323 Hydraulic Excavator

The Cat® 323 moves more material faster with powerful hydraulics and standard Cat technologies for improved digging performance. Built for roadwork, heavy utility, and mass excavation, it helps reduce rework, lower fuel consumption, and cut cost per ton.

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Engine

Net Power - ISO 9249

172hp

Net Power - ISO 9249 (DIN)

175hp (metric)

Engine Model

Cat® C7.1

Engine Power - ISO 14396

174hp

Engine Power - ISO 14396 (DIN)

176hp (metric)

Bore

4in

Stroke

5in

Displacement

428in³

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

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

Weights

Operating Weight

55100lb

Note

Long undercarriage, Reach boom, R2.9 (9'6"), Reach stick, Heavy Duty (HD) 1.38 m³ (1.81 yd³) bucket, 790 mm (31") HD triple grouser track shoes and 5,400 kg (11,900 lb) counterweight.

Working Ranges and Forces

Maximum Digging Depth

22.1ft

Boom

Reach 5.7 m (18'8")

Stick

Reach 2.9 m (9'6")

Bucket

HD 1.30 m³ (1.71 yd³)

Maximum Reach at Ground Level

32.4ft

Maximum Cutting Height

31ft

Maximum Loading Height

21.3ft

Minimum Loading Height

7.1ft

Maximum Depth Cut for 2440 mm (8 ft) Level Bottom

21.5ft

Maximum Vertical Wall Digging Depth

18.8ft

Bucket Digging Force - ISO

31496lbf

Stick Digging Force - ISO

23987lbf

Hydraulic System

Main System - Maximum Flow

429 l/min (113 gal/min)

Maximum Pressure - Equipment

5075psi

Maximum Pressure - Equipment - Lift Mode

5510psi

Maximum Pressure - Travel

4974psi

Maximum Pressure - Swing

3988psi

Swing Mechanism

Swing Speed*

11.25r/min

Maximum Swing Torque

60300lbf·ft

Note (1)

*For CE-marked machine default value may be set lower.

Service Refill Capacities

Fuel Tank Capacity

91.1gal (US)

Cooling System

6.6gal (US)

Engine Oil

6.6gal (US)

Swing Drive

1.6gal (US)

Final Drive - Each

1.3gal (US)

Hydraulic System - Including Tank

61.8gal (US)

Hydraulic Tank

30.4gal (US)

DEF Tank

10.8gal (US)

Dimensions

Boom

Reach 5.7 m (18'8")

Stick

Reach 2.9 m (9'6")

Bucket

HD 1.30 m³ (1.71 yd³)

Shipping Height - Top of Cab

9.7ft

Handrail Height

9.7ft

Shipping Length

31.3ft

Tail Swing Radius

9.3ft

Counterweight Clearance

3.4ft

Ground Clearance

1.5ft

Track Length

14.6ft

Length to Center of Rollers

12ft

Track Gauge

7.8ft

Transport Width

10.4ft

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 conta

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 in) 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 7.1 single turbo diesel engine
- Three selectable power modes
- Automatic engine speed control
- 46°C (115°F) high-ambient cooling capacity (Europe only)
- 52°C (125°F) high-ambient cooling capacity
- -18°C (0°F) cold start capability
- Double element air filter with integrated precleaner
- Reversing electric cooling fans
Hydraulic System
- Boom and stick regeneration circuits
- Auto hydraulic warm up
- Auto two-speed travel
- Boom and stick drift reduction valve
- Auto dig boost
- Auto heavy lift
Safety And Security
- 2D E-Fence
- Auto hammer stop
- Rearview camera
- Right-side-view camera
- Lockable disconnect switch
- Ground-level engine shutoff switch
- Right-hand handrail and handhold
- Signaling/warning horn
Service And Maintenance
- Sampling ports for Scheduled Oil Sampling (S·O·S℠)
- Ground-level and platform-level engine oil dipsticks
- Integrated vehicle health management system
Undercarriage And Structures
- Long undercarriage
- 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
- 2.7 m (8'10") stub + 3.3 m (10'10") fore, Variable Angle 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
- 3.9 m (12'10") 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
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
Engine
- -32°C (-25°F) cold start capability
Hydraulic System
- Boom and stick lowering check valves
- SmartBoom^™ (Europe only)
- Hammer return filter circuit
- Advanced tool control (two pump, one/two way high-pressure flow)
- Hydraulic efficiency monitoring
- Medium-pressure circuit
- Quick coupler circuit for Cat Pin Grabber
Safety And Security
- Cat Command (remote control)
- 360° visibility
- Inspection lighting
Undercarriage And Structures
- 600 mm (24") single grouser shoes
- 600 mm (24") HD double grouser shoes
- 600 mm (24") HD triple grouser shoes
- 700 mm (28") HD triple grouser shoes
- 790 mm (31") HD triple grouser shoes
- 900 mm (35") HD triple grouser shoes

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