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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 new cab focused on operator comfort, plus lower fuel and maintenance costs, the 320 will set a new pace for productivity and profit in your operation.

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Net Power - ISO 9249172HP

Engine ModelCat C4.4e TTA

Engine Power - ISO 14396174HP




Operating Weight49600lb

Maximum Digging Depth22.1ft

BoomReach 5.7 m (18'8")

StickReach 2.9 m (9'6")

Bucket1.19 m ³ (1.56 yd³)

Maximum Reach at Ground Level32.4ft

Maximum Cutting Height30.8ft

Maximum Loading Height21.4ft

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 - Each3.2gal (US)

Final Drive - Each1.3gal (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 Cab9.8ft

Handrail Height9.8ft

Shipping Length31ft

Tail Swing Radius9.3ft

Counterweight Clearance3.4ft

Ground Clearance1.6ft

Track Length14.7ft

Length to Center of Rollers12ft

Track Gauge7.9ft

Transport Width9.8ft


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


Cat Product Link

Remote Flash

Remote Troubleshoot

Cat Grade with 2D

Cat Assist

Cat Payload



Cat Grade with Advanced 2D

Cat Grade with 3D single GNSS

Cat Grade with 3D dual GNSS


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

Biodiesel capability up to B20


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

Hammer return filter circuit

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

Medium-pressure circuit

Quick coupler circuit for Cat pin grabber


Rearview and right-side-view cameras

Ground-level engine shutoff switch

Right-hand handrail and hand hold

Signaling/warning horn


Cat Detect People Detection

360° visibility

Cat Command remote control

Swing alarm

Inspection lighting


Sampling ports for Scheduled Oil Sampling (S·O·S)

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

4.2 mt (9,300 lb) counterweight

4.7 mt (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

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