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Medium Excavators
320 GC - Tier 3
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Net Power - ISO 9249
143 HP
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Net Power - ISO 9249 (DIN)
145 hp (metric)
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Engine Model
Cat C4.4
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Engine Power - ISO 14396
145 HP
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Engine Power - ISO 14396 (DIN)
147 hp (metric)
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Bore
4 in
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Stroke
5 in
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Displacement
269 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 2,000 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 - Travel
4974 psi
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Maximum Pressure - Swing
3625 psi
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Swing Speed
11.3 r/min
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Maximum Swing Torque
54900 lb/ft
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Operating Weight
45,000 lb
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Note
Medium undercarriage, Reach boom, R2.9 (9'6") stick, General Duty (GD) 1.0 m³ (1.31 yd³) bucket, 600 mm (24") triple grouser shoes, and 3.7 mt (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
4 gal (US)
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Swing Drive - Each
3.2 gal (US)
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Final Drive - Each
1.1 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
Reach 5.7 m (18'8")
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Stick
Reach 2.9 m (9'6")
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Bucket
1.0 m³ (1.31 yd³)
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Shipping Height - Top of Cab
9.9 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
13.9 ft
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Length to Center of Rollers
11.3 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
21.8 ft
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Maximum Reach at Ground Level
32.1 ft
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Maximum Cutting Height
31 ft
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Maximum Loading Height
21.6 ft
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Minimum Loading Height
7.4 ft
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Maximum Depth Cut for 2440 mm (8 ft) Level Bottom
21.2 ft
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Maximum Vertical Wall Digging Depth
19.7 ft
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Bucket Digging Force - ISO
29007 lbf
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Stick Digging Force - ISO
22301 lbf
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