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The 340 can be built to meet your special needs like digging dirt, moving rock, or shaping distant slopes and ditches. Packed with technologies and operator enhancements, this 40-ton excavator will help you get more of that work done quickly and efficiently.


Engine Power - ISO 9249 311.0 HP 232.0 kW Less
Engine Model Cat C9.3B Cat C9.3B Less
Engine Power - ISO 14396 314.0 HP 234.0 kW Less
Bore 5.0 in 115.0 mm Less
Stroke 6.0 in 149.0 mm Less
Displacement 568.0 in³ 9.3 l Less

Hydraulic System

Main System - Maximum Flow 558 l/min (147 gal/min) 558 l/min (147 gal/min) Less
Maximum Pressure - Equipment 5076.0 psi 35000.0 kPa Less
Maximum Pressure - Equipment - Lift Mode 5511.0 psi 38000.0 kPa Less
Maximum Pressure - Travel 5076.0 psi 35000.0 kPa Less
Maximum Pressure - Swing 4264.0 psi 29400.0 kPa Less

Swing Mechanism

Swing Speed 8.75 r/min 8.75 r/min Less
Maximum Swing Torque 106228.0 ft·lbf 144.0 kN·m Less


Operating Weight 87000.0 lb 39700.0 kg Less

Service Refill Capacities

Fuel Tank Capacity 158.5 gal (US) 600.0 l Less
Cooling System 10.5 gal (US) 40.0 l Less
Engine Oil 8.5 gal (US) 32.0 l Less
Swing Drive 4.8 gal (US) 18.0 l Less
Final Drive - Each 2.1 gal (US) 8.0 l Less
Hydraulic System - Including Tank 98.5 gal (US) 373.0 l Less
Hydraulic Tank 42.5 gal (US) 161.0 l Less
DEF Tank 21.1 gal (US) 80.0 l Less


Boom Reach 6.5 m (21'4") Reach 6.5 m (21'4") Less
Stick Reach R3.2DB (10'6") Reach R3.2DB (10'6") Less
Bucket GD 2.27 m³ (2.97 yd³) GD 2.27 m³ (2.97 yd³) Less
Shipping Height - Top of Cab 11.2 ft 3400.0 mm Less
Handrail Height 11.1 ft 3390.0 mm Less
Shipping Length 36.5 ft 10110.0 mm Less
Tail Swing Radius 11.6 ft 3530.0 mm Less
Counterweight Clearance 4.8 ft 1470.0 mm Less
Ground Clearance 2.4 ft 720.0 mm Less
Track Length 16.5 ft 5030.0 mm Less
Track Length to Center of Rollers 13.3 ft 4040.0 mm Less
Track Gauge 9.6 ft 2930.0 mm Less
Transport Width 11.6 ft 3530.0 mm Less

Working Ranges & Forces

Maximum Digging Depth 23.9 ft 7270.0 mm Less
Boom Reach 6.5 m (21'4") Reach 6.5 m (21'4") Less
Stick Reach R3.2DB (10'6") Reach R3.2DB (10'6") Less
Bucket GD 2.27 m³ (2.97 yd³) GD 2.27 m³ (2.97 yd³) Less
Maximum Reach at Ground Level 36.0 ft 10980.0 mm Less
Maximum Cutting Height 34.6 ft 10550.0 mm Less
Maximum Loading Height 24.0 ft 7330.0 mm Less
Minimum Loading Height 9.3 ft 2830.0 mm Less
Maximum Depth Cut for 2440 mm (8 ft) Level Bottom 23.3 ft 7110.0 mm Less
Maximum Vertical Wall Digging Depth 17.5 ft 5330.0 mm Less
Bucket Digging Force - ISO 47150.0 lbf 210.0 kN Less
Stick Digging Force - ISO 37300.0 lbf 186.0 kN Less


  • Increase operating efficiency up to 45 percent with standard Cat technologies that lower operator fatigue and operating costs, including fuel consumption and daily maintenance.
  • Get up to 15 percent higher fuel efficiency — more work per unit of fuel — than the Cat 340F excavator.
  • Match the excavator to the job with three power modes — Power, Smart, and Eco. Smart mode automatically matches engine and hydraulic power to digging conditions, providing max power when needed and reducing power when it isn’t to help save fuel.
  • The advanced hydraulic system provides the optimum balance of power and efficiency while giving you the control you need for precise digging requirements.
  • Auxiliary hydraulic options give you the versatility to use a wide range of Cat attachments.
  • Don’t let the temperature stop you from working. This excavator has a high-ambient capability of 52° C (125° F) and cold start capability of –18° C (0° F).
  • Self-sharpening Advansys™ bucket tips increase production and lower costs with more tip life.


  • Boost productivity up to 45 percent versus traditional grading with standard Cat GRADE with 2D system – includes indicate-only and laser capability.
  • Standard Grade Assist: Stay on grade – simply and effortlessly – with single-lever digging.
  • Set your desired bucket angle and let Bucket Assist automatically maintain the angle in sloping, leveling, fine grading, and trenching applications.
  • Keep the tracks on 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: Achieve precise load targets and increase loading efficiency with on-the-go weighing and real-time estimates of your payload without swinging.
  • Combine Payload with VisionLink® and remotely manage your production targets.
  • Upgrade to optional Cat GRADE with Advanced 2D: Create and edit grade designs with ease on a second high-resolution 254 mm (10 in) touchscreen monitor.
  • Upgrade to optional Cat GRADE with 3D: Create and edit designs with ease and see the front linkage’s full range of motion on a second high-resolution 254 mm (10 in) touchscreen monitor.
  • Know the excavator’s exact position relative to GPS and GLONASS systems. The machine automatically compensates for excavator pitch and roll caused by sloping ground conditions.
  • Remote Troubleshoot connects you to a dealer service pro to help solve your problem and quickly get you to work.
  • Remote Flash works around your schedule to ensure your machine’s software is up to date for optimal performance.
  • The Cat App helps you manage fleet location, hours, and maintenance schedules; it also alerts you for required maintenance and even allows you to request service from your local Cat dealer.
  • 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 job site efficiency with lower operating costs.
  • The Cat attachment locator can help you find tools, track work time, and plan maintenance and replacement – all through your Cat App equipped smartphone.


  • Choose between Deluxe and Premium cabs — both with automatic climate control.
  • Sit in wide seats that adjust for all size operators.
  • Stay warm with the Deluxe seat; stay warm and cool with the Premium seat.
  • Enjoy wide spacing between consoles for a more comfortable environment.
  • Get in and out of the cab easier using the tip-up left console.
  • Advanced viscous mounts reduce cab vibration up to 50 percent over previous excavator models.
  • Control the excavator comfortably with easy-to-reach controls all located in front of you.
  • Stow your gear with plenty of in-cab storage beneath and behind the seat, overhead, and in the consoles. A cup holder, document holder, bottle holder, and coat hook are also provided.
  • Use the standard radio’s USB ports and Bluetooth® technology to connect personal devices and make hands-free calls.


  • Start the engine with a push button; use a Bluetooth key fob, smartphone app, or the unique Operator ID function.
  • Program your power mode and joystick preferences using Operator ID; the excavator will remember them every time you go to work.
  • Automatic hydraulic oil warm up gets you to work faster in cold temperatures and helps prolong the life of components.
  • Navigate quickly on the standard high-resolution 254 mm (10 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 and Cat GRADE with 3D.
  • Not sure how a function works or how to maintain the excavator? Always have the operator’s manual at your fingertips in the touchscreen monitor.


  • Expect up to 15 percent less maintenance cost than the 340F due to extended and synchronized service intervals and smaller fluid quantities. (Savings calculated over 12,000 machine hours.)
  • Check hydraulic system oil and easily drain fuel system water and fuel tank water from ground level.
  • Track your excavator’s filter life and maintenance intervals via the in-cab monitor.
  • Change all fuel filters at a synchronized 1,000 hours. Oil and fuel filters are grouped and located on right-hand side of machine for easy maintenance.
  • The new air intake filter with pre-cleaner has double the dirt holding capacity of the previous air intake filter.
  • 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 percent longer than previous filter designs.
  • The high-efficiency cooling system fan has an optional auto reverse function; set the interval you want and it will quickly blow out debris without interrupting your work.
  • S·O·S ports are on ground level, simplifying maintenance and allowing for quick, easy extraction of fluid samples for 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 job site accidents.
  • The standard ROPS cab meets ISO 12117-2:2008 requirements.
  • A travel direction indicator helps operators know which way to activate the travel levers.
  • Enjoy great visibility into the trench, in each swing direction, and behind you with the help of smaller cab pillars, larger windows, and a flat engine hood design.
  • A ground-level shutoff switch stops all fuel to the engine when activated and shuts down the machine.
  • A rearview camera is standard. Upgrade to 360° visibility and you’ll easily visualize objects and personnel around the excavator in a single view.
  • Serrated steps and anti-skid punch plate on the service platform help prevent slipping.


  • The 340 is available in a variety of configurations for your specific line of work -
  1. Reach boom is ideal for earthmoving work.
  2. Mass boom is the best choice for quarry work.
  3. Long Reach boom is perfect for slope and ditch work.
  4. Straight boom is excellent for demolition work up to four stories.

340 Standard Equipment

  • Not all features are available in all regions. Please check with your local Cat dealer for specific offering availability in your area.

  • ROPS, standard sound suppression
  • Mechanically adjustable seat suspension

  • Three selectable modes: Power, Smart, Eco
  • One-touch low idle with automatic engine speed control
  • 2300m altitude capability with no engine power de-rating
  • 52° C (126° F) high-ambient cooling capacity
  • -18° C (0° F) cold start capability
  • Double element air filter with integrated pre-cleaner
  • Remote disable
  • Biodiesel capability up to B20

  • Boom and stick regeneration circuit
  • Electronic main control valve
  • Automatic hydraulic oil warm up
  • Reverse swing damping valve
  • Automatic swing parking brake
  • High performance hydraulic return filter
  • Two speed travel
  • Bio hydraulic oil capability

  • Towing eye on baseframe (ISO 15818 Compliant)
  • 7.56 mt (16,667 lb) counterweight

  • Maintenance-free 1000 CCA batteries (x2)
  • Centralized electrical disconnect switch
  • LED chassis light

  • Cat Product Link
  • Cat GRADE with 2D
  • Cat GRADE with Assist
  • Cat Payload
  • 2D E-Fence

  • Grouped location of engine oil & fuel filters
  • Scheduled Oil Sampling (S.O.S) ports

  • Caterpillar One Key security system
  • Lockable external tool / storage box
  • Lockable door, fuel and ydraulic tank locks
  • Lockable fuel drain compartment
  • Service platform with anti-skid plate & recessed bolts
  • RH handrail & hand hold (ISO 2867 Compliant)
  • Standard visibility morrir package
  • Signaling / warning horn
  • Ground-level secondary engine shutoff switch
  • Rear and sideview cameras

340 Optional Equipment

  • ROPS, advanced sound suppression
  • High-resolution 254 mm (10") LCD touch screen monitor
  • Heated seat with air-adjustable suspension (Deluxe only)
  • Heated and cooled seat with automatic adjustable suspension (Premium only)

  • Cold start block heaters
  • -32° C (-25° F) cold start capability

  • Smart Boom
  • Heavy lift mode
  • Combined two-way auxiliary circuit with direct return
  • Medium-pressure auxiliary circuit
  • Cooling circuit
  • Quick coupler circuit for Cat Pin Grabber and CW Dedicated

  • Long undercarriage
  • 600mm (24") triple grouser track shoes
  • 600mm (24") HD triple grouser track shoes
  • 600mm (24") double grouser track shoes
  • 700mm (28") triple grouser track shoes
  • 850mm (33") HD triple grouser track shoes

  • 6.18m (20'3") Mass boom
  • 6.5m (21'4") HD Reach boom
  • 2.55m (8'4") stick
  • 2.8m (9'2") HD stick
  • 3.2m (10'6") HD stick

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

  • Preventative maintenance ready (Quick Evac TM)
  • Electric refueling pump with automatic shutoff

  • Boom lowering check valve
  • Stick lowering check valve
  • 360° Visibility
  • Cat asset tracker