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The D Series incorporates innovations for improved performance and versatility.


Engine Model Cat® C6.4 ACERT™ Cat® 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 389.0 in3 6.4 L Less


Operating Weight 50706.0 lb 23000.0 kg Less
Operating Weight - Minimum 49163.0 lb 22300.0 kg Less
Operating Weight - Maximum 50926.0 lb 23100.0 kg Less

Service Refill Capacities

Fuel Tank Capacity 108.0 gal 410.0 L Less
Cooling System 6.6 gal 25.0 L Less
Engine Oil 8.0 gal 30.0 L Less
Swing Drive 2.1 gal 8.0 L Less
Final Drive (each) 2.6 gal 10.0 L Less
Hydraulic System (including tank) 69.0 gal 260.0 L Less
Hydraulic Tank 32.0 gal 120.0 L Less

Swing Mechanism

Swing Speed 11.5 RPM 11.5 RPM Less
Swing Torque 45600.0 lb ft 62.0 kN·m Less


Maximum Drawbar Pull 46310.0 lb 206.0 kN Less
Maximum Travel Speed 3.5 mph 5.7 km/h Less

Hydraulic System

Main Implement System - Maximum Flow (2x) 54.0 gal/min 205.0 L/min Less
Max. Pressure - Equipment 5076.0 psi 35000.0 kPa Less
Max. Pressure - Travel 5076.0 psi 35000.0 kPa Less
Max. Pressure - Swing 3626.0 psi 25000.0 kPa Less
Pilot System - Maximum Flow 8.6 gal/min 32.4 L/min Less
Pilot System - Maximum Pressure 566.0 psi 3900.0 kPa Less
Boom Cylinder - Bore 4.7 in 120.0 mm Less
Boom Cylinder - Stroke 49.6 in 1260.0 mm Less
Stick Cylinder - Bore 5.5 in 140.0 mm Less
B1 Family Bucket Cylinder - Bore 4.7 in 120.0 mm Less
Stick Cylinder - Stroke 59.2 in 1504.0 mm Less
B1 Family Bucket Cylinder - Stroke 43.5 in 1104.0 mm Less

Sound Performance

Performance ANSI/SAE J1166 OCT 98 ANSI/SAE J1166 OCT 98 Less


Brakes SAE J1026 APR90 SAE J1026 APR90 Less
Cab/FOGS SAE J1356 FEB88 SAE J1356 FEB88 Less

Engine and Hydraulics

The Cat® 323D L delivers the power and control that you need in order to get the job done quickly and efficiently in all applications.

Component Layout

The 323D L hydraulic system and component locations are designed to provide a high level of system efficiency. The main pumps, control valves and hydraulic tank are located close together to allow for shorter tubes and lines between components to reduce friction loss and pressure drops. The layout further provides greater operator comfort by placing the radiator on the cab side of the upper structure. This allows incoming air to enter the engine compartment from the operator side and hot air and corresponding engine sound to exit on the opposite side away from the operator. This reduces engine compartment heat and sound being transmitted to the operator.

Pilot System

The pilot pump is independent from the main pumps and controls the front linkage, swing and travel operations.

Hydraulic Cross Sensing System

The hydraulic cross sensing system utilizes each of two hydraulic pumps to 100 percent of engine power, under all operating conditions. This improves productivity with faster implement speeds and quicker, stronger pivot turns.

Auxiliary Hydraulic Valve

The auxiliary valve is standard on the 323D L. Control Circuits are available as attachments, allowing for operation of high and medium pressure tools such as shears, grapples, hammers, pulverizers, multi-processors and vibratory plate compactors.

Boom and Stick Regeneration Circuit

Boom and stick regeneration circuit saves energy during boom-down and stick-in operation which increases efficiency, reduces cycle times and pressure loss for higher productivity, lower operating costs and increased fuel efficiency.

Hydraulic Cylinder Snubbers

Snubbers are located at the rod-end of the boom cylinders and both ends of the stick cylinders to cushion shocks while reducing sound levels and extending component life.

Operator Station

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


Pillar-mounted wipers increase the operator’s viewing area and offer continuous and intermittent modes.


Caterpillar® excavators are designed to handle the most rugged operating conditions while providing long life and value.

Booms and Sticks

Designed-in flexibility to help bring higher production and efficiency to all jobs.

Work Tools - Attachments

The 323D L has an extensive selection of work tools to optimize machine performance.

Service and Maintenance

Simplified service and maintenance features save you time and money.

Complete Customer Support

Cat dealer services help you operate longer with lower costs.

Cat® 323D L Total Solutions

Your excavator is more than a piece of equipment; it's your livelihood.

323D L Standard Equipment

Upper Structure
  • Electrical
  • Engine
  • Auxiliary hydraulic valve (one)
  • Automatic swing parking brake
  • Boom drift reducing valve
  • Boom lowering device for back-up
  • Capability of stackable valves for main valve (maximum three valves)
  • Capability of auxiliary circuit (aux. pump and valves)
  • Capability of boom and stick lowering control device
  • Cat data link with capability of E.T.
  • Cat product link ready
  • Caterpillar one key security system
  • Counterweight
  • Door locks and cap locks
  • Fixed type condenser core for air conditioning
  • GPS ready function
  • Mirrors, rearview (frame-right, cab-left)
  • Regeneration circuit for boom and stick
  • Reverse swing damping valve
  • Secondary engine shutoff switch
  • Steel wall between engine and pump compartment
  • Stick drift reducing valve
  • Straight travel hydraulic circuit
  • Two speed travel

  • Idler and center section track guiding
  • Towing eye on baseframe

Operator Station
  • Cab
  • Monitor

323D L Optional Equipment

Front linkage
  • Bucket linkage, B1-family with lifting eye
  • Heavy-duty 5.7 m (18 ft 9 in) reach boom (with left side light)
  • Heavy-duty R2.9B1 (9 ft 6 in) stick for heavy-duty reach boom
  • Heavy-duty R2.5B1 (8 ft 2 in) stick for heavy-duty reach boom
  • Super Long Reach Arr. (Only for 320DL)

  • General Purpose 0.9 m3
  • General Purpose 1.0 m3
  • Heavy Duty 1.0 m3
  • Heavy Duty 1.2 m3 (requires Heavy-duty R2.5B1 stick)
  • Heavy Duty Rock 1.0 m3
  • General Purpose 0.4 m3 for Super long reach arrangement
  • Ditch Cleaning 0.6 m3 for Super long reach arrangement

Bucket Attachments
  • Tips, Side cutters and Side protectors

  • 600 mm (24 in) triple grouser shoes
  • 800 mm (32 in) triple grouser shoes

Operator Station
  • FM/AM radio (without cassette)
  • Head Rest

Air conditioner condenser, swing type

Pump, Electric Refueling, with automatic shutoff

Starting kit, cold weather, -32 C deg.

Auxiliary Hydraulics and lines
  • Boom and stick lines
  • Tool control system

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