320 Medium Hydraulic Excavator

NEW | 2026 CAT 320-0MYK51421

LISTING DETAILS

Model
320
Product Family
EXCAVATORS
Manufacturer
CAT
Year
2026
Serial Number
0MYK51421
Location
WAIPAHU, HI
Unit Number
H19640
Specs
View Specs
  • Standard Equipment
  • Optional Equipment
  • Specs
  • Docs

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
    • VisionLink™
    • Remote Flash
    • Remote Troubleshoot
    • Work tool recognition and tracking (PL161)
    • Cat Grade with 2D
    • Cat Assist
    • Cat Payload
  • 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
  • HYDRAULIC SYSTEM
    • Boom and stick regeneration circuits
    • Auto warm up
    • Auto two-speed travel
    • Auto dig boost
    • Auto heavy lift
    • Boom and stick drift reduction valve
  • SAFETY AND SECURITY
    • 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
  • SERVICE AND MAINTENANCE
    • Scheduled Oil Sampling (S·O·S℠) ports
    • Ground-level and platform-level engine oil dipsticks
    • Integrated vehicle health management system
  • 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') 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
    • Operator Protective Guards (OPG)
    • Cat Stick Steer
    • Auxiliary relay
  • CAT TECHNOLOGY
    • Operator Coaching
    • Cat Grade with 2D with Attachment Ready Option (ARO)
    • Cat Grade with 3D (single or dual GNSS)
    • Cat Grade 3D Ready
    • Cat Grade Connectivity
    • Cat Advanced Payload
    • Cat Tiltrotator (TRS) integration
  • HYDRAULIC SYSTEM
    • 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
  • SAFETY AND SECURITY
    • Cat Command (remote control)
    • 360° visibility
    • Swing alarm
    • Inspection lighting
  • 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
    • 4200 kg (9,300 lb) counterweight
    • 4700 kg (10,400 lb) counterweight

Specs

Overview

Long Name:
Cat® 320 Hydraulic Excavator
Name:
320
Brand:
Caterpillar
Status:
Current

Engine

Net Power - ISO 9249
172 hp / 128.5 kW
Net Power - ISO 9249 (DIN)
175 hp (metric) / 175 hp (metric)
Engine Model
Cat® C4.4
Engine Power - ISO 14396
174 hp / 129.4 kW
Engine Power - ISO 14396 (DIN)
176 hp (metric) / 176 hp (metric)
Bore
4 in / 105 mm
Stroke
5 in / 127 mm
Displacement
269 in³ / 4.4 l
Biodiesel Capability
Up to B20¹
Emissions
Meets 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 of manufacture.
Note (2)
¹Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) and are compatible* with 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. *While Caterpillar engines are compatible with these alternative fuels, some regions may not allow their use. **Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels. ***Engines with no aftertreatment devices are compatible with higher blends, up to 100% biodiesel (for use of blends higher than 20% biodiesel, consult your Cat dealer).

Hydraulic System

Main System - Maximum Flow
429 l/min (113 gal/min)
Maximum Pressure - Equipment
5075 psi / 35000 kPa
Maximum Pressure - Equipment - Lift Mode
5510 psi / 38000 kPa
Maximum Pressure - Travel
4974 psi / 34300 kPa
Maximum Pressure - Swing
3988 psi / 27500 kPa

Swing Mechanism

Swing Speed*
11.25 r/min / 11.25 r/min
Maximum Swing Torque
60300 lbf·ft / 82 kN·m
Note (1)
*For CE-marked machine default value may be set lower.

Weights

Operating Weight
49800 lb / 22600 kg
Note
Reach boom, R2.9 (9'6") stick, Heavy Duty (HD) 1.19 m³ (1.56 yd³) bucket 790 mm (31") triple grouser shoes, 4200 kg (10,400 lb) counterweight.

Service Refill Capacities

Fuel Tank Capacity
91.1 gal (US) / 345 l
Cooling System
6.6 gal (US) / 25 l
Engine Oil
4 gal (US) / 15 l
Swing Drive
1.6 gal (US) / 6 l
Final Drive - Each
1.1 gal (US) / 4 l
Hydraulic System - Including Tank
61.8 gal (US) / 234 l
Hydraulic Tank
30.4 gal (US) / 115 l
DEF Tank
10.3 gal (US) / 39 l

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
9.7 ft / 2960 mm
Handrail Height
9.7 ft / 2950 mm
Shipping Length
31.3 ft / 9530 mm
Tail Swing Radius
9.3 ft / 2830 mm
Counterweight Clearance
3.4 ft / 1050 mm
Ground Clearance
1.5 ft / 470 mm
Track Length
14.6 ft / 4450 mm
Length to Center of Rollers
11.7 ft / 3650 mm
Track Gauge
7.8 ft / 2380 mm
Transport Width
9.8 ft / 2980 mm

Working Ranges and Forces

Maximum Digging Depth
22 ft / 6720 mm
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
32.3 ft / 9860 mm
Maximum Cutting Height
30.7 ft / 9370 mm
Maximum Loading Height
21.3 ft / 6490 mm
Minimum Loading Height
7.1 ft / 2170 mm
Maximum Depth Cut for 2440 mm (8 ft) Level Bottom
21.5 ft / 6550 mm
Maximum Vertical Wall Digging Depth
17 ft / 5190 mm
Bucket Digging Force - ISO
31586 lbf / 141 kN
Stick Digging Force - ISO
23987 lbf / 107 kN

Air Conditioning System

Air Conditioning
The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf. See the label or instruction manual for identification of the gas. If equipped with 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). If equipped with R1234yf (Global Warming Potential = 0.5), the system contains 0.75 kg (1.7 lb) of refrigerant which has a CO2 equivalent of 0.001 metric tonnes (0.001 tons).

Sustainability

Recyclability
97%