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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.

Net Power - ISO 9249
172 HP
Operating Weight
49600 lb
Maximum Digging Depth
22.1 ft
Engine Model
Cat C4.4e TTA

Engine

Net Power - ISO 9249
172HP
Engine Model
Cat C4.4e TTA
Engine Power - ISO 14396
174HP
Bore
4in
Stroke
5in
Displacement
269in³

Weights

Operating Weight
49600lb

Working Ranges & Forces

Maximum Digging Depth
22.1ft
Boom
Reach 5.7 m (18'8")
Stick
Reach 2.9 m (9'6")
Bucket
1.19 m ³ (1.56 yd³)
Maximum Reach at Ground Level
32.4ft
Maximum Cutting Height
30.8ft
Maximum Loading Height
21.4ft
Minimum Loading Height
7.1ft
Maximum Depth Cut for 2440 mm (8 ft) Level Bottom
21.5ft
Maximum Vertical Wall Digging Depth
17ft
Bucket Digging Force - ISO
38811lbf
Stick Digging Force - ISO
23911lbf

Hydraulic System

Main System - Maximum Flow
429 l/min (113 gal/min)
Maximum Pressure - Equipment
5075psi
Maximum Pressure - Travel
4974psi
Maximum Pressure - Swing
3988psi

Swing Mechanism

Maximum Swing Torque
60300ft·lbf

Service Refill Capacities

Fuel Tank Capacity
86.6gal (US)
Cooling System
6.6gal (US)
Engine Oil
4gal (US)
Swing Drive - Each
3.2gal (US)
Final Drive - Each
1.3gal (US)
Hydraulic System - Including Tank
61.8gal (US)
Hydraulic Tank
30.4gal (US)
DEF Tank
10.3gal (US)

Dimensions

Boom
Reach 5.7 m (18'8")
Stick
Reach 2.9 m (9'6")
Bucket
1.19 m ³ (1.56 yd³)
Shipping Height - Top of Cab
9.8ft
Handrail Height
9.8ft
Shipping Length
31ft
Tail Swing Radius
9.3ft
Counterweight Clearance
3.4ft
Ground Clearance
1.6ft
Track Length
14.7ft
Length to Center of Rollers
12ft
Track Gauge
7.9ft
Transport Width
9.8ft

Standard Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Cab
    • 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 Technology
    • Cat Product Link
    • Remote Flash
    • Remote Troubleshoot
    • Cat Grade with 2D
    • Cat Assist
    • Cat Payload
    • E-Fence
  • Electrical System
    • Two 1,000 CCA maintenance-free batteries
    • Programmable time-delay LED working lights
    • LED chassis light, left-hand/right-hand boom lights, cab lights
  • Engine
    • 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
  • Hydraulic System
    • Boom and stick regeneration circuits
    • Auto warm up
    • Auto two-speed travel
    • Auto dig boost
    • Boom and stick drift reduction valve
  • Safety And Security
    • Rearview and right-side-view cameras
    • Ground-level engine shutoff switch
    • Right-hand handrail and hand hold
    • Signaling/warning horn
  • Service And Maintenance
    • Sampling ports for Scheduled Oil Sampling (S·O·S)
    • Ground-level and platform-level engine oil dipsticks
  • Undercarriage And Structures
    • Tie-down points on base frame

Optional Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Booms And Sticks
    • 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
  • Cab
    • Cat Stick Steer
    • Auxiliary relay
  • Cat Technology
    • Cat Grade with Advanced 2D
    • Cat Grade with 3D single GNSS
    • Cat Grade with 3D dual GNSS
  • Hydraulic System
    • 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
  • Safety And Security
    • Cat Detect People Detection
    • 360° visibility
    • Cat Command remote control
    • Swing alarm
    • Inspection lighting
  • Service And Maintenance
    • Integrated vehicle health management system
  • Undercarriage And Structures
    • 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

H120 S Hydraulic Hammer

Impact Energy Class
3500 ft·lbf
Blows per Minute
350-620
Maximum Operating Weight
4101 lb

H130 GC S Hammer

Impact Energy Class
4425 ft-lb
Blows per Minute
350-700
Maximum Operating Weight
5471.4 lb

H120 GC S Hammer

Impact Energy Class
2950 ft-lb
Blows per Minute
400-800
Maximum Operating Weight
3927 lb

GSH425-950-S

Capacity
1.25 yd³
Maximum Lift Capacity
22046 lb
Shell Type Options
Semi-open

GSH525-750

Capacity
1 yd³
Maximum Lift Capacity
22046 lb
Shell Type Options
Semi-open, Closed

GSH520-750

Capacity
1 yd³
Maximum Lift Capacity
17637 lb
Shell Type Options
Semi-open, Closed

GSH425-750-S

Capacity
1 yd³
Maximum Lift Capacity
22046 lb
Shell Type Options
Semi-open

GSH520-500

Capacity
0.65 yd³
Maximum Lift Capacity
17637 lb
Shell Type Options
Semi-open, Closed

GSH520-600

Capacity
0.75 yd³
Maximum Lift Capacity
17637 lb
Shell Type Options
Semi-open, Closed

GSH420-600-S

Capacity
0.75 yd³
Maximum Lift Capacity
17637 lb
Shell Type Options
Semi-open

GSH420-750-S

Capacity
1 yd³
Maximum Lift Capacity
17637 lb
Shell Type Options
Semi-open

GSH420-500-S

Capacity
0.65 yd³
Maximum Lift Capacity
17637 lb
Shell Type Options
Semi-open

S70 S Type Excavator Coupler: 566-2349

Weight
571 lb
Lifting Hook Capacity
8 ton (US)
Width
17.72 in

Heavy Duty Bucket 1050 mm (42 in)

Width
42 in
Capacity
1.31 yd³
Weight
1867 lb

Heavy Duty Bucket 1200 mm (48 in)

Width
48 in
Capacity
1.56 yd³
Weight
2030 lb

Specifications

Engine

Net Power - ISO 9249
172HP
Engine Model
Cat C4.4e TTA
Engine Power - ISO 14396
174HP
Bore
4in
Stroke
5in
Displacement
269in³

Weights

Operating Weight
49600lb

Working Ranges & Forces

Maximum Digging Depth
22.1ft
Boom
Reach 5.7 m (18'8")
Stick
Reach 2.9 m (9'6")
Bucket
1.19 m ³ (1.56 yd³)
Maximum Reach at Ground Level
32.4ft
Maximum Cutting Height
30.8ft
Maximum Loading Height
21.4ft
Minimum Loading Height
7.1ft
Maximum Depth Cut for 2440 mm (8 ft) Level Bottom
21.5ft
Maximum Vertical Wall Digging Depth
17ft
Bucket Digging Force - ISO
38811lbf
Stick Digging Force - ISO
23911lbf

Hydraulic System

Main System - Maximum Flow
429 l/min (113 gal/min)
Maximum Pressure - Equipment
5075psi
Maximum Pressure - Travel
4974psi
Maximum Pressure - Swing
3988psi

Swing Mechanism

Maximum Swing Torque
60300ft·lbf

Service Refill Capacities

Fuel Tank Capacity
86.6gal (US)
Cooling System
6.6gal (US)
Engine Oil
4gal (US)
Swing Drive - Each
3.2gal (US)
Final Drive - Each
1.3gal (US)
Hydraulic System - Including Tank
61.8gal (US)
Hydraulic Tank
30.4gal (US)
DEF Tank
10.3gal (US)

Dimensions

Boom
Reach 5.7 m (18'8")
Stick
Reach 2.9 m (9'6")
Bucket
1.19 m ³ (1.56 yd³)
Shipping Height - Top of Cab
9.8ft
Handrail Height
9.8ft
Shipping Length
31ft
Tail Swing Radius
9.3ft
Counterweight Clearance
3.4ft
Ground Clearance
1.6ft
Track Length
14.7ft
Length to Center of Rollers
12ft
Track Gauge
7.9ft
Transport Width
9.8ft

Standard/Optional Features

Standard Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Cab
    • 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 Technology
    • Cat Product Link
    • Remote Flash
    • Remote Troubleshoot
    • Cat Grade with 2D
    • Cat Assist
    • Cat Payload
    • E-Fence
  • Electrical System
    • Two 1,000 CCA maintenance-free batteries
    • Programmable time-delay LED working lights
    • LED chassis light, left-hand/right-hand boom lights, cab lights
  • Engine
    • 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
  • Hydraulic System
    • Boom and stick regeneration circuits
    • Auto warm up
    • Auto two-speed travel
    • Auto dig boost
    • Boom and stick drift reduction valve
  • Safety And Security
    • Rearview and right-side-view cameras
    • Ground-level engine shutoff switch
    • Right-hand handrail and hand hold
    • Signaling/warning horn
  • Service And Maintenance
    • Sampling ports for Scheduled Oil Sampling (S·O·S)
    • Ground-level and platform-level engine oil dipsticks
  • Undercarriage And Structures
    • Tie-down points on base frame

Optional Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Booms And Sticks
    • 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
  • Cab
    • Cat Stick Steer
    • Auxiliary relay
  • Cat Technology
    • Cat Grade with Advanced 2D
    • Cat Grade with 3D single GNSS
    • Cat Grade with 3D dual GNSS
  • Hydraulic System
    • 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
  • Safety And Security
    • Cat Detect People Detection
    • 360° visibility
    • Cat Command remote control
    • Swing alarm
    • Inspection lighting
  • Service And Maintenance
    • Integrated vehicle health management system
  • Undercarriage And Structures
    • 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

Attachments

H120 S Hydraulic Hammer

Impact Energy Class
3500 ft·lbf
Blows per Minute
350-620
Maximum Operating Weight
4101 lb

H130 GC S Hammer

Impact Energy Class
4425 ft-lb
Blows per Minute
350-700
Maximum Operating Weight
5471.4 lb

H120 GC S Hammer

Impact Energy Class
2950 ft-lb
Blows per Minute
400-800
Maximum Operating Weight
3927 lb

GSH425-950-S

Capacity
1.25 yd³
Maximum Lift Capacity
22046 lb
Shell Type Options
Semi-open

GSH525-750

Capacity
1 yd³
Maximum Lift Capacity
22046 lb
Shell Type Options
Semi-open, Closed

GSH520-750

Capacity
1 yd³
Maximum Lift Capacity
17637 lb
Shell Type Options
Semi-open, Closed

GSH425-750-S

Capacity
1 yd³
Maximum Lift Capacity
22046 lb
Shell Type Options
Semi-open

GSH520-500

Capacity
0.65 yd³
Maximum Lift Capacity
17637 lb
Shell Type Options
Semi-open, Closed

GSH520-600

Capacity
0.75 yd³
Maximum Lift Capacity
17637 lb
Shell Type Options
Semi-open, Closed

GSH420-600-S

Capacity
0.75 yd³
Maximum Lift Capacity
17637 lb
Shell Type Options
Semi-open

GSH420-750-S

Capacity
1 yd³
Maximum Lift Capacity
17637 lb
Shell Type Options
Semi-open

GSH420-500-S

Capacity
0.65 yd³
Maximum Lift Capacity
17637 lb
Shell Type Options
Semi-open

S70 S Type Excavator Coupler: 566-2349

Weight
571 lb
Lifting Hook Capacity
8 ton (US)
Width
17.72 in

Heavy Duty Bucket 1050 mm (42 in)

Width
42 in
Capacity
1.31 yd³
Weight
1867 lb

Heavy Duty Bucket 1200 mm (48 in)

Width
48 in
Capacity
1.56 yd³
Weight
2030 lb