it's catit's single

320 Hydraulic Excavator

320 Hydraulic Excavator

The Cat® 320 raises the bar for efficiency and fuel economy in this size class. With the industry’s highest level of standard factory technology, a cab focused on operator comfort, plus low fuel and maintenance costs, the 320 will set a new pace for productivity and profit in your operation.

Request a Quote

Net Power - ISO 9249172HP

Net Power - ISO 9249 (DIN)175hp (metric)

Engine ModelCat C4.4

Engine Power - ISO 14396174HP

Engine Power - ISO 14396 (DIN)176hp (metric)




Biodiesel CapabilityUp to B20¹

EmissionsMeets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards.

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 2,200 rpm. Advertised power is tested per the specified standard in effect at the time

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

Operating Weight49800lb

NoteReach boom, R2.9 (9'6") stick, Heavy Duty (HD) 1.19 m ³ (1.56 yd³) bucket 790 mm (31") triple grouser shoes, 4200 kg (10,400 lb) counterweight.

Maximum Digging Depth22ft

BoomReach 5.7 m (18'8")

StickReach 2.9 m (9'6")

Bucket1.19 m ³ (1.56 yd³)

Maximum Reach at Ground Level32.3ft

Maximum Cutting Height30.7ft

Maximum Loading Height21.3ft

Minimum Loading Height7.1ft

Maximum Depth Cut for 2440 mm (8 ft) Level Bottom21.5ft

Maximum Vertical Wall Digging Depth17ft

Bucket Digging Force - ISO38811lbf

Stick Digging Force - ISO23911lbf

Main System - Maximum Flow429 l/min (113 gal/min)

Maximum Pressure - Equipment5075psi

Maximum Pressure - Travel4974psi

Maximum Pressure - Swing3988psi

Maximum Swing Torque60300ft·lbf

Fuel Tank Capacity86.6gal (US)

Cooling System6.6gal (US)

Engine Oil4gal (US)

Swing Drive - Each1.6gal (US)

Final Drive - Each1.1gal (US)

Hydraulic System - Including Tank61.8gal (US)

Hydraulic Tank30.4gal (US)

DEF Tank10.3gal (US)

BoomReach 5.7 m (18'8")

StickReach 2.9 m (9'6")

Bucket1.19 m ³ (1.56 yd³)

Shipping Height - Top of Cab9.7ft

Handrail Height9.7ft

Shipping Length31.3ft

Tail Swing Radius9.3ft

Counterweight Clearance3.4ft

Ground Clearance1.5ft

Track Length14.6ft

Length to Center of Rollers11.7ft

Track Gauge7.8ft

Transport Width9.8ft

Air ConditioningThe 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.


Standard and optional equipment may vary. Consult your Cat dealer for details.


Rollover protective structure (ROPS)

Air-adjustable seat with heat (Deluxe only)

Auto-adjustable seat with heat and air ventilation (Premium only)

High-resolution 254 mm (10 inch) LCD touchscreen monitor


Cat Stick Steer

Auxiliary relay



Remote Flash

Remote Troubleshoot

Cat Grade 2D

Cat Assist

Cat Payload


VisionLink Productivity

Cat Grade Connectivity

Cat Grade 2D with Attachment Ready Option (ARO)

Cat Grade 3D single GNSS

Cat Grade 3D dual GNSS

Cat Tilt Rotator (TRS) Integration

Operator Coaching


Two 1,000 CCA maintenance-free batteries

Programmable time-delay LED working lights

LED chassis light, left-hand/right-hand boom lights, cab lights


Cat C4.4 twin turbo diesel engine

Three selectable power modes

Automatic engine speed control

52°C (126°F) ambient cooling capacity

-32°C (-25°F) cold start capability

Double element air filter with integrated precleaner

Reversing electric cooling fans


Boom and stick regeneration circuits

Auto warm up

Auto two-speed travel

Auto dig boost

Boom and stick drift reduction valve


Boom and stick lowering check valves

SmartBoom (Europe only)

Hammer return filter circuit

Hydraulic efficiency monitoring

Advanced tool control (two pump, one/two way high-pressure flow)

Medium-pressure circuit

Quick coupler circuit for Cat pin grabber


2D E-Fence

Auto hammer stop

Rearview and right-side-view cameras

Ground-level engine shutoff switch

Lockable disconnect switch

Right-hand handrail and hand hold

Signaling/warning horn


Cat Command (remote control)

360° visibility

Swing alarm

Inspection lighting


Scheduled Oil Sampling (S·O·S℠) ports

Ground-level and platform-level engine oil dipsticks

Integrated vehicle health management system


Tie-down points on base frame


600 mm (24") triple grouser shoes

700 mm (28") triple grouser shoes

790 mm (31") triple grouser shoes

900 mm (35") triple grouser shoes

4200 kg (9,300 lb) counterweight

4700 kg (10,400 lb) counterweight


5.7 m (18'8") Reach boom

5.7 m (18'8") HD Reach boom

2.8 m (9'2") Stub + 3.3 m (10'10") Fore, VA boom

8.85 m (29'0") Super Long Reach boom

2.5 m (8'2") Reach stick

2.9 m (9'6") Reach stick

2.5 m (8'2") HD Reach stick

2.9 m (9'6") HD Reach stick

2.9 m (9'6") HD Thumb Ready Reach stick

6.28 m (20'7") Super Long Reach stick

View used options

See Available Used options



Complete this form to get a quote on the equipment you are interested in.

    This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

    What You Get: A phone call from a rep or agent. A cost estimate for your machine or the project. An in-person consultation if necessary.