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323 Hydraulic Excavator

The Cat® 323 delivers power, speed, and high production performance. With more standard technology than previous models, plus reduced fuel and maintenance costs, the Cat 323 has all you need to take your business to the next level.

Net Power - ISO 9249
172 HP
Operating Weight
55100 lb
Maximum Digging Depth
22.1 ft
Net Power - ISO 9249 (DIN)
175 hp (metric)

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) or ULSD blended with the following lower-carbon intensity fuels** up to: 20% biodiesel FAME (fatty acid methyl ester)* or 100% renewable diesel, HVO

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 & 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
34308lbf
Stick Digging Force - ISO
26094lbf

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

Swing Speed
11.25r/min
Maximum Swing Torque
60300ft·lbf

Service Refill Capacities

Fuel Tank Capacity
86.6gal (US)
Cooling System
6.6gal (US)
Engine Oil
6.6gal (US)
Swing Drive - Each
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 (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).

Sustainability

Recyclability
98%

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
    • Cat Grade 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
    • 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 (Chile, Turkey only)
    • 2.9 m (9'6") HD Reach stick (Chile, Turkey only)
    • 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
    • Cat Stick Steer
  • Cat Technology
    • 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
  • 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
    • 4200 kg (9,300 lb) counterweight

Severe Duty Bucket 1200 mm (48 in)

Width
48 in
Capacity
1.56 yd³
Weight
2170 lb

Severe Duty Bucket 1050 mm (42 in)

Width
42 in
Capacity
1.31 yd³
Weight
1991 lb

Severe Duty Bucket 900 mm (36 in)

Width
36 in
Capacity
1.06 yd³
Weight
1851 lb

Severe DutyP Bucket 900 mm (36 in)

Width
36 in
Capacity
1.03 yd³
Weight
1781 lb

Severe Duty Bucket 750 mm (30 in)

Width
30 in
Capacity
0.84 yd³
Weight
1673 lb

Severe Duty Bucket 600 mm (24 in)

Width
24 in
Capacity
0.6 yd³
Weight
1446 lb

Heavy Duty-Pin Grabber Performance Bucket 1350 mm (54 in)

Width
54 in
Capacity
1.67 yd³
Weight
2335 lb

Heavy Duty Bucket 1350 mm (54 in)

Width
54 in
Capacity
1.81 yd³
Weight
2197 lb

Heavy Duty-Pin Grabber Performance Bucket 1200 mm (48 in)

Width
48 in
Capacity
1.45 yd³
Weight
2153 lb

Heavy DutyP Bucket 1200 mm (48 in)

Width
48 in
Capacity
1.49 yd³
Weight
2048 lb

Heavy Duty Bucket 1200 mm (48 in)

Width
48 in
Capacity
1.56 yd³
Weight
2030 lb

Heavy Duty-Pin Grabber Performance Bucket 1050 mm (42 in)

Width
42 in
Capacity
1.22 yd³
Weight
1973 lb

Heavy DutyP Bucket 1050 mm (42 in)

Width
42 in
Capacity
1.26 yd³
Weight
1880 lb

Heavy Duty Bucket 1050 mm (42 in)

Width
42 in
Capacity
1.31 yd³
Weight
1867 lb

Heavy Duty-Pin Grabber Performance Bucket 900 mm (36 in)

Width
36 in
Capacity
1 yd³
Weight
1831 lb

Heavy Duty Bucket 900 mm (36 in)

Width
36 in
Capacity
1.06 yd³
Weight
1742 lb

Heavy Duty-Pin Grabber Performance Bucket 750 mm (30 in)

Width
30 in
Capacity
0.79 yd³
Weight
1655 lb

Heavy Duty Bucket 750 mm (30 in)

Width
30 in
Capacity
0.84 yd³
Weight
1578 lb

Heavy Duty-Pin Grabber Performance Bucket 600 mm (24 in)

Width
24 in
Capacity
0.57 yd³
Weight
1444 lb

General Duty Bucket 1350 mm (54 in)

Width
54 in
Capacity
2.08 yd³
Weight
2104 lb

General Duty Bucket 1200 mm (48 in)

Width
48 in
Capacity
1.8 yd³
Weight
1947 lb

General Duty Bucket 1050 mm (42 in)

Width
42 in
Capacity
1.52 yd³
Weight
1792 lb

General Duty Bucket 900 mm (36 in)

Width
36 in
Capacity
1.24 yd³
Weight
1671 lb

General Duty Bucket 750 mm (30 in)

Width
30 in
Capacity
0.98 yd³
Weight
1519 lb

General Duty Bucket 600 mm (24 in)

Width
24 in
Capacity
0.6 yd³
Weight
1366 lb

General Duty Bucket 600 mm (24 in)

Width
24 in
Capacity
0.72 yd³
Weight
1321 lb

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

GSH525-750

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

GSH525-950

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

GSH425-950-S

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

GSH425-750-S

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

GSH520-750

Capacity
1 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

GSH520-500

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

GSH420-750-S

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

GSH420-600-S

Capacity
0.75 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

Specifications

Standard/Optional Features

Attachments