340 UHD Ultra High Demolition Hydraulic Excavator



Technical Specifications
Benefits and Features

The Cat® 340 UHD provides optimum machine solutions for building demolition up to 8 stories. With its unique coupling system, you can switch between two lengths of Ultra High Demolition fronts and two types of Retrofit booms and sticks with no special tools in 15 minutes. You simply won’t find a better 50-ton class choice for demolition..

Operating Weight 128000 lb
Note (1) Operating Weight includes Cat MP332 Multiprocessor with Pulverizer Jaws
Machine Weight - UHD Configuration 120600 lb
Note (2) 340 UHD with 22m (72' 2") Front, 9.0 mt (19,842 lb) counterweight, hydraulically variable undercarriage 600 mm (24") HD TG tracks and no Work Tool
Machine Weight - Retrofit Configuration 139300 lb
Note (3) 340 Retrofit boom with R3.2DB (10' 6") stick, 9.0 mt (19,842 lb) counterweight, hydraulically variable undercarriage 600 mm (24") HD TG tracks and 2.27 m3 (2.97 yd3) GD bucket
UHD in Cradle 19460 lb
Retrofit Boom in Cradle - R3.35 TB Stick 15700 lb
Retrofit Boom in Cradle - R2.9 TB Stick 15460 lb
2-piece Retrofit boom in cradle - R3.2 DB stick 18980 lb
Working Ranges and Forces
Maximum Pin Height at Stick Nose 72.2 ft
Maximum Weight at Stick Nose 8160 lb
Maximum Working Pin Height at Stick Nose - 1/2 61 ft
Maximum Working Reach at Stick Nose - 1/2 45.4 ft
Maximum Height at Stick Nose in Max Reach Position 41.5 ft
Maximum Reach at Stick Nose 44.4 ft
Note (1) 22 m (72' 2") UHD Front Over-the-Front
Engine Model Cat C9.3B
Engine Power - ISO 14396 314 HP
Bore 4.5 in
Stroke 5.9 in
Displacement 568 in³
Hydraulic System
Main System - Maximum Flow 558 l/min (147 gal/min)
Maximum Pressure - Equipment 5076 psi
Maximum Pressure - Equipment - Lift Mode 5511 psi
Maximum Pressure - Travel 5076 psi
Maximum Pressure - Swing 4264 psi
Swing Mechanism - UHD Fronts
Swing Speed 5.2 r/min
Swing Mechanism
Swing Speed 8.84 r/min
Maximum Swing Torque 106000 ft·lbf
Service Refill Capacities
Fuel Tank Capacity 159 gal (US)
Cooling System 10 gal (US)
Engine Oil 8 gal (US)
Swing Drive 5 gal (US)
Final Drive - Each 2 gal (US)
Hydraulic System - Including Tank 145.3 gal (US)
Hydraulic Tank 43 gal (US)
DEF Tank 21 gal (US)
Note (1) UHD Front
Shipping Height - Top of Cab 11.1 ft
Shipping Length 59.6 ft
Tail Swing Radius 11.6 ft
Counterweight Clearance 4.6 ft
Ground Clearance 1.66 ft
Track Length 18.9 ft
Track Gauge 9.3 ft
Track Length to Center of Rollers 15.6 ft
Working Gauge - Extended Position 11.1 ft
Shipping Gauge - Retracted Position 7.8 ft
Transport Width 9.83 ft
Machine Length - without Front, with Counterweight 23.25 ft
Machine Length - without Front and Counterweight 22.83 ft
Cab Height - With FOGS 11.75 ft
Track Width - Extended 13.08 ft
Track Width - Retracted 9.83 ft
Note (2) 600 mm (24") Track Shoe
Working Ranges and Forces - Retrofit Boom - Straight
Note 1 Straight - R3.9 m DB stick (12' 10") Over-the-Front
Maximum Pin Height at Stick Nose 42.6 ft
Maximum Weight at Stick Nose 13190 lb
Maximum Height at Stick Nose in Max Reach Position 7.6 ft
Maximum Reach at Stick Nose 37.2 ft
Bucket 2.27 M3 (2.97 yd3) General Duty
Maximum Digging Depth 19.75 ft
Maximum Reach - Ground Level 42.3 ft
Maximum Loading Height 35.2 ft
Minimum Loading Height 3.9 ft
Bucket Digging Force - ISO 47160 lbf
Stick Digging Force - ISO 32440 lbf
Working Ranges and Forces - Retrofit Boom - Bent
Note 1 Bent - R3.9 m DB stick (12' 10") Over-the-Front
Bucket 2.27 M3 (2.97 yd3) General Duty
Maximum Digging Depth 24.8 ft
Maximum Reach - Ground Level 39.1 ft
Maximum Cutting Height 35.66 ft
Maximum Loading Height 25.2 ft
Minimum Loading Height 7.25 ft
Bucket Digging Force - ISO 47160 lbf
Stick digging Force - ISO 32440 lbf


  • Optional integrated vehicle health management system alerts the operator with service guidance and parts needed to enhance uptime.
  • Make the jobsite safer with an optional swing alarm.

Not all features are available in all regions. Please check with your local Cat dealer for specific offering availability in your area.
Build Number: 07E


  • UHD can reach up to 18.6m (60 ft 11 in) of vertical pin height, working with a 3.7 ton (8,157 lbs) tool with 11.7m (38 ft 4 in) horizontal reach.
  • Cat active stability monitoring system continuously informs operators of work tool position within the safe working range and warns when approaching the stability limit.
  • Hydraulically actuated variable gauge undercarriage provides outstanding stability extended to 4000 mm (13 ft); it retracts to
    3000 mm (10 ft) to make transportation easier.
  • Standard rearview and right-hand sideview cameras give clear views on the monitor.
  • The C9.3B engine can run on biodiesel up to B20 and meets
    EU Stage V, U.S. EPA Tier 4 Final, and Japan 2014 emission standards.
  • Match the excavator to the job with three power modes – Power, Smart, and ECO. Smart mode automatically matches engine and hydraulic power to working requirements, providing maximum power when needed and reducing power when it isn’t to help save fuel.
  • The high-efficiency hydraulic reversing fan cools the engine on demand to help reduce fuel consumption.
  • Cat technologies increase operating efficiency to lower operator fatigue, operating costs, and fuel consumption.


  • Demolition cab with FOGS includes front and roof of P5A
    10 mm (0.4”) laminated glass.
  • Tilt-up 30° for a more productive and comfortable sight line.
  • The windshield and roof one-piece parallel wipers with three intermittent settings includes washer spray.
  • Premium heated and cooled seat is standard.
  • Get in and out of the cab easier using the tip-up left console.
  • 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.


  • Start the engine with a push button; use a Bluetooth key fob or the unique Operator ID function.
  • 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.
  • Automatic hydraulic oil warmup gets you to work faster in cold temperatures and helps prolong the life of components.
  • Navigate quickly on the high-resolution 254 mm (10 in) touchscreen monitor or with the aid of the jog dial control.
  • Make moving the excavator much easier with 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.
  • 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.


  • 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.
  • 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 jobsite efficiency with lower operating costs.
  • Remote troubleshoot connects you to a dealer service professional 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 PL161 attachment locator can help you find tools, track work time, and plan maintenance and replacement.


  • Enjoy low maintenance cost due to extended service intervals.
  • 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 the right-hand side of the machine for easy maintenance.
  • The engine air intake filter with pre-cleaner has double the dust holding capacity of the previous air intake filter.
  • The hydraulic oil filter provides improved filtration; anti-drain valves keep oil clean when the filter is replaced.
  • S•O•SSM ports simplify maintenance and allow for quick, easy extraction of fluid samples for analysis.


  • On-board stability monitoring helps the operator enhance jobsite safety.
  • A travel direction indicator helps the operator know which way to activate the travel levers.
  • Enjoy greater visibility in each swing direction with the help of narrow cab pillars and large windows.
  • A ground-level shutoff switch stops all fuel to the engine when activated and shuts down the machine.
  • Rearview and right-hand sideview cameras are standard.
  • Serrated steps and an anti-skid punch plate on the service platform help prevent slipping.

Standard Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Booms And Sticks
    • Advanced tool control, UHD
  • Cab
    • Tilt-up demolition cab with P5A 10 mm laminated front and roof glass
    • High resolution touchscreen monitor
    • Premium heated and cooled auto adjustable suspension seat
    • Bluetooth integrated radio
    • 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
    • Cat Stick Steer
    • Auxiliary relay
    • Tilt rocker switch
    • Sky wiper switch
    • LED interior lights
    • Roller front sunscreen
    • P5A fixed windshield
    • FOGS guarding
  • Cat Technology
    • Cat Product Link
    • Remote Services capability
    • Stability monitoring system for UHD
    • Electronic pitch and roll indicator
    • Swing E-Fence
    • Travel direction indicator
    • Operator coaching
    • Electronic joystick pattern changer
    • Cat Grade with 2D and offset memory (Retrofit boom only)
    • Cat Payload (Retrofit boom only)
  • Electrical System
    • Maintenance-free 1,000 CCA batteries (x 4)
    • Centralized electrical disconnect switch
    • LED lights
  • Engine
    • Three selectable modes: Power, Smart, ECO
    • Auto engine speed control
    • Up to 4500 m (14,760 ft) altitude capability
    • Reverse fan
    • 52° C (126° F) high-ambient cooling
    • -18° C (0° F) cold start capability
    • Double element air filter with integrated pre-cleaner
  • Hydraulic System
    • Boom and stick regeration circuit
    • Electronic main control valve
    • Auto hydraulic oil warmup
    • Auto swing parking brake
    • High Performance hydraulic return filter
    • Two-speed travel
    • Bio hydraulic oil capability
  • Safety And Security
    • Cat One Key security system
    • Lockable external tool/storage box
    • Lockabel door, fuel, and hydraulic tanks
    • Lockable fuel drain compartment
    • Service platform with anti-skid plate and recessed bolts
    • Rear and right-hand side cameras
  • Service And Maintenance
    • Grouped location of engine oil and fuel filters
    • Scheduled Oil Sampling (S·O·S) ports
  • Undercarriage And Structures
    • Full-length track guiding guards
    • Travel motor guard
    • Bottom guard

Optional Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Booms And Sticks
    • 22 m (72 ft 2 in) UHD front
    • 25 m (82 ft) UHD front
    • 2-piece Retrofit variable adjustment boom
    • 7.4 m (24 ft 3 in) Retrofit boom
    • R3.9 m ( 12 ft 10 in) DB Retrofit stick
    • R3.2 m (9 ft 6 in) DB Retrofit stick
    • R2.8 m (9 ft 2 in) DB Retrofit stick
    • DB linkage with lifting eye
    • Cradle for UHD front parts
    • Cradle for Retrofit front parts
  • Cab
    • Roller rear sunscreen
  • Electrical System
    • Premium surround lighting package
  • Engine
    • -32° C (-25° F) cold start capability
    • Cold start block heaters
    • Ether starting aid
  • Hydraulic System
    • Boom lowering check valve (BLCV) for UHD front
    • Stick lower check valve (SLCV) for UHD front
    • SmartBoom with BLCV and Overload Warning Device for UHD front
    • Combined two-way auxiliary circuits
    • High and medium-pressure auxiliary circuits
    • Quick coupler circuit
    • Fine swing
  • Safety And Security
    • 360 visibility
  • Service And Maintenance
    • QuickEvav maintenance ready
    • Electric refuleing pump with auto shutoff
  • Undercarriage And Structures
    • Long hydraulic Variable Gauge (VG) undercarriage
    • Long undercarriage
    • 600 mm (24 in) double grouser track shoes
    • 600 mm (24 in) triple grouser track shoes
    • 700 mm (28 in) triple grouser track shoes

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