312D L

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3.59% P.A. OVER 60 MONTHS Competitive Finance
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Achieve high productivity and lower operating costs with the Cat® 312D Hydraulic Excavator. Unmatched versatility, improved controllability, easy operation and a comfortable, redesigned operator station help make the 312D an industry-leading performer.


Engine Model Cat® C4.2 ACERT™ Cat® C4.2 ACERT™ Less
Flywheel Power 89.9 HP 67.0 kW Less
Gross Power 96.6 HP 72.0 kW Less
Bore 4.02 in 102.0 mm Less
Stroke 5.12 in 130.0 mm Less
Displacement 259.35 in³ 4.25 l Less
Net Power 89.9 HP 67.0 kW Less
Net Power - SAE J1349 89.9 HP 67.0 kW Less


Operating Weight 30093.0 lb 13650.0 kg Less
Operating Weight - Long Undercarriage 30093.0 lb 13650.0 kg Less

Swing Mechanism

Swing Speed 12.4 r/min 12.4 r/min Less
Swing Torque 22828.0 ft-lb 30950.0 N·m Less


Maximum Drawbar Pull 25628.0 lb 114.0 kN Less
Travel Speed 3.4 mile/h 5.5 km/h Less

Hydraulic System

Main Implement System - Maximum Flow (2x) 33.6 gal/min 127.0 l/min Less
Maximum Pressure - Implements 4424.0 psi 30500.0 kPa Less
Maximum Pressure - Travel 5076.0 psi 35000.0 kPa Less
Maximum Pressure - Swing 3336.0 psi 23000.0 kPa Less
Pilot System - Maximum Flow 9.5 gal/min 36.0 l/min Less
Pilot System - Maximum Pressure 598.0 psi 4120.0 kPa Less
Boom Cylinder - Bore 4.33 in 110.0 mm Less
Boom Cylinder - Stroke 39.96 in 1015.0 mm Less
Stick Cylinder - Bore 4.72 in 120.0 mm Less
Stick Cylinder - Stroke 47.13 in 1197.0 mm Less
Bucket Cylinder - Bore 3.94 in 100.0 mm Less
Bucket Cylinder - Stroke 36.97 in 939.0 mm Less

Service Refill Capacities

Fuel Tank 66.0 gal (US) 250.0 l Less
Cooling System 4.7 gal (US) 17.9 l Less
Engine Oil 5.2 gal (US) 19.5 l Less
Final Drive - Each 0.79 gal (US) 3.0 l Less
Hydraulic System - Including Tank 42.8 gal (US) 162.0 l Less
Hydraulic Tank 39.6 gal (US) 150.0 l Less
Swing Drive 0.79 gal (US) 3.0 l Less


Cab/FOGS SAE J1356 FEB88 ISO 10262 SAE J1356 FEB88 ISO 10262 Less
Cab - ROPS ISO 12117-2:2008 ISO 12117-2:2008 Less

Sound Performance

Performance Performance Performance Less



Electronic Control Systems

Operator Station






Customer Support

312D L Standard Equipment

  • Auxiliary boom lines (high pressure)
  • Auxiliary stick lines (high pressure)
  • Basic control arrangements:
  • High pressure control group for center-lock quick coupler
  • Cooling circuit for auxiliary hydraulics
  • Universal control group for quick coupler
  • Hammer return filter circuit

  • Alarm, travel
  • Alternator, 50 A
  • Cat® battery
  • Circuit breaker
  • Warning horn (front)
  • Water level indicator
  • Working light, boom (right side)
  • Working light, storage box mounted
  • Working lights, cab mounted
  • Rearview camera

  • Cat® C4.2 diesel engine with ACERT™ Technology, Altitude capability to 2300 m
  • 52° C cooling capability
  • Air inlet heater for low ambient starting
  • Automatic engine speed control with push button return to idle
  • 24V electric starting
  • Cat® Extended Life Coolant
  • Radial seal air filters with double element, integrated cyclonic
  • Water separator in fuel line
  • Secondary engine shut-off switch
  • Fuel economy mode
  • Fuel filter, 2 micron
  • Radiator, waved fin with side-by-side type oil cooler

  • Boom (with two working lights), Reach 4650 mm
  • Boom lowering check valve
  • Bucket linkage, B linkage with lifting eye
  • Stick, 2500 mm
  • Stick lowering check valve

  • Guard, bottom
  • Guards, track motor
  • Guard, swivel

  • Adjustable armrests
  • Air conditioner, heater and defroster with automatic climate control
  • Ashtray and 24V lighter
  • Beverage cup holder
  • Bolt-on FOGS capability
  • Converters, 7A/12V (2)
  • Floor mat, washable
  • Instrument panel and gauges with full color graphical display, start-up level checks
  • Joysticks (2) thumb wheel
  • Laminated front windshield
  • Literature compartment
  • Lunch box storage with lid
  • Mirrors, left and right
  • Neutral lever (lock-out) for all controls
  • Radial windshield wiper and washer (upper and lower)
  • Positive filtered ventilation, pressurized cab
  • Rear window, emergency exit
  • Retractable seat belt
  • ROPS cab
  • Seat, adjustable, high back, heated with air suspension
  • Sliding upper door window
  • Stationary skylight (polycarbonate)
  • Storage compartment suitable for a lunch box
  • Sunscreen for windshield and skylight
  • Travel control pedals with removable hand levers
  • Windshield 70-30 split, sliding

  • Shoes, triple grouser, 500 mm

  • Automatic swing parking brake
  • Automatic travel parking brakes
  • Grease lubricated tracks
  • Hydraulic track adjusters
  • Idler and center section track guiding guards
  • Two-speed travel

  • Boom and stick drift reducing valve
  • Boom and stick regeneration circuit
  • Counterweight, 2450 kg
  • Cat® one key security system with locks for doors, cab and fuel cap
  • Cat® Data Link and capability for Cat Electronic Technician
  • Full-steel firewall between engine and hydraulic pump compartment
  • Mirrors (frame right, cab left)
  • Precleaner
  • Product Link 321
  • Reverse swing damping valve
  • Separate hydraulic filter with reusable metal tube for filter element – no drop oil filter
  • S·O·SSM quick sampling valves for engine oil, hydraulic oil and coolant

312D L Optional Equipment

Stick and boom configurations
  • • 3.0 m stick
  • • 2.8 m stick
  • • 2.5 m stick

Optimise Jobsite Efficiency with Cat® Machine and Technology Solutions

Talk to your Cat dealer about the range of innovative machine technology and fleet management solutions including GRADE, PAYLOAD and LINK technologies. Our 3-year Equipment Protection Plan is now standard on many models* and Caterpillar is standing behind fuel efficiency with our Fuel Edge Program. Plus your Cat dealer can offer competitive finance rates with Caterpillar Financial Australia. 

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