.11 gal 8.0 L Less
Final Drive (each) 2.11 gal 8.0 L Less
Hydraulic System (including tank) 68.68 gal 260.0 L Less
Hydraulic Tank 31.7 gal 120.0 L Less

Swing Mechanism

Swing Torque 45728.85 lb ft 62.0 kN·m Less


Maximum Drawbar Pull 46310.63 lb 206.0 kN Less
Maximum Travel Speed 3.42 mph 5.5 km/h Less

Hydraulic System

Main Implement System - Maximum Flow (2x) 54.16 gal/min 205.0 L/min Less
Pilot System - Maximum Flow 8.45 gal/min 32.0 L/min Less
Boom Cylinder - Bore 4.72 in 120.0 mm Less
Boom Cylinder - Stroke 49.61 in 1260.0 mm Less
Stick Cylinder - Bore 5.51 in 140.0 mm Less
B1 Family Bucket Cylinder - Bore 4.72 in 120.0 mm Less
B1 Family Bucket Cylinder - Stroke 43.46 in 1104.0 mm Less
CB2 Family Bucket Cylinder - Bore 5.31 in 135.0 mm Less
CB2 Family Bucket Cylinder - Stroke 45.51 in 1156.0 mm Less

Sound Performance

Performance ANSI/SAE J1166 APR 90 ANSI/SAE J1166 APR 90 Less


Shipping length 395.47 in 10045.0 mm Less
Transport width 117.32 in 2980.0 mm Less
Shipping Height 10.4 ft 3170.0 mm Less
Counterweight clearance 40.16 in 1020.0 mm Less


The Cat C6.4 gives the 323D exceptional power and fuel efficiency unmatched in the industry for consistently high performance in all applications.

Environmentally Responsible Design

Cat machines not only help you build a better world, they help maintain and preserve the fragile environment.


Cat hydraulics deliver power and precise control to keep material moving.

Operator Comfort

Designed for simple, easy operation and comfort, the 323D allows the operator to focus on production.


323D structural components and undercarriage are the backbone of the machine's durability.

Booms, Sticks and Linkage

Designed for flexibility, high productivity and efficiency in a variety of applications.

Work Tools

A wide variety of Work Tools help optimize machine performance. Purpose designed and built to Caterpillar’s high durability standards.

Versatility - Electronic Control System

Manages the engine and hydraulics for maximum performance and safety.

Service and Maintenance

Simplfied service and maintenance save you time and money.

Complete Customer Support

Cat dealer services help you operate longer with lower costs.

323D L Standard Equipment

  • 50 Ampere alternator
  • Base machine light (frame)
  • Heavy-duty maintenance free batteries (2)
  • Jump start terminals
  • Lights
  • Signal/Warning horn
  • Travel alarm with cutout switch

  • Automatic engine speed control
  • C6.4 with ACERT™ Technology
  • 52° cooling capacity
  • Engine air pre-filter
  • Fine swing control
  • Fuel filter
  • Secondary engine shut-off switch
  • Side-by-side cooling system with separately mounted AC condenser
  • Water separator, with level indicator, for fuel line

  • 6 mm swivel guard on undercarriage
  • Heavy-duty botom guards on upper frame
  • Heavy-duty travel motor guards on undercarriage
  • Full length track guiding guards

Operator Station
  • 2 - 12V, 7A power supply ports
  • Adjustable armrests
  • Air conditioner, heater, defroster with automatic climate control
  • AM/FM Radio
  • Ashtray with 24 volt lighter
  • Beverage/cup holder
  • Capability to install two additional pedals
  • Coat hook
  • Floor mat, washable
  • Instrument panel and gauges with full color graphical display, start-up level checks
  • Laminated front windshield
  • Literature compartment
  • Mirrors - left and right
  • Neutral lever (lock out) for all controls
  • Opening skylight (polycarbonate)
  • Positive filtered ventilation, pressurized cab
  • Rear window, secondary exit
  • Retractable seat belt
  • Sliding upper door window
  • Storage compartment suitable for lunch box cooler
  • Travel control pedals with removable hand levers
  • Upper windshield wiper and washer

  • Automatic swing parking brake
  • Automatic travel parking brakes
  • Grease lubricated track
  • Hydraulic track adjusters
  • Steps - four
  • Two speed travel

Other Standard Equipment
  • Auxiliary hydraulic valve for hydro-mechincal tools
  • Cat branded XT hoses and fix-type couplings
  • Cat Datalink and capability to use ET
  • Caterpillar one key security system with locks for doors, cab and fuel cap
  • Caterpillar Product Link 321
  • Couterweight with lifting eyes
  • Cross-roller type swing bearing
  • Drive for auxiliary pump
  • Full-steel firewall between engine and hydraulic pump compartment
  • Heavy lift mode
  • Regeneration circuit for boom and stick
  • S•O•SSM quick sampling valves for engine, hydraulic oil and coolant
  • Swing out A/C condenser
  • Vehicle gradability 35°

323D L Optional Equipment

Auxiliary Hydraulics
  • Auxiliary boom lines (high pressure for reach and mass booms)
  • Auxiliary boom lines for quick coupler
  • Auxiliary stick lines (high pressure for reach and mass booms)
  • Auxiliary stick lines for quick coupler
  • Basic control arrangements:
  • Hammer return filter circuit
  • High pressure control group for quick coupler

Front Linkage
  • Booms (with two working lights)
  • Bucket Linkage
  • Buckets and quick coupler
  • Sidebar protectors
  • Sidecutters
  • Strike-off sidecutters
  • Sticks, heavy-duty
  • Tips

  • Falling Object Guarding System (FOGS), bolt-on
  • Cab, front windshield screen (for hammer use)
  • Bucket cylinder guard
  • Upper frame side, rubber bumper

Operator Compartment
  • Machine Security System with programmable keys
  • Visor, sun

  • Triple grouser

Miscellaneous Options
  • Cab, front rain protector
  • Cab, sun visor
  • Cold weather starting package
  • Electric refueling pump with auto shut-off
  • Fine filtration filter
  • Light, right side boom
  • Quick coupler, pin grabber hydraulically actuated
  • Spare bucket pins
  • Straight travel pedal
  • Work lights, cab mounted