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Metric | Imperial
Cat 320 GC Hydraulic Excavator
Medium Excavators
320 GC
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Cat 320 Hydraulic Excavator
Medium Excavators
320
Change product
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Cat 320 Hydraulic Excavator
Medium Excavators
320
Change product
GET A QUOTE Download
Engine Expand Collapse
Net Power - ISO 9249
143 hp 107 kW
172 hp 128.5 kW
157 hp 117 kW
Net Power - ISO 9249 (DIN)
145 hp (metric) 145 hp (metric)
175 hp (metric) 175 hp (metric)
159 hp (metric) 159 hp (metric)
Engine Model
Cat® C4.4
Cat® C4.4
Cat® C7.1
Engine Power - ISO 14396
145 hp 108 kW
174 hp 129.4 kW
158 hp 118 kW
Engine Power - ISO 14396 (DIN)
147 hp (metric) 147 hp (metric)
176 hp (metric) 176 hp (metric)
160 hp (metric) 160 hp (metric)
Bore
4 in 105 mm
4 in 105 mm
4 in 105 mm
Stroke
5 in 127 mm
5 in 127 mm
5 in 135 mm
Displacement
269 in³ 4.4 l
269 in³ 4.4 l
428 in³ 7.01 l
Biodiesel Capability
Up to B20¹
Up to B20¹
Up to B20¹
Emissions
Meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA.
Meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards.
Meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA.
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.
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 2,200 rpm. Advertised power is tested per the specified standard in effect at the time of manufacture.
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.
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.
¹Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) and are compatible* with 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. *While Caterpillar engines are compatible with these alternative fuels, some regions may not allow their use. **Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels. ***Engines with no aftertreatment devices are compatible with higher blends, up to 100% biodiesel (for use of blends higher than 20% biodiesel, consult your Cat dealer).
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.
Main System - Maximum Flow
429 l/min (113 gal/min)
429 l/min (113 gal/min)
429 l/min (113 gal/min)
Maximum Pressure - Equipment
5075 psi 35000 kPa
5075 psi 35000 kPa
5075 psi 35000 kPa
Maximum Pressure - Travel
4974 psi 34300 kPa
4974 psi 34300 kPa
4974 psi 34300 kPa
Maximum Pressure - Swing
3625 psi 25000 kPa
3988 psi 27500 kPa
3988 psi 27500 kPa
Air Conditioning
The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 0.85 kg (1.9 lb) of refrigerant which has a CO2 equivalent of 1.216 metric tonnes (1.340 tons).
The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf. See the label or instruction manual for identification of the gas. If equipped with R134a (Global Warming Potential = 1430), the system contains 0.85 kg (1.9 lb) of refrigerant which has a CO2 equivalent of 1.216 metric tonnes (1.340 tons). If equipped with R1234yf (Global Warming Potential = 0.5), the system contains 0.75 kg (1.7 lb) of refrigerant which has a CO2 equivalent of 0.001 metric tonnes (0.001 tons).
The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 0.85 kg (1.9 lb) of refrigerant which has a CO2 equivalent of 1.216 metric tonnes (1.340 tons).
Swing Speed*
11.3 r/min 11.3 r/min
11.25 r/min 11.25 r/min
11.3 r/min 11.3 r/min
Maximum Swing Torque
54900 lbf·ft 74.4 kN·m
60300 lbf·ft 82 kN·m
60300 lbf·ft 82 kN·m
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.
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 2,200 rpm. Advertised power is tested per the specified standard in effect at the time of manufacture.
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.
Operating Weight
45,000 lb 20400 kg
49,800 lb 22600 kg
47000 lb 21300 kg
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.
Reach boom, R2.9 (9'6") stick, Heavy Duty (HD) 1.19 m³ (1.56 yd³) bucket 790 mm (31") triple grouser shoes, 4200 kg (10,400 lb) counterweight.
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.
Fuel Tank Capacity
91.1 gal (US) 345 l
91.1 gal (US) 345 l
91.1 gal (US) 345 l
Cooling System
6.6 gal (US) 25 l
6.6 gal (US) 25 l
6.6 gal (US) 25 l
Engine Oil
4 gal (US) 15 l
4 gal (US) 15 l
6.6 gal (US) 25 l
Swing Drive
3.2 gal (US) 12 l
1.6 gal (US) 6 l
1.6 gal (US) 6 l
Final Drive - Each
1.1 gal (US) 4 l
1.1 gal (US) 4 l
1.3 gal (US) 5 l
Hydraulic System - Including Tank
61.8 gal (US) 234 l
61.8 gal (US) 234 l
61.8 gal (US) 234 l
Hydraulic Tank
30.4 gal (US) 115 l
30.4 gal (US) 115 l
30.4 gal (US) 115 l
Boom
Reach 5.7 m (18'8")
Reach 5.7 m (18'8")
HD Reach 5.7 m (18'8")
Stick
Reach 2.9 m (9'6")
Reach 2.9 m (9'6")
HD Reach 2.9 m (9'6")
Bucket
1.0 m³ (1.31 yd³)
1.19 m ³ (1.56 yd³)
HD 1.19 m³ (1.56 yd³)
Shipping Height - Top of Cab
9.9 ft 2960 mm
9.7 ft 2960 mm
9.7 ft 2960 mm
Handrail Height
9.8 ft 2950 mm
9.7 ft 2950 mm
9.8 ft 2950 mm
Shipping Length
31.3 ft 9530 mm
31.3 ft 9530 mm
31.3 ft 9530 mm
Tail Swing Radius
9.3 ft 2830 mm
9.3 ft 2830 mm
9.3 ft 2830 mm
Counterweight Clearance
3.4 ft 1050 mm
3.4 ft 1050 mm
3.4 ft 1050 mm
Ground Clearance
1.5 ft 470 mm
1.5 ft 470 mm
1.5 ft 470 mm
Track Length
13.9 ft 4250 mm
14.6 ft 4450 mm
14.7 ft 4450 mm
Length to Center of Rollers
11.3 ft 3450 mm
11.7 ft 3650 mm
12 ft 3650 mm
Track Gauge
7.8 ft 2380 mm
7.8 ft 2380 mm
7.8 ft 2380 mm
Transport Width
9.8 ft 2980 mm
9.8 ft 2980 mm
9.8 ft 2980 mm
Maximum Digging Depth
21.8 ft 6630 mm
22 ft 6720 mm
22 ft 6720 mm
Boom
Reach 5.7 m (18'8")
Reach 5.7 m (18'8")
HD Reach 5.7 m (18'8")
Stick
Reach 2.9 m (9'6")
Reach 2.9 m (9'6")
HD Reach 2.9 m (9'6")
Bucket
1.0 m³ (1.31 yd³)
1.19 m ³ (1.56 yd³)
HD 1.19 m³ (1.56 yd³)
Maximum Reach at Ground Level
32.1 ft 9770 mm
32.3 ft 9860 mm
32.3 ft 9860 mm
Maximum Cutting Height
31 ft 9440 mm
30.7 ft 9370 mm
30.7 ft 9370 mm
Maximum Loading Height
21.6 ft 6580 mm
21.3 ft 6490 mm
21.3 ft 6490 mm
Minimum Loading Height
7.4 ft 2260 mm
7.1 ft 2170 mm
7.1 ft 2170 mm
Maximum Depth Cut for 2440 mm (8 ft) Level Bottom
21.2 ft 6460 mm
21.5 ft 6550 mm
21.5 ft 6550 mm
Maximum Vertical Wall Digging Depth
19.7 ft 6010 mm
17 ft 5190 mm
17 ft 5190 mm
Bucket Digging Force - ISO
29007 lbf 129 kN
31586 lbf 141 kN
33811 lbf 150 kN
Stick Digging Force - ISO
22301 lbf 99 kN
23987 lbf 107 kN
23911 ft·lbf 106 kN
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