Specification sheetIssued 4 November 2026
Cat · excavator
Cat 323
Cat 323 current (next) generation, Tier 3-equivalent build 07H (C7.1, Brazil MAR-1 = EPA Tier 3 / EU Stage IIIA) - the build Cat lists with an Africa/Middle East bucket table; long undercarriage, 5.7 m HD Reach boom, R2.9B1 stick, 1.30 m³ HD bucket, 600 mm shoes, 4.2 t counterweight.
UAEUSAGlobal
- digging depth
- 22'1"
- power
- 157 hp
- Operating weight
- 50,500 lb
- Bucket capacity
- 1.70 yd³
- Overall height (to top of cab)
- 9'9"
- Overall length
- 31'3"
- Upperframe width
- 9'1"
- Tail swing radius
- 9'3"
- Ground clearance, counterweight
- 3'5"
- Ground clearance (minimum)
- 1'7"
- Track length
- 14'7"
- Track length on ground
- 12'0"
- Track gauge
- 7'10"
- Overall width
- 9'9"
1
2
3
4
5
6
7
8
9
10
Dimensions
- Overall height (to top of boom)
- 10'4"
- Handrail height
- 9'8"
- Top of OPG height (with optional operator protective guard)
- 10'2"
- Overall width (790 mm shoes)
- 10'5"
- Shoe width (standard HD triple grouser)
- 24 in
- Shoe width (optional) (optional HD triple grouser)
- 31 in
Performance
- 1Max digging depth
- 22'1"
- 2Max reach at ground level
- 32'4"
- 3Max digging height
- 31'0"
- 4Max dumping height
- 21'3"
- 5Min loading height
- 7'1"
- 6Max depth cut for 2,440 mm level bottom
- 21'6"
- 7Max vertical wall digging depth
- 18'5"
- Bucket capacity (HD bucket)
- 1.70 yd³
- Bucket digging force
- 31,505 lbf
- Bucket digging force (Auto Dig Boost) (ISO)
- 34,205 lbf
- Arm digging force
- 23,962 lbf
- Arm digging force (Auto Dig Boost) (stick digging force, ISO)
- 26,016 lbf
- Swing speed (CE-marked machines may be set lower)
- 11.25 rpm
- Max swing torque
- 82 kN·m
- Travel speed (high) (maximum travel speed)
- 3.5 mph
- Max drawbar pull
- 45,861 lbf
- Gradeability
- 35°/70%
Weight
- Operating weight
- 50,500 lb
- Operating weight (5.4 t counterweight)
- 53,600 lb
- Ground pressure (4.2 t counterweight, 600 mm shoes)
- 47.6 kPa
- Counterweight (standard; 5.4 t optional)
- 9,300 lb
Engine
- Engine model
- Cat C7.1
- Emissions
- Meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA
- Net power (ISO 9249, at 1,800 rpm)
- 157 hp
- Net power (DIN) (ISO 9249 (DIN))
- 159 hp (metric)
- Gross power (ISO 14396)
- 158 hp
- Gross power (DIN) (ISO 14396 (DIN))
- 160 hp (metric)
- Bore
- 4 in
- Stroke
- 5 in
- Displacement
- 428 in³
- Biodiesel capability
- Up to B20
Hydraulics
- Pump flow
- 113 gal/min
- Max pressure (equipment, normal)
- 35 000 kPa
- Max pressure, equipment (heavy lift / Auto Dig Boost)
- 38 000 kPa
- Max pressure, travel
- 34 300 kPa
- Max pressure, swing
- 27 500 kPa
- Boom cylinder bore
- 5 in
- Boom cylinder stroke
- 50 in
- Stick cylinder bore
- 6 in
- Stick cylinder stroke
- 59 in
- Bucket cylinder bore
- 5 in
- Bucket cylinder stroke
- 43 in
Undercarriage
- Number of shoes (each side)
- 49
- Track rollers (each side)
- 8
- Carrier rollers (each side)
- 2
Service capacities
- Fuel tank
- 91.1 gal
- Cooling system
- 6.6 gal
- Engine oil
- 6.6 gal
- Swing drive
- 3.2 gal
- Final drive
- 1.3 gal
- Hydraulic system, with tank
- 61.8 gal
- Hydraulic tank
- 30.4 gal
Sound
- External sound (ISO 6395:2008)
- 100 dB(A)
- Operator sound (inside cab) (ISO 6396:2008)
- 70 dB(A)
Service intervals
- Engine oil and filter
- 1,000 hours
- Fuel filters
- 1,000 hours
- Swing drive oil (First change at 500 h)
- 1,000 hours
- Final drive oil (Each side; first change at 500 h)
- 2,000 hours
- Hydraulic return filter
- 3,000 hours
- Hydraulic oil
- 6,000 hours
- Coolant
- 12,000 hours
- Boom and stick linkage grease (Daily for the first 50 h)
- 500 hours
- Bucket linkage grease (Daily for the first 50 h)
- 100 hours