With our huge inventory of new, used and rental equipment, WesTrac has the right machine for the job.
With our huge inventory of new, used and rental equipment, WesTrac has the right machine for the job.
Keep your operation working around the clock by making WesTrac your partner in parts. With over 75,000 product lines stocked in our warehouses, ready-to-go, we won't let you down.
The Cat® M320 Excavator maximizes performance with up to 16 percent more swing torque to get the job done faster. Save time and money with up to 10 percent overall savings in maintenance costs, longer service intervals, and 100 percent daily ground-level maintenance. Combined with a comfortable working environment, the M320 keeps you working quickly and efficiently.
The Cat® M320 Excavator maximizes performance with up to 16 percent more swing torque to get the job done faster. Save time and money with up to 10 percent overall savings in maintenance costs, longer service intervals, and 100 percent daily ground-level maintenance. Combined with a comfortable working environment, the M320 keeps you working quickly and efficiently.
Engine Power - ISO 14396:2002 | 129.4 kW | 174 hp |
Engine Power - ISO 14396 (DIN) | 176 hp (metric) | 176 hp (metric) |
Engine Model | C4.4 | C4.4 |
Net Power - ISO 9249 | 127.8 kW | 171 hp |
Net Power - ISO 9249 (DIN) | 174 hp (metric) | 174 hp (metric) |
Bore | 105 mm | 4 in |
Displacement | 4.4 l | 268.5 in³ |
Stroke | 135 mm | 5.3 in |
Biodiesel Capability | Up to B20¹ | Up to B20¹ |
Emissions | Meets U.S. EPA Tier 4 Final, EU Stage V, Japan 2014 emission standards. | Meets U.S. EPA Tier 4 Final, EU Stage V, Japan 2014 emission standards. |
Note (1) | Net power advertised is the power available at the flywheel when the engine is equipped with fan, air cleaner, CEM exhaust gas aftertreatment, alternator, and cooling fan 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 cleaner, CEM exhaust gas aftertreatment, alternator, and cooling fan with engine speed at 2,200 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. | 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. |
Transmission
Maximum Travel Speed | 35 km/h | 21.7 mile/h |
Hydraulic System
Main System - Maximum Flow - Implement | 306 l/min | 81 gal/min |
Maximum Pressure - Equipment | 37000 kPa | 5366 psi |
Maximum Pressure - Swing | 39500 kPa | 5729 gal/min |
Maximum Pressure - Travel | 35000 kPa | 5076 gal/min |
Machine Weight
Operating Weight Maximum | 21200 kg | 46740 lb |
Operating Weight Minimum | 18800 kg | 41450 lb |
Service Refill Capacities
Cooling System | 31.7 l | 8.4 gal (US) |
Diesel Exhaust Fluid (DEF) | 30 l | 7.9 gal (US) |
Hydraulic System - Including Tank | 270 l | 71.3 gal (US) |
Hydraulic Tank | 155 l | 40.9 gal (US) |
Final Drive | 2.5 l | 0.7 gal (US) |
Fuel Tank | 470 l | 124.2 gal (US) |
Dimensions
Boom | 5260 mm (17'3") | 5260 mm (17'3") |
Bucket | 0.98 m³ GD (1.28 yd³) | 0.98 m³ GD (1.28 yd³) |
Stick | 2.5 m (8' 2") | 2.5 m (8' 2") |
Shipping Height - Top of Cab | 3370 mm | 11 ft |
Shipping Length | 8925 mm | 29.3 ft |
Counterweight Clearance | 1306 mm | 4.3 ft |
Ground Clearance | 420 mm | 1.4 ft |
Support Point | 3580 mm | 11.8 ft |
Tail Swing Radius | 2600 mm | 8.5 ft |
Wheel Base | 2700 mm | 8.9 ft |
Working Ranges and Forces
Boom Type | VA Boom | VA Boom |
Bucket | 0.98 m³ GD (1.28 yd³) | 0.98 m³ GD (1.28 yd³) |
Stick | 2.5 m (8' 2") | 2.5 m (8' 2") |
Reach at Ground Level | 9290 mm | 30.5 ft |
Vertical Wall Digging Depth | 4230 mm | 13.9 ft |
Cutting Height | 9950 mm | 32.6 ft |
Bucket Forces (ISO) | 137 kN | 30799 lbf |
Stick Forces (ISO) | 92 kN | 20682 lbf |
Note (1) | Range values are with dual pneumatic tires (10.00-20). Range values are calculated with a GD bucket (CW) and CW-30 quick coupler with a tip radius of 1535 mm (5'0"). | Range values are with dual pneumatic tires (10.00-20). Range values are calculated with a GD bucket (CW) and CW-30 quick coupler with a tip radius of 1535 mm (5'0"). |
Swing Mechanism
Swing Speed | 9.2 r/min | 9.2 r/min |
Maximum Swing Torque | 50 kN·m | 37000 ft·lbf |
Air Conditioning System
Note | The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 0.85 kg of refrigerant which has a CO2 equivalent of 1.216 metric tonnes. | The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 0.85 kg of refrigerant which has a CO2 equivalent of 1.216 metric tonnes. |
NOTE
Standard and optional equipment may vary. Consult your Cat dealer for details. |
CAB
ROPS, sound suppression |
High-resolution 254 mm (10 in) LCD touchscreen monitor |
CAT TECHNOLOGY
VisionLink |
Remote Flash |
Remote Troubleshoot |
ELECTRICAL SYSTEM
LED lights on boom and cab |
LED lights on chassis (left-hand, right-hand) an counterweight |
Programmable time-delay LED working lights |
Roading and indicator lights, front and rear |
Maintenance free batteries |
Centralized electrical disconnect switch |
Electrical refueling pump |
ENGINE
Power Mode Selector |
One-touch low idle with auto engine speed control |
Auto engine idle shutdown |
52° C (125° F) high-ambient cooling capacity |
Cold start capability -18° C (0° F) |
Double element air filter with integrated precleaner |
Electric fuel priming pump |
On-demand electric cooling fans with autoreverse function |
HYDRAULIC SYSTEM
Automatic swing brake |
Auto hydraulic oil warm up |
Electronic main control valve |
Boom and stick drift reduction valves |
Heavy lift mode |
Quick coupler circuit |
Separate dedicated swing pump |
SAFETY AND SECURITY
Rear and side-view cameras |
Wide angle mirrors |
Ground-level engine shutoff switch |
Anti-skid plate and countersunk bolts on service platform |
Signaling/warning horn |
Inspection lighting |
2D E-Fence |
SERVICE AND MAINTENANCE
Sampling ports for Scheduled Oil Sampling (S-O-S) |
Integrated vehicle health management system |
UNDERCARRIAGE AND STRUCTURES
Automatic brake/axle lock |
All wheel drive |
NOTE
Standard and optional equipment may vary. Consult your Cat dealer for details. |
The Cat® M320 Excavator maximizes performance with up to 16 percent more swing torque to get the job done faster. Save time and money with up to 10 percent overall savings in maintenance costs, longer service intervals, and 100 percent daily ground-level maintenance. Combined with a comfortable working environment, the M320 keeps you working quickly and efficiently.
Engine Power - ISO 14396:2002 | 129.4 kW | 174 hp |
Engine Power - ISO 14396 (DIN) | 176 hp (metric) | 176 hp (metric) |
Engine Model | C4.4 | C4.4 |
Net Power - ISO 9249 | 127.8 kW | 171 hp |
Net Power - ISO 9249 (DIN) | 174 hp (metric) | 174 hp (metric) |
Bore | 105 mm | 4 in |
Displacement | 4.4 l | 268.5 in³ |
Stroke | 135 mm | 5.3 in |
Biodiesel Capability | Up to B20¹ | Up to B20¹ |
Emissions | Meets U.S. EPA Tier 4 Final, EU Stage V, Japan 2014 emission standards. | Meets U.S. EPA Tier 4 Final, EU Stage V, Japan 2014 emission standards. |
Note (1) | Net power advertised is the power available at the flywheel when the engine is equipped with fan, air cleaner, CEM exhaust gas aftertreatment, alternator, and cooling fan 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 cleaner, CEM exhaust gas aftertreatment, alternator, and cooling fan with engine speed at 2,200 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. | 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. |
Transmission
Maximum Travel Speed | 35 km/h | 21.7 mile/h |
Hydraulic System
Main System - Maximum Flow - Implement | 306 l/min | 81 gal/min |
Maximum Pressure - Equipment | 37000 kPa | 5366 psi |
Maximum Pressure - Swing | 39500 kPa | 5729 gal/min |
Maximum Pressure - Travel | 35000 kPa | 5076 gal/min |
Machine Weight
Operating Weight Maximum | 21200 kg | 46740 lb |
Operating Weight Minimum | 18800 kg | 41450 lb |
Service Refill Capacities
Cooling System | 31.7 l | 8.4 gal (US) |
Diesel Exhaust Fluid (DEF) | 30 l | 7.9 gal (US) |
Hydraulic System - Including Tank | 270 l | 71.3 gal (US) |
Hydraulic Tank | 155 l | 40.9 gal (US) |
Final Drive | 2.5 l | 0.7 gal (US) |
Fuel Tank | 470 l | 124.2 gal (US) |
Dimensions
Boom | 5260 mm (17'3") | 5260 mm (17'3") |
Bucket | 0.98 m³ GD (1.28 yd³) | 0.98 m³ GD (1.28 yd³) |
Stick | 2.5 m (8' 2") | 2.5 m (8' 2") |
Shipping Height - Top of Cab | 3370 mm | 11 ft |
Shipping Length | 8925 mm | 29.3 ft |
Counterweight Clearance | 1306 mm | 4.3 ft |
Ground Clearance | 420 mm | 1.4 ft |
Support Point | 3580 mm | 11.8 ft |
Tail Swing Radius | 2600 mm | 8.5 ft |
Wheel Base | 2700 mm | 8.9 ft |
Working Ranges and Forces
Boom Type | VA Boom | VA Boom |
Bucket | 0.98 m³ GD (1.28 yd³) | 0.98 m³ GD (1.28 yd³) |
Stick | 2.5 m (8' 2") | 2.5 m (8' 2") |
Reach at Ground Level | 9290 mm | 30.5 ft |
Vertical Wall Digging Depth | 4230 mm | 13.9 ft |
Cutting Height | 9950 mm | 32.6 ft |
Bucket Forces (ISO) | 137 kN | 30799 lbf |
Stick Forces (ISO) | 92 kN | 20682 lbf |
Note (1) | Range values are with dual pneumatic tires (10.00-20). Range values are calculated with a GD bucket (CW) and CW-30 quick coupler with a tip radius of 1535 mm (5'0"). | Range values are with dual pneumatic tires (10.00-20). Range values are calculated with a GD bucket (CW) and CW-30 quick coupler with a tip radius of 1535 mm (5'0"). |
Swing Mechanism
Swing Speed | 9.2 r/min | 9.2 r/min |
Maximum Swing Torque | 50 kN·m | 37000 ft·lbf |
Air Conditioning System
Note | The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 0.85 kg of refrigerant which has a CO2 equivalent of 1.216 metric tonnes. | The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 0.85 kg of refrigerant which has a CO2 equivalent of 1.216 metric tonnes. |
NOTE
Standard and optional equipment may vary. Consult your Cat dealer for details. |
CAB
ROPS, sound suppression |
High-resolution 254 mm (10 in) LCD touchscreen monitor |
CAT TECHNOLOGY
VisionLink |
Remote Flash |
Remote Troubleshoot |
ELECTRICAL SYSTEM
LED lights on boom and cab |
LED lights on chassis (left-hand, right-hand) an counterweight |
Programmable time-delay LED working lights |
Roading and indicator lights, front and rear |
Maintenance free batteries |
Centralized electrical disconnect switch |
Electrical refueling pump |
ENGINE
Power Mode Selector |
One-touch low idle with auto engine speed control |
Auto engine idle shutdown |
52° C (125° F) high-ambient cooling capacity |
Cold start capability -18° C (0° F) |
Double element air filter with integrated precleaner |
Electric fuel priming pump |
On-demand electric cooling fans with autoreverse function |
HYDRAULIC SYSTEM
Automatic swing brake |
Auto hydraulic oil warm up |
Electronic main control valve |
Boom and stick drift reduction valves |
Heavy lift mode |
Quick coupler circuit |
Separate dedicated swing pump |
SAFETY AND SECURITY
Rear and side-view cameras |
Wide angle mirrors |
Ground-level engine shutoff switch |
Anti-skid plate and countersunk bolts on service platform |
Signaling/warning horn |
Inspection lighting |
2D E-Fence |
SERVICE AND MAINTENANCE
Sampling ports for Scheduled Oil Sampling (S-O-S) |
Integrated vehicle health management system |
UNDERCARRIAGE AND STRUCTURES
Automatic brake/axle lock |
All wheel drive |
NOTE
Standard and optional equipment may vary. Consult your Cat dealer for details. |