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Cat® 340 Hydraulic Excavator

Cat® 340 Hydraulic Excavator

Quality, Reliability and Durability Come Standard.

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More Comfort – More Performance – More Versatility

  • Get More Work Done

    The 340 features high horsepower, a wide undercarriage, and a heavy counterweight, allowing larger work tools to handle substantial payloads and achieve exceptional production output.

  • Save Time and Resources

    Extended service intervals and industry-leading fuel efficiency mean you’ll spend more time working and less time and money on maintenance.

  • Easy-to-Use Technology

    Available technology enables operators of all skill levels to produce faster, better cuts and fills and more accurate payloads. Cat Grade and Payload enhance speed, accuracy, and operating efficiency. Cat E-Fence improves jobsite safety for you, your team, and others.


Biodiesel Capability Up to B20¹
Bore 5 in
Displacement 568 in³
Emissions Meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards.
Engine Model Cat C9.3B
Engine Power - ISO 14396 347 HP
Engine Power - ISO 14396 (DIN) 352 hp (metric)
Net Power - ISO 9249 346 HP
Net Power - ISO 9249 (DIN) 351 hp (metric)
Note (1) Net power advertised is the power available at the flywheel when the engine is equipped with fan, air intake system, exhaust system, and alternator with engine speed at 2,000 rpm. Advertised power is tested per the specified standard in effect at the time of manufacture.
Note (2) ¹Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels** up to: 20% biodiesel FAME (fatty acid methyl ester)* or 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or "Caterpillar Machine Fluids Recommendations" (SEBU6250) for details. *Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel (for use of blends higher than 20% biodiesel, consult your Cat dealer). **Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels.
Stroke 6 in

Hydraulic System

Main System - Maximum Flow 148 gal/min
Maximum Pressure - Equipment 5076 psi
Maximum Pressure - Equipment - Lift Mode 5511 psi
Maximum Pressure - Swing 4264 psi
Maximum Pressure - Travel 5076 psi

Swing Mechanism

Maximum Swing Torque 105214 ft·lbf
Swing Speed 8.84 r/min


Operating Weight 83100 lb

Service Refill Capacities

Cooling System 10.5 gal (US)
DEF Tank 21.1 gal (US)
Engine Oil 8.5 gal (US)
Final Drive - Each 2.1 gal (US)
Fuel Tank Capacity 158.5 gal (US)
Hydraulic System - Including Tank 98.5 gal (US)
Hydraulic Tank 42.5 gal (US)
Swing Drive - Each 4.8 gal (US)


Boom Reach 6.5 m (21'4")
Bucket HD 2.36 m³ (3.08 yd³)
Counterweight Clearance 4.2 ft
Ground Clearance 1.8 ft
Handrail Height 10.5 ft
Shipping Height - Top of Cab 10.5 ft
Shipping Length 36.8 ft
Stick Reach 3.9 m (12'10")
Tail Swing Radius 11.7 ft
Track Gauge 9 ft
Track Length 16.6 ft
Track Length to Center of Rollers 13.3 ft
Transport Width - 850 mm (33”) Shoes 11.9 ft

Working Ranges & Forces

Boom Reach 6.5 m (21'4")
Bucket HD 2.36 m³ (3.08 yd³)
Bucket Digging Force - ISO 47190 lbf
Maximum Cutting Height 35.3 ft
Maximum Depth Cut for 2440 mm (8 ft) Level Bottom 26.5 ft
Maximum Digging Depth 26.9 ft
Maximum Loading Height 24.5 ft
Maximum Reach at Ground Level 38.6 ft
Maximum Vertical Wall Digging Depth 21.1 ft
Minimum Loading Height 6.2 ft
Stick Reach 3.9 m (12'10")
Stick Digging Force - ISO 32480 lbf

Air Conditioning System

Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.00 kg of refrigerant, which has a CO2 equivalent of 1.430 metric tonnes.

Download resources

340 Excavator - Product Brochure (EU, Aus-NZ, N Am, South Korea, Turkey)
340 Excavator - Product Brochure (Japan)
340 Excavator - Technical Specifications (Europe)
340 Excavator - Technical Specifications (Japan)
340 Excavator -Technical Specifications (N Am)
340 Excavator -Technical Specifications (ANZ)
340 Excavator -Technical Specifications (Turkey)

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