320D/320D L (C6.6 Engine)

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The D Series incorporates many innovations for improved performance and versatility.


Engine Model Cat® C6.6 ACERT™ Cat® C6.6 ACERT™ Less
Net Flywheel Power 138.0 hp 103.0 kW Less
Bore 4.13 in 105.0 mm Less
Stroke 5.0 in 127.0 mm Less
Displacement 403.0 in3 6.6 L Less
Gross Power - SAE J1995 149.0 hp 111.0 kW Less
Net Power - SAE J1349/ISO 9249 138.0 hp 103.0 kW Less


Operating Weight 49869.0 lb 22620.0 kg Less
Operating Weight - Std. Undercarriage 46231.0 lb 20970.0 kg Less
Operating Weight - Long Undercarriage 48325.0 lb 21920.0 kg Less
Maximum Operating Weight 49869.0 lb 22620.0 kg Less
Minimum Operating Weight 46231.0 lb 20970.0 kg Less
Operating Weight - SLR Long Undercarriage 49869.0 lb 22620.0 kg Less

Service Refill Capacities

Fuel Tank Capacity 108.3 gal 410.0 L Less
Cooling System 7.7 gal 29.0 L Less
Engine Oil 5.8 gal 22.0 L Less
Swing Drive 2.1 gal 8.0 L Less
Final Drive (each) 2.1 gal 8.0 L Less
Hydraulic System (including tank) 68.7 gal 260.0 L Less
Hydraulic Tank 31.7 gal 120.0 L Less

Swing Mechanism

Swing Speed 11.5 RPM 11.5 RPM Less
Swing Torque 45729.0 lb ft 62.0 kN·m Less


Maximum Drawbar Pull 46311.0 lb 206.0 kN Less
Maximum Travel Speed 3.5 mph 5.6 km/h Less

Hydraulic System

Main Implement System - Maximum Flow (2x) 54.2 gal/min 205.0 L/min 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 5.6 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
Maximum Pressure - Equipment 5076.0 psi 35000.0 kPa Less
Maximum Pressure - Swing 3626.0 psi 25000.0 kPa Less
Maximum Pressure - Travel 5076.0 psi 35000.0 kPa Less

Sound Performance

Performance Performance Performance Less


Brakes ISO 10265 2008 ISO 10265 2008 Less


Clean, quiet operation and superior power with ACERT™ Technology


High efficiency and performance with low effort and precise control


Designed to handle the most rugged operating conditions while providing long life and value

Operator Station

Designed for comfortable, simple, and easy operation to allow the operator to focus on production

Booms and Sticks

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

Work Tools

An extensive selection to optimize machine performance

Service and Maintenance

Simplified service and maintenance features to save you time and money

Complete Customer Support

Cat dealer services to help you operate longer with lower costs

Cat® 320D Total Solutions

More than a piece of equipment - your livelihood

320D/320D L (C6.6 Engine) Standard Equipment

  • Electrical: • Alternator, 80 Amp • Light, storage box mounted (one) • Signaling/Warning horn • Starter Motor 8 kW

  • C6.6 with ACERT™ Technology
  • 3000 m altitude capability with no deration
  • 4 fuel filtrations (4 micron)
  • Glow plug
  • Automatic engine speed control with one touch low idle
  • High ambient cooling package
  • Radial seal air filter
  • Water separator in fuel line with 4 micron fuel filter with water level indicator
  • Waved fin radiator with space for cleaning
  • Auxiliary hydraulic valve (one)

  • Cab: • Adjustable armrest • Antenna and Harness (without radio speakers) • Ashtray and lighter • Beverage holder • Bi-Level air conditioner (automatic) with defroster • Capability of installing two additional pedals • Coat hook • Front windshield glass split 70/30 • Interior lighting • Control lever joysticks • Laminated front windshield and tempered other windows • Literature holder • Mounting for two stereo speakers (two locations) • Neutral lever (lock out) for all controls • Openable front windshield with assist device • Openable metal roof hatch • Pillar mounted upper windshield wiper and washer • Positive filtered ventilation • Pressurized cab (Positive filtered ventilation) • Radio mounting (DIN size) • Rear window, emergency exit • Removable lower windshield with in-cab storage bracket • Seat suspension, four way adjustable low back with integrated, adjustable console • Seat belt, retractable (two inch width) • Sliding upper door window • Start Switch Panel • Travel control pedals with removable hand levers • Utility space for magazine • Washable floor mat
  • Monitor: • Economy mode • Full time clock • Language display - Full color and graphical display • Machine condition, error code and tool mode setting • Start-up level check for hydraulic oil, engine oil and coolant • Warning information, filter/fluid change information and working hour

  • Automatic swing parking brake
  • Batteries (2 × 900 cca)
  • Boom drift reducing valve
  • Boom lowering device for back-up
  • Capability of stackable valves for main valve (maximum three valves)
  • Capability of auxiliary circuit (auxiliary pump and valves)
  • Capability of boom and stick lowering control device
  • Cat data link with capability of E.T.
  • Cat one key security system
  • Counterweight
  • Door locks and cap locks
  • Fixed type condenser core for air conditioning
  • Mirrors, rearview (frame-right, cab-left)
  • Product Link - 321
  • 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
  • Undercarriage: • Idler and center section track guiding • Towing eye on base frame

320D/320D L (C6.6 Engine) Optional Equipment

  • Bucket linkage, B1-family
  • Heavy-duty 5.7 m reach boom (with left side light)
  • Heavy-duty R2.9B1 stick for heavy-duty reach boom
  • Heavy-duty R2.5B1 stick for heavy-duty reach boom
  • Super long reach arrangement (only for 320D L)

  • 600 mm triple grouser shoes
  • 700 mm triple grouser shoes

  • Lift mode

  • Jump start receptacle
  • Starting kit, cold weather, additional 2 × batteries

  • Converter (2 sockets, max 10A)
  • Cab light