340 Straight Boom

340 Straight Boom Excavator

Cat® 340 hydraulic straight boom excavators bring power, performance, and control to your low level demolition projects.

340 Hydraulic Excavator


With its new cab, long maintenance intervals, and power system that improves fuel efficiency up to 15 percent, the Cat® 340 is the perfect choice for low-level demolition, sorting, and other excavation tasks.

With its new cab, long maintenance intervals, and power system that improves fuel efficiency up to 15 percent, the Cat® 340 is the perfect choice for low-level demolition, sorting, and other excavation tasks.


  • Optional Cat Command remote control allows you to work outside of the cab to help avoid potential hazards.
  • 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

340 Straight Boom Latest Features
Cat 340 Straight Boom Demolition Excavator - DO MORE WITH LESS FUEL


  • Expect high fuel efficiency – more work per unit of fuel.
  • Match the excavator to the job with three power modes – Power, Smart, and Eco. Smart mode automatically matches engine and hydraulic power to working conditions, providing max power when needed and reducing power when it isn’t to help save fuel.
  • Auxiliary hydraulic options give you the versatility to use a wide range of Cat attachments, including the heaviest tools needed for demolition work.
  • 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).
  • Advansys™ bucket tips increase production and lower costs with more tip life.
  • Know where your work tools are and how much you use them; the machine can track all attachments equipped with the Cat PL161 attachment locator.
  • 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 demolition cab comes with a deluxe heated seat andclimate control.
  • Get in and out of the cab easier with 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. 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.

Cat 340 Straight Boom Demolition Excavator - WORK IN COMFORT
Cat 340 Straight Boom Demolition Excavator - SIMPLE TO OPERATE


  • Start the engine with a push button; use a Bluetooth key fob 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 warmup 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.
  • 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.
  • Need more lift during your shift? Auto heavy lift gives you 8% more power exactly when you need it for as long as you need it.
  • 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 low maintenance cost with extended and synchronized 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 grouped and located on right-hand side of machine for easy maintenance.
  • The air intake filter with pre-cleaner has high dust holding capacity.
  • The hydraulic oil filter provides improved filtration performance; 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·S ports simplify maintenance and allow for quick, easy extraction of fluid samples for analysis.

Cat 340 Straight Boom Demolition Excavator - LOWER MAINTENANCE COSTS
Cat 340 Straight Boom Demolition Excavator - BUILT-IN SAFETY FEATURES


  • The front windshield and top hatch are made with EN 356 P5A glazing for enhanced impact resistance.
  • The standard ROPS cab meets ISO 12117-2:2008 requirements.
  • The standard FOGS enhances overhead safety.
  • A travel direction indicator helps operators know which way to activate the travel levers.
  • Enjoy great visibility with the help of narrow cab pillars, large windows, the standard parallel roof wiper and washer, and a flat engine hood design.
  • A ground-level shutoff switch stops all fuel to the engine when activated and shuts down the machine.
  • Rearview and sideview cameras are 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.
  • 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.

  • Standard Equipment
  • Optional Equipment
  • Specs
  • Docs

Standard Equipment

  • NOTE
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
    • 6.9 m (22'8") Straight boom
  • CAB
    • ROPS, advanced sound suppression
    • High-resolution 254 mm (10") LCD touch screen monitor
    • Heated seat with air-adjustable suspension
    • Cat Product Link
    • Maintenance-free 1,000 CCA batteries (x2)
    • Centralized electrical disconnect switch
    • LED chassis light
    • Three selectable modes: Power, Smart, Eco
    • Auto engine speed control
    • 2300 m (7,546 ft) 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
    • Boom and stick regeneration circuit
    • Electronic main control valve
    • Heavy lift mode
    • Auto hydraulic oil warmup
    • Reverse swing damping valve
    • Auto swing parking brake
    • High performance hydraulic return filter
    • Two speed travel
    • Bio hydraulic oil capability
    • Caterpillar One Key security system
    • Lockable external tool / storage box
    • Lockable door, fuel and hydraulic tank locks
    • Lockable fuel drain compartment
    • Service platform with anti-skid plate and recessed bolts
    • Right-hand handrail and hand hold
    • Standard visibility mirror package
    • Signaling / warning horn
    • Ground-level secondary engine shutoff switch
    • Rear and sideview cameras
    • Boom lowering check valve
    • Stick lowering check valve
    • Grouped location of engine oil & fuel filters
    • Scheduled Oil Sampling (S.O.S) ports
    • Towing eye on base frame
    • 9.0 mt (19,842 lb) counterweight

Optional Equipment

  • NOTE
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
    • 3.2 m (10'6") Reach stick
    • 3.9 m (12'10") Reach stick
    • Premium surround lighting package
    • Cold start block heaters
    • Auto reverse fan
    • -32° C (-25° F) cold start capability
    • Smart Boom
    • Combined two-way auxiliary circuit with direct return
    • Medium-pressure auxiliary circuit
    • Cooling circuit
    • Quick coupler circuit for Cat Pin Grabber and CW Dedicated
    • Cat Command remote control
    • Integrated vehicle health management system
    • Swing alarm
    • 360 visibility
    • Preventative maintenance ready (Quick Evac™)
    • Electric refueling pump with auto shutoff
    • Long undercarriage
    • Long Narrow undercarriage
    • 600 mm (24") HD triple grouser track shoes
    • 700 mm (28") triple grouser track shoes
    • 850 mm (33") HD triple grouser track shoes



Long Name:
340 Straight Boom Excavator
340 Straight Boom


Engine Model
Engine Power - ISO 14396
314 HP / 234 kW
5 in / 115 mm
6 in / 149 mm
568 in³ / 9.3 l

Hydraulic System

Main System - Maximum Flow
558 l/min (147 gal/min)
Maximum Pressure - Equipment
5076 psi / 35000 kPa
Maximum Pressure - Equipment - Lift Mode
5511 psi / 38000 kPa
Maximum Pressure - Travel
5076 psi / 35000 kPa
Maximum Pressure - Swing
4264 psi / 29400 kPa

Swing Mechanism

Swing Speed
8.75 r/min / 8.75 r/min
Maximum Swing Torque
106228 ft·lbf / 144 kN·m


Operating Weight
88500 lb / 40200 kg
Note (1)
340 SB with R3.9 m DB stick (12' 10"), 2.27 m3 (2.97 yd3) GD bucket, long undercarriage with 600 mm (24") TG HD tracks

Service Refill Capacities

Fuel Tank Capacity
158.5 gal (US) / 600 l
Cooling System
10.5 gal (US) / 40 l
Engine Oil
8.5 gal (US) / 32 l
Swing Drive
4.8 gal (US) / 18 l
Final Drive - Each
2.1 gal (US) / 8 l
Hydraulic System - Including Tank
98.5 gal (US) / 373 l
Hydraulic Tank
42.5 gal (US) / 161 l
DEF Tank
21.1 gal (US) / 80 l


Note (1)
340 SB with R3.9 m DB stick (12' 10"), 2.27 m3 (2.97 yd3) GD bucket, long undercarriage with 600 mm (24") TG HD tracks
Shipping Height - Top of Cab
11 ft / 3360 mm
Shipping Length
37.4 ft / 11390 mm
Tail Swing Radius
11.6 ft / 3530 mm
Counterweight Clearance
4.1 ft / 1250 mm
Ground Clearance
1.7 ft / 520 mm
Track Length
16.5 ft / 5030 mm
Track Length to Center of Rollers
13.3 ft / 4040 mm
Track Gauge
8.5 ft / 2590 mm
Transport Width
10.5 ft / 3190 mm
Cab Height - With FOGS
11.5 ft / 3505.2 mm
Note (2)
600 mm (24") Track Shoe

Working Ranges and Forces

Maximum Pin Height at Stick Nose
45.2 ft / 13.77 m
Maximum Weight at Stick Nose
10570 lb / 4795 kg
Note (1)
340 SB with R3.9 m DB stick (12' 10"), 2.27 m3 (2.97 yd3) GD bucket, long undercarriage with 600 mm (24") TG HD tracks
Maximum Digging Depth
21.8 ft / 6650 mm
Maximum Cutting Height
45.2 ft / 13770 mm
Maximum Loading Height
33.6 ft / 10250 mm
Minimum Loading Height
11 ft / 3360 mm
Maximum Depth Cut for 2440 mm (8'0") Level Bottom
21.4 ft / 6520 mm
Maximum Vertical Wall Digging Depth
18.5 ft / 5640 mm
Bucket Digging Force -ISO
47150 lbf / 210 kN
Stick Digging Force - ISO
32440 lbf / 144 kN
Maximum Reach at Ground Level
40.5 ft / 12350 mm