340 – Tier 3

340 Hydraulic Excavator

With up to 10 percent more productivity than the model it replaces, the Cat® 340 is the best in its class for moving tons per hour. Add in the excavator’s low owning and operating costs and you will profit like nobody’s business.


Cab Monitor Improvements


  1.  Continuously improved user interface allows for intuitive navigation, minimizing performance interruption with the easy-to-use touchscreen menu.

  3. Identify apps quickly with a grid list view, abbreviated app names, and categorized menu options. 

  5. A new notification center keeps important information visible to the operator, and displays messages without shrinking the camera view.

  7. Color coded notifications set critical messages apart from the rest.

  9. Use the in-monitor QR code to learn about machine technology and features through a full suite of "how-to" videos.

Operator Coaching  


  1. Operator Coaching is an in-cab system that recognizes specific opportunities for operators to be more productive and prevent unnecessary machine wear and tear.

  3.  After detecting inefficient or restricted actions, the system alerts the operator and provides insight into the inefficiency and steps to improve.

  5. Paired with a VisionLink Productivity subscription, this information and other Operator Coaching insights can be viewed from anywhere.

  • Standard integrated vehicle health management system alerts the operator with service guidance and parts needed to enhance uptime. 

  • Enhance visibility to make service work easier and safer with optional inspection lighting.

Not all features are available in all regions. Please check with your local Cat dealer for specific offering availability in your area. Build Number: 08C

High Performance


  • The C9.3B engine generates more power than the 2020 model year 336 engine.

  • More power to the pumps, wider undercarriage, and heavier counterweight enable up to 10 percent more productivity.

  • Match the excavator to the job with three power modes – Power, Smart, and Eco. Power mode is maximum power all the time. Smart mode automatically matches engine and hydraulic power to digging conditions, providing maximum power when needed and reducing power when it isn’t to help save fuel. Eco mode reduces engine speed and keeps it constant to reduce fuel consumption.

Efficiency Through Technology



  • Boost productivity up to 45% versus traditional grading with optional Cat Grade with 2D system – includes indicate-only and laser capability.​

  • Want a 3D system to improve your digging results? Caterpillar's single antenna global navigation satellite system (GNSS) makes it easy by giving you visual and auditory guidance to grade. Plus, you can create and edit designs on the touchscreen monitor while you’re on the job. If your application calls for a dual antenna system, it’s easy to upgrade.​

  • Upgrade to our dual antenna GNSS for maximum grading efficiency. The system lets you create and edit designs on the touchscreen monitor while you’re on the job, or you can have the plan design sent to the excavator to make your work easier. Plus, you get added benefits of avoidance zones, cut and fill mapping, lane guidance, and augmented reality along with advanced positioning capability.​

  • Optional Grade Assist helps you stay on grade – simply and effortlessly – with single-lever digging.​

  • Dig with guidance to depth, slope, and horizontal distance to grade. You can set up to four different depth and slope targets to help save time and money.​

  • Automatically stop excavator swing at operator-defined set points in truck loading and trenching applications with optional Swing Assist.​

  • Cat Payload helps you achieve precise load targets to improve your operating efficiency. Pick up a load of material--with a bucket and thumb combination or grapple and clamshell attachments--and get a real-time weight estimate without swinging.​

  • Combine Payload with VisionLink® and remotely manage your production targets.​

  • Operator Coaching is an in-cab system that recognizes specific opportunities for operators to be more productive and prevent unnecessary machine wear and tear.  

Take The Guesswork Out of Managing Your Equipment



  • ​VisionLink® provides actionable data insights for all assets - regardless of fleet size or equipment manufacturer.* Review equipment data from your desktop or mobile device to maximize uptime and optimize assets. Dashboards provide information such as hours, miles, location, idle time, and fuel utilization. Make informed decisions that lower costs, simplify maintenance, and improve safety and security on your jobsite.​

  • VisionLink® Productivity gathers and summarizes machine telematics and jobsite data from all your equipment – regardless of the manufacture.* View actionable information such as idle time, fuel burn, location, payload, load counts, total cycles, and more to improve machine efficiency, productivity, and utilization. Access data anywhere via a mobile, tablet, or desktop device - on or off the jobsite.​

  • Cat® Inspect is a mobile application that allows you to easily perform digital preventative maintenance (PM) checks, inspections, and daily walkarounds. Inspections can easily be integrated with other Cat data systems like VisionLink® so you can keep a close eye on your fleet.​

  • Remote Troubleshoot is a mobile application that allows your Cat dealer to perform diagnostic testing on your connected machine remotely to help ensure that issues are resolved quickly and with less downtime.​

  • Remote Flash is a mobile application that allows you to update onboard software without a technician being present, allowing you to initiate software updates when convenient, increasing your overall operating efficiency.​

  • The Cat PL161 attachment locator allows you to track attachments across all worksites, reduce the number of lost attachments, and plan for attachment maintenance and replacement. The work tool recognition feature automatically adjusts machine settings based on the selected tool.​


* Data field availability can vary by equipment manufacturer.​

Built for Rugged Conditions


  • Reinforced structures ensure long-term durability in harsh environments.

  • Work up to 4500 m (14,764 ft) above sea level.

  • Standard high-ambient temperature capability is 52° C (125° F) with cold start capability at –18° C (0° F).

  • An optional battery-operated engine heater enables starting at –32° C (–25.6° F).

  • Auto hydraulic oil warmup gets you to work faster in cold temperatures and helps prolong the life of components.

  • Two levels of filtration protect the engine from low-quality diesel fuel.

  • Grease sealed between track pins and bushings reduces travel noise and prevents debris from entering to increase undercarriage life.

Work in Comfort


  • Choose between Essential and Deluxe cabs – both with automatic climate control.

  • Deluxe cab comes with heated seat to keep you warm and tilt-up left console to enable easy entry and exit.

  • 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.

  • Use the standard radio’s USB ports and Bluetooth® technology to connect personal devices and make hands-free calls.

Simple to Operate


  • Start the engine with the push of a button; use a Bluetooth key fob or Operator ID passcode.

  • Program each joystick button, including power mode, response, and pattern, using Operator ID; the machine will remember what you set each time you go to work.

  • Trouble cutting through tough material? Optional auto dig boost gives you an automatic power increase of 8 percent when you need it for better bucket penetration, shorter cycle times, and greater payloads.

  • Need more lift during your shift? Optional auto heavy lift gives you 8 percent more power exactly when you need it for as long as you need it.

  • Make moving the excavator much easier with optional Cat Stick Steer. Simply push a button and use one hand to travel and turn instead of both hands or feet on levers or pedals.

  • Cat continues to improve user interface functionality for operators of all skill levels. The touchscreen monitor is an easy-to-use operating tool that presents the jobsite dashboard with an intuitive format. Productivity applications are displayed in grid-view to read on-the-go, and touchscreen navigation is programmed to make sure job performance continues without any hold ups.

  • Make operating easier with the touch of a joystick button. Additional auxiliary relays allow you to power on or turn off a CB radio, beacon light, and even a dust suppression watering system without taking your hands off the joysticks.

  • Protect your hammer from overworking. Auto hammer stop warns you after 15 seconds of continuous firing and then automatically shuts it off after 30 seconds – all to prevent wear and tear on the attachment and excavator.

  • 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.




  • 2D E-Fence prevents the excavator from moving outside of operator-defined set points; the system works with thumb and bucket combinations along with hammer, grapple, and clamshell attachments.

  • Cat Detect - People Detection helps protect the most valuable asset on any jobsite – people. The system uses smart cameras with depth sensors to provide the operator with visual and auditory alerts so he or she can take immediate action when a person is too close to the excavator.  

  • The Rollover Protective Structure (ROPS) cab meets industry standards and protects the operator in the event of a rollover.

  • Enjoy great visibility with the help of narrow cab pillars, large windows, and a flat engine hood design.

  • Make service work easier and safer with optional inspection lighting. With the flip of a switch, lights will illuminate the engine, pump, battery, and radiator compartments to enhance visibility.  

  • Optional Cat Lift Assist helps you avoid tipping by letting you know if your load is within the excavator’s safe working range.

  • A travel direction indicator helps you know which way to activate travel levers.

  • Enhance jobsite safety. Add a swing alarm to alert people when you're rotating from trench to stockpile and back again.

  • Keep your excavator secure with Operator ID. Use your PIN code on the monitor to enable the push button starting feature.

  • A ground-level shutoff switch stops all fuel to the engine when activated and shuts down the machine. 

  • Serrated steps and anti skid punch plate on the service platform help prevent slipping.   

  • A rearview camera is standard.

Easy Maintenance



  • Boost productivity with proactive service reminders. Our integrated vehicle health management system alerts the operator with step-by-step service guidance along with parts needed so you don't experience any unnecessary downtime.  

  • Expect less maintenance cost due to 1,000 hour engine oil intervals.

  • Change all fuel filters at a synchronized 1,000 hours. Filters are grouped and located on right-hand side of machine for easy maintenance.

  • Check hydraulic system oil and easily drain fuel system water and fuel tank water from ground level.

  • The air intake filter with pre-cleaner has high dust holding capacity.

  • The hydraulic oil filter provides superior filtration; anti-drain valves keep oil clean when the filter is replaced.

  • The high-efficiency hydraulic fan has an optional automatic reverse function to keep cores free from debris, eliminating the need for any operator interaction.

  • S∙O∙SSM  ports are on ground level, simplifying maintenance and allowing for quick, easy extraction of fluid samples for analysis.

Standard Equipment

  • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • VisionLink®
  • Cat Grade 2D
  • Remote Flash
  • Remote Troubleshoot
  • Cat Assist
  • Cat Payload
  • Compatibility with radios and base stations from Trimble, Topcon, and Leica
  • Capability to install 3D grade systems from Trimble, Topcon, and Leica
  • Maintenance-free 1,000 CCA batteries (x2)
  • Centralized electrical disconnect switch
  • LED exterior chassis and boom lights
  • Three selectable modes: Power, Smart, Eco
  • Auto engine speed control
  • -18°C (0°F) cold start capability
  • Double element air filter with integrated pre-cleaner
  • Remote disable
  • Boom and stick regeneration circuit
  • Electronic main control valve
  • Auto hydraulic oil warmup
  • Bio hydraulic oil capability
  • Fine swing
  • Reverse swing damping valve
  • Auto swing parking brake
  • High performance hydraulic return filter
  • Two speed travel
  • Auto hammer stop
  • Caterpillar One Key security system
  • Lockable external tool / storage box
  • Lockable door, fuel, and hydraulic tank locks
  • Lockable fuel drain compartment
  • Lockable disconnect switch
  • Service platform with anti-skid plate & recessed bolts
  • RH handrail and handhold
  • Signaling / warning horn
  • Ground-level secondary engine shutoff switch
  • Rearview camera
  • Inspection lighting
  • Integrated vehicle health management system
  • Grouped location of engine oil & fuel filters
  • Scheduled Oil Sampling (S.O.S) ports
  • Towing eye on base frame
  • Swivel guard
  • HD bottom guard
  • HD travel motor guards
  • Grease lubricated track
  • HD swing frame
  • HD swing bearing
  • 7.56 mt (16,667 lb) counterweight
  • High-resolution 203 mm (8") LCD touchscreen monitor
  • Auto bi-level air conditioner
  • Jog dial and shortcut keys for monitor control
  • Keyless push-to-start engine control
  • Height-adjustable console
  • Tilt-up left-side console
  • Heated air-suspension seat
  • Monitor integrated Bluetooth radio with USB/Aux ports
  • 12V DC outlets
  • Beverage holder
  • Cup holder
  • Openable polycarbonate skylight hatch
  • LED dome light
  • Floor welcome light
  • Roller front sunscreen
  • Roller rear sunscreen
  • Beacon ready
  • High-resolution 203 mm (8") LCD touchscreen monitor
  • Auto bi-level air conditioner
  • Keyless push-to-start engine control
  • Air-suspension seat
  • Bluetooth radio with USB/Aux ports
  • 24V DC outlet
  • Beverage holder
  • Openable steel hatch
  • LED dome light
  • Roller front sunscreen

Additional information

Offering Type

Engine - Net Power - ISO 9249

258.3 kW ( 346 HP )

Engine - Net Power - ISO 9249 (DIN)

351 hp (metric) ( 351 hp (metric) )

Engine Model

Cat C9.3B

Engine Power - ISO 14396

259 kW ( 347 HP )

Engine Power - ISO 14396 (DIN)

352 hp (metric) ( 352 hp (metric) )

Engine - Bore

115 mm ( 5 in )

Engine - Stroke

149 mm ( 6 in )

Engine - Displacement

9.3 l ( 568 in³ )

Engine - Biodiesel Capability

Up to B20¹

Engine - Emissions

Emits equivalent to U.S. EPA Tier 3 and EU Stage IIIA.

Engine - Note (1)
Engine - Note (2)
Hydraulic System - Main System - Maximum Flow

560 l/min ( 148 gal/min )

Hydraulic System - Maximum Pressure - Equipment

35000 kPa ( 5076 psi )

Hydraulic System - Maximum Pressure - Equipment - Lift Mode

38000 kPa ( 5511 psi )

Hydraulic System - Maximum Pressure - Travel

35000 kPa ( 5076 psi )

Hydraulic System - Maximum Pressure - Swing

29400 kPa ( 4264 psi )

Swing Mechanism - Swing Speed

8.84 r/min ( 8.84 r/min )

Swing Mechanism - Maximum Swing Torque

143 kN·m ( 105214 ft·lbf )

Weights - Operating Weight

36800 kg ( 81200 lb )

Service Refill Capacities - Fuel Tank Capacity

600 l ( 158.5 gal (US) )

Service Refill Capacities - Cooling System

40 l ( 10.5 gal (US) )

Service Refill Capacities - Engine Oil

32 l ( 8.5 gal (US) )

Service Refill Capacities - Swing Drive - Each

18 l ( 4.8 gal (US) )

Service Refill Capacities - Final Drive - Each

8 l ( 2.1 gal (US) )

Service Refill Capacities - Hydraulic System - Including Tank

373 l ( 98.5 gal (US) )

Service Refill Capacities - Hydraulic Tank

161 l ( 42.5 gal (US) )

Dimensions - Boom

Reach 6.5 m (21'4")

Dimensions - Stick

Reach 3.2 m (10'6")

Dimensions - Bucket

GD 2.50 m³ (3.27 yd³)

Dimensions - Shipping Height - Top of Cab

3180 mm ( 10.5 ft )

Dimensions - Handrail Height

3180 mm ( 10.5 ft )

Dimensions - Shipping Length

11160 mm ( 36.8 ft )

Dimensions - Tail Swing Radius

3530 mm ( 11.7 ft )

Dimensions - Counterweight Clearance

1260 mm ( 4.2 ft )

Dimensions - Ground Clearance

510 mm ( 1.8 ft )

Dimensions - Track Length

5030 mm ( 16.5 ft )

Dimensions - Track Length to Center of Rollers

4040 mm ( 13.3 ft )

Working Ranges & Forces - Boom

Reach 6.5 m (21'4")

Working Ranges & Forces - Stick

Reach 3.2 m (10'6")

Dimensions - Track Gauge

2740 mm ( 9 ft )

Dimensions - Transport Width - 600 mm (24”) Shoes

3340 mm ( 10.11 ft )

Working Ranges & Forces - Bucket

GD 2.50 m³ (3.27 yd³)

Working Ranges & Forces - Maximum Digging Depth

7480 mm ( 24.5 ft )

Working Ranges & Forces - Maximum Reach at Ground Level

11020 mm ( 36.3 ft )

Working Ranges & Forces - Maximum Cutting Height

10360 mm ( 34 ft )

Working Ranges & Forces - Maximum Loading Height

7120 mm ( 23.3 ft )

Working Ranges & Forces - Maximum Depth Cut for 2440 mm (8 ft) Level Bottom

7320 mm ( 24 ft )

Working Ranges & Forces - Maximum Vertical Wall Digging Depth

5550 mm ( 18.3 ft )

Working Ranges & Forces - Bucket Digging Force - ISO

209 kN ( 46940 lbf )

Working Ranges & Forces - Stick Digging Force - ISO

165 kN ( 37200 lbf )

Air Conditioning System - Air Conditioning
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