Get a quoteCat® 340 Straight Boom Excavator
Perfect for low-level demolition, sorting, and excavating.
More Comfort – More Performance – More Versatility
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High fuel efficiency
Leverage advanced engine and electrohydraulic control to help get more work done.
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Improved cab with more comfort and safety
Deluxe cab with ISO-certified ROPS protection makes for a safer, quieter work environment.
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Low maintenance costs
Extended maintenance intervals help increase uptime and reduce costs.
Engine
| 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 | 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 1,900 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 | 560 l/min (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 | 10741 lbf·ft |
| Swing Speed | 8.84 r/min |
Weights
| Note (1) | Long undercarriage, Straight boom, R3.9DB (12'10") stick, GD 2.27 m³ (2.97 yd³) bucket, 700 mm (28") triple grouser shoes, and 9.0 mt (19,800 lb) counterweight. |
| Operating Weight | 87800 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 | 4.8 gal (US) |
Dimensions
| Boom | Straight 6.9 m (22'8") |
| Bucket | GD 2.27 m³ (2.97 yd³) |
| Cab Height - With OPG | 11.4 ft |
| Counterweight Clearance | 4.2 ft |
| Ground Clearance | 1.7 ft |
| Shipping Height - Top of Cab | 11 ft |
| Shipping Length | 37.3 ft |
| Stick | Reach 3.9 m (12'10") |
| Tail Swing Radius | 11.6 ft |
| Track Gauge | 8.5 ft |
| Track Length | 16.5 ft |
| Track Length to Center of Rollers | 13.3 ft |
| Transport Width | 10.8 ft |
Working Ranges and Forces
| Boom | Straight 6.9 m (22'8") |
| Bucket | GD 2.27 m³ (2.97 yd³) |
| Bucket Digging Force -ISO | 47150 lbf |
| Maximum Cutting Height | 45.2 ft |
| Maximum Depth Cut for 2440 mm (8'0") Level Bottom | 21.4 ft |
| Maximum Digging Depth | 21.8 ft |
| Maximum Loading Height | 33.7 ft |
| Maximum Pin Height at Stick Nose | 39.4 ft |
| Maximum Reach at Ground Level | 40.5 ft |
| Maximum Vertical Wall Digging Depth | 18.5 ft |
| Maximum Weight at Stick Nose | 9170 lb |
| Minimum Loading Height | 11 ft |
| Stick | Reach 3.9 m (12'10") |
| Stick Digging Force - ISO | 32440 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 1.0 kg (2.2 lb) of refrigerant which has a CO2 equivalent of 1.430 metric tonnes (1.576 tons). |
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Engine
| 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 | 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 1,900 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 | 560 l/min (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 | 10741 lbf·ft |
| Swing Speed | 8.84 r/min |
Weights
| Note (1) | Long undercarriage, Straight boom, R3.9DB (12'10") stick, GD 2.27 m³ (2.97 yd³) bucket, 700 mm (28") triple grouser shoes, and 9.0 mt (19,800 lb) counterweight. |
| Operating Weight | 87800 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 | 4.8 gal (US) |
Dimensions
| Boom | Straight 6.9 m (22'8") |
| Bucket | GD 2.27 m³ (2.97 yd³) |
| Cab Height - With OPG | 11.4 ft |
| Counterweight Clearance | 4.2 ft |
| Ground Clearance | 1.7 ft |
| Shipping Height - Top of Cab | 11 ft |
| Shipping Length | 37.3 ft |
| Stick | Reach 3.9 m (12'10") |
| Tail Swing Radius | 11.6 ft |
| Track Gauge | 8.5 ft |
| Track Length | 16.5 ft |
| Track Length to Center of Rollers | 13.3 ft |
| Transport Width | 10.8 ft |
Working Ranges and Forces
| Boom | Straight 6.9 m (22'8") |
| Bucket | GD 2.27 m³ (2.97 yd³) |
| Bucket Digging Force -ISO | 47150 lbf |
| Maximum Cutting Height | 45.2 ft |
| Maximum Depth Cut for 2440 mm (8'0") Level Bottom | 21.4 ft |
| Maximum Digging Depth | 21.8 ft |
| Maximum Loading Height | 33.7 ft |
| Maximum Pin Height at Stick Nose | 39.4 ft |
| Maximum Reach at Ground Level | 40.5 ft |
| Maximum Vertical Wall Digging Depth | 18.5 ft |
| Maximum Weight at Stick Nose | 9170 lb |
| Minimum Loading Height | 11 ft |
| Stick | Reach 3.9 m (12'10") |
| Stick Digging Force - ISO | 32440 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 1.0 kg (2.2 lb) of refrigerant which has a CO2 equivalent of 1.430 metric tonnes (1.576 tons). |