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Medium Excavators
320 - Tier 3
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Net Power - ISO 9249
157 HP
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Net Power - ISO 9249 (DIN)
159 hp (metric)
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Engine Model
Cat C7.1
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Engine Power - ISO 14396
158 HP
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Engine Power - ISO 14396 (DIN)
160 hp (metric)
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Bore
4 in
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Stroke
5 in
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Displacement
428 in³
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Biodiesel Capability
Up to B20¹
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Emissions
Meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA.
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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 1,800 rpm. Advertised power is tested per the specified standard in effect at the time of manufacture.
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Note (2)
¹Cat engines are compatible with diesel fuel blended with the following lower-carbon intensity fuels** up to: 100% 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. *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.
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Main System - Maximum Flow
429 l/min (113 gal/min)
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Maximum Pressure - Equipment
5075 psi
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Maximum Pressure - Equipment - Lift Mode
5510 psi
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Maximum Pressure - Travel
4974 psi
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Maximum Pressure - Swing
3988 psi
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Swing Speed
11.3 r/min
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Maximum Swing Torque
60300 ft·lbf
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Operating Weight
47000 lb
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Note
Heavy Duty (HD) Reach boom, HD R2.9 (9'6") stick, HD 1.19 m³ (1.56 yd³) bucket, 600 mm (24") triple grouser shoes, and 3700 kg (8,200 lb) counterweight.
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Fuel Tank Capacity
86.6 gal (US)
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Cooling System
6.6 gal (US)
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Engine Oil
6.6 gal (US)
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Swing Drive - Each
1.6 gal (US)
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Final Drive - Each
1.3 gal (US)
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Hydraulic System - Including Tank
61.8 gal (US)
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Hydraulic Tank
30.4 gal (US)
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Boom
HD Reach 5.7 m (18'8")
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Stick
HD Reach 2.9 m (9'6")
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Bucket
HD 1.19 m³ (1.56 yd³)
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Shipping Height - Top of Cab
9.7 ft
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Handrail Height
9.8 ft
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Shipping Length
31.3 ft
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Tail Swing Radius
9.3 ft
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Counterweight Clearance
3.4 ft
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Ground Clearance
1.5 ft
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Track Length
14.7 ft
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Length to Center of Rollers
12 ft
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Track Gauge
7.8 ft
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Transport Width
9.8 ft
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Maximum Digging Depth
22 ft
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Maximum Reach at Ground Level
32.3 ft
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Maximum Cutting Height
30.7 ft
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Maximum Loading Height
21.3 ft
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Minimum Loading Height
7.1 ft
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Maximum Depth Cut for 2440 mm (8 ft) Level Bottom
21.5 ft
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Maximum Vertical Wall Digging Depth
17 ft
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Bucket Digging Force - ISO
33811 lbf
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Stick Digging Force - ISO
23911 ft·lbf
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