The Cat® M320 Wheel Excavator helps provide top performance with high swing torque to get the job done fast. With low maintenance costs, long service intervals, and 100 percent daily ground level check, the M320 helps save you time and money. A cab made for operator comfort helps keep you working quickly and efficiently.
Engine Power - ISO 14396 174 hp
Operating Weight Maximum 46740 lb
Maximum Travel Speed 21.7 mile/h
Engine Power - ISO 14396 (DIN) 176 hp (metric)
Biodiesel Capability Up to B20¹
Bore 4.1in
Displacement 268.5in³
Emissions Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
Engine Model Cat C4.4
Engine Power - ISO 14396 174hp
Engine Power - ISO 14396 (DIN) 176hp (metric)
Net Power - ISO 9249 171hp
Net Power - ISO 9249 (DIN) 174hp (metric)
Note (1) Net power advertised is the power available at the flywheel when the engine is equipped with fan, air cleaner, Clean Emission Module (CEM) exhaust gas aftertreatment, alternator, and cooling fan running at intermediate speed. Rated speed at 2,200 rpm. Adv
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
Stroke 5.3in
Note (1) Operating weight includes full fuel tank, operator, bucket 700 kg (1,543 lb) and dual pneumatic tires. Weight varies depending on configuration. Typical configurations include 2500 mm (8'2") stick, 3600 kg (7,937 lb) counterweight, bucket and 220 kg (485
Operating Weight Maximum 46740lb
Operating Weight Minimum 41450lb
Maximum Travel Speed 21.7mile/h
Main System - Maximum Flow - Implement 81gal/min
Maximum Pressure - Implement Circuit - Heavy Lift 5366psi
Maximum Pressure - Implement Circuit - Normal 5076psi
Maximum Pressure - Implement Circuit - Travel Circuit 5076psi
Maximum Swing Speed* 9.2r/min
Maximum Swing Torque 38722lbf·ft
Note (1) *For CE-marked machine default value may be set lower
Cooling System 8.4gal (US)
Diesel Exhaust Fluid (DEF) 7.9gal (US)
Fuel Tank 124.2gal (US)
Hydraulic System - Including Tank 71.3gal (US)
Hydraulic Tank 40.9gal (US)
Boom Variable Adjustable Boom 5260 mm (17'3")
Bucket GD 0.98 m³ (1.28 yd³)
Counterweight Clearance 4.3ft
Ground Clearance 1.4ft
Shipping Height - Top of Cab 11.1ft
Shipping Length 29.3ft
Stick 2500 mm (8'2")
Support Point 11.7ft
Tail Swing Radius 8.5ft
Undercarriage Length 16.6ft
Wheel Base 8.9ft
Boom Variable Adjustable Boom 5260 mm (17'3")
Bucket GD 0.98 m³ (1.28 yd³)
Bucket Forces (ISO) 30799lbf
Maximum Cutting Height 32.6ft
Maximum Digging Depth 19.8ft
Maximum Loading Height 22.8ft
Maximum Reach at Ground Line 30.5ft
Maximum Vertical Wall Digging Depth 13.9ft
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"). Force values are calculated with heavy lift on, a GD bucket (pin-on) and a tip radius of
Stick 2500 mm (8'2")
Stick Forces (ISO) 20682lbf
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 (1.9 lb) of refrigerant which has a CO2 equivalent of 1.216 metric tonnes (1.340 tons).
Standard and optional equipment may vary. Consult your Cat dealer for details.
Sound-suppressed ROPS cab
Keyless push-to-start engine control
Height-adjustable console, infinite with no tool
High-resolution 254 mm (10 in) LCD touchscreen monitor
VisionLink
Remote Flash and Remote Troubleshoot
LED lights on chassis (left-hand, right-hand) and counterweight
Programmable time-delay LED working lights
Roading and indicator lights, front and rear
Maintenance free batteries
Centralized electrical disconnect switch
Power Mode Selector
One-touch low idle with automatic engine speed control
Automatic engine idle shutdown
52°C (125°F) high-ambient cooling capacity
Cold start capability -18°C (0°F)
Double element air filter with integrated pre-cleaner
Boom, stick, and bucket drift reduction valves
Automatic hydraulic oil warm up
Heavy lift mode
Rear and right-side-view cameras
Wide angle mirrors
Lockable disconnect switch
Anti-skid plate and countersunk bolts on service platform
Signal/warning horn
Scheduled Oil Sampling (S·O·S℠) ports
Integrated vehicle health management system
Automatic brake/axle lock
All wheel drive
Standard and optional equipment may vary. Consult your Cat dealer for details.
5650 mm (18'6") One-piece boom
5260 mm (17'3") Variable Adjustable boom
2500 mm (8'2") stick
2900 mm (9'6") stick
Operator Protective Guards (OPG)
Cat Grade with 2D
Cat Grade with 2D with Attachment Ready Option (ARO)
Laser catcher
Cat Grade 3D ready
Cat Grade Connectivity
Cat Grade with Assist
Cat Payload
Cat Tiltrotator (TRS) Integration
Electrical refueling pump
Boom/stick lowering check valves
Bucket cylinder check valves
One-slider joysticks
Two-slider joysticks
Joystick steering
360° visibility
Inspection lighting
2D E-fence
Cab Avoidance
Automatic lubrication system for implement and swing system
10.00-20 16 PR, dual tires
11.00-20-16 PR, dual tires
315/70R22.5, no gap dual tires (Europe only)
445/70R 19.5, single tires
300-80-22.5 dual pneumatic, spacerless tire
3600 kg (7,937 lb) counterweight (Europe only)
4200 kg (9,260 lb) counterweight
