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303 CR Mini Hydraulic Excavator

303 CR Mini Hydraulic Excavator

Mini Excavators Inspired by Our Customers

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More Comfort – More Performance – More Versatility

  • 4 Industry First Features

    Cat Exclusives in a Mini Excavator

  • Up to 5% Lower Total Ownership Costs

    with more common parts, lower repair costs and tilt up cab

  • Up to 10% More Performance

    with programmable operator settings and faster cyle times

Engine

Bore 3 in
Displacement 69 in³
Emissions Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
Engine Model C1.1 Turbo
Net Power 23.6 hp
Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC 23.6 hp
Net Power - ISO 9249 24.7 hp
Note Advertised power is tested per the specified standard in effect at the time of manufacture.
Note (1) Net power advertised is the power available at the flywheel when the engine is at the rated speed of 2,400 rpm and the engine is installed with the factory configured fan, air intake system, exhaust system and alternator with a minimum alternator load.
Stroke 3.2 in

Weights

EU: CE Plate Weight with Cab*** 7012 lb
EU: CE Plate Weight with Canopy*** 6791 lb
Maximum Operating Weight with Cab** 7817 lb
Maximum Operating Weight with Canopy** 7552 lb
Minimum Operating Weight with Cab* 6924 lb
Minimum Operating Weight with Canopy* 6670 lb
Note (1) *Minimum Weight is based on fixed rubber tracks, operator, full fuel tank, standard stick, blade, no bucket and extra counterweight.
Note (2) **Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, blade, no bucket and extra counterweight.
Note (3) ***CE Plate Weight is based on the most common EU configuration. Includes 75 kg (165 lb) operator and full fuel tank and excludes bucket.
Operating Weight 7817 lb

Weight Increase from Minimum Configuration

Cab 254 lb
Counterweight 221 lb
Extra Counterweight 551 lb
Long Stick 55 lb
Steel Tracks 276 lb

Travel System

Gradeability - Maximum 30 degrees
Ground Pressure - Maximum Weight 4.7 psi
Ground Pressure - Minimum Weight 4 psi
Maximum Traction Force - High Speed 3305 lbf
Maximum Traction Force - Low Speed 7059 lbf
Travel Speed - High 2.8 mile/h
Travel Speed - Low 1.6 mile/h

Service Refill Capacities

Cooling System 1.1 gal (US)
Engine Oil 1.1 gal (US)
Fuel Tank 11.9 gal (US)
Hydraulic System 9.2 gal (US)
Hydraulic Tank 4.8 gal (US)

Hydraulic System

Auxiliary Circuit - Primary - Flow 17 gpm
Auxiliary Circuit - Primary - Pressure 3553 psi
Auxiliary Circuit - Secondary - Flow 7 gpm
Auxiliary Circuit - Secondary - Pressure 3553 psi
Digging Force - Bucket 6385 lbf
Digging Force - Stick - Long 3327 lbf
Digging Force - Stick - Standard 3732 lbf
Note * Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Operating Pressure - Equipment 3553 psi
Operating Pressure - Swing 2553 psi
Operating Pressure - Travel 3553 psi
Pump Flow at 2,400 rpm 26 gpm
Type Load Sensing Hydraulics with Variable Displacement Piston Pump

Swing System

Boom Swing - Left 75 °
Boom Swing - Right 50 °
Machine Swing Speed 9 r/min

Blade

Height 13.8 in
Width 61 in

Certification - Cab and Canopy

Roll Over Protective Structure (ROPS) ISO 12117-2:2008
Tip Over Protective Structure (TOPS) ISO 12117:1997
Top Guard ISO 10262:1998 (Level I)

Dimensions - Standard Stick

Boom Height - Shipping Position 63 in
Boom In Reach 68.9 in
Boom Swing - Left 25.2 in
Boom Swing - Right 34.3 in
Dig Depth 104.3 in
Maximum Blade Depth 21.1 in
Maximum Blade Height 15.2 in
Maximum Dig Height 177.6 in
Maximum Dump Clearance 124.8 in
Maximum Reach 196.1 in
Maximum Reach - Ground Level 190.2 in
Minimum Ground Clearance Below Undercarriage 12.2 in
Note *Overall Shipping Length depends on blade position during shipment.
O/A Shipping Height 97.6 in
O/A Undercarriage Length 81.5 in
Overall Shipping Length* 177.6 in
Stick Length 49.6 in
Swing Bearing - Height 22.4 in
Tail Swing with Extra Counterweight 35 in
Tail Swing without Counterweight 30.5 in
Track Belt/Shoe Width 11.8 in
Vertical Wall 71.7 in

Dimensions - Long Stick

Boom Height - Shipping Position 75.6 in
Boom In Reach 74.2 in
Boom Swing - Left 25.2 in
Boom Swing - Right 34.3 in
Dig Depth 116.1 in
Maximum Blade Depth 21.1 in
Maximum Blade Height 15.2 in
Maximum Dig Height 183.1 in
Maximum Dump Clearance 130.3 in
Maximum Reach 206.3 in
Maximum Reach - Ground Level 201.2 in
Minimum Ground Clearance Below Undercarriage 12.2 in
Note *Overall Shipping Length depends on blade position during shipment.
O/A Shipping Height 97.6 in
O/A Undercarriage Length 81.5 in
Overall Shipping Length* 179.5 in
Stick Length 61.4 in
Swing Bearing - Height 22.4 in
Tail Swing - with Extra Counterweight 35 in
Tail Swing without Counterweight 30.5 in
Track Belt/Shoe Width 11.8 in
Track Width 61 in
Vertical Wall 81.5 in

Air Conditioning System

Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf (Europe) (Global Warming Potential = 1430). See label or instruction manual for gas refrigerant identification. The system contains 0.75 kg (1.65 lb), 0.90 kg (1.98 lb) or 1.0 kg (2.20 lb) of refrigerant which has a CO2 equivalent of 1.430 metric tonnes (1.576 tons) for R134a and 0.001 tonnes (0.001 tons) for R1234yf (Europe).

Sound

Average Exterior Sound Pressure (ISO 6395:2008) 94 dB(A)
Note European Union Directive “2000/14/EC”
Operator Sound Pressure (ISO 6396:2008) 78 dB(A)

Sustainability

Recyclability 95%

Download resources

303 CR Small Product Brochure (Global except China and Japan)
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Cat Mini Hydraulic Excavators Product Line Brochure (North America)
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Cat Mini Hydraulic Excavators Product Line Brochure (Europe)
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Options And Accessories Kit Guide for Mini Hydraulic Excavators
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Attachment Compatibility Guide for Mini Excavators
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Cat Attachments for Mini Excavators Brochure
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Engine

Bore 3 in
Displacement 69 in³
Emissions Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
Engine Model C1.1 Turbo
Net Power 23.6 hp
Net Power - 2,400 rpm - ISO 9249, 80/1269/EEC 23.6 hp
Net Power - ISO 9249 24.7 hp
Note Advertised power is tested per the specified standard in effect at the time of manufacture.
Note (1) Net power advertised is the power available at the flywheel when the engine is at the rated speed of 2,400 rpm and the engine is installed with the factory configured fan, air intake system, exhaust system and alternator with a minimum alternator load.
Stroke 3.2 in

Weights

EU: CE Plate Weight with Cab*** 7012 lb
EU: CE Plate Weight with Canopy*** 6791 lb
Maximum Operating Weight with Cab** 7817 lb
Maximum Operating Weight with Canopy** 7552 lb
Minimum Operating Weight with Cab* 6924 lb
Minimum Operating Weight with Canopy* 6670 lb
Note (1) *Minimum Weight is based on fixed rubber tracks, operator, full fuel tank, standard stick, blade, no bucket and extra counterweight.
Note (2) **Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, blade, no bucket and extra counterweight.
Note (3) ***CE Plate Weight is based on the most common EU configuration. Includes 75 kg (165 lb) operator and full fuel tank and excludes bucket.
Operating Weight 7817 lb

Weight Increase from Minimum Configuration

Cab 254 lb
Counterweight 221 lb
Extra Counterweight 551 lb
Long Stick 55 lb
Steel Tracks 276 lb

Travel System

Gradeability - Maximum 30 degrees
Ground Pressure - Maximum Weight 4.7 psi
Ground Pressure - Minimum Weight 4 psi
Maximum Traction Force - High Speed 3305 lbf
Maximum Traction Force - Low Speed 7059 lbf
Travel Speed - High 2.8 mile/h
Travel Speed - Low 1.6 mile/h

Service Refill Capacities

Cooling System 1.1 gal (US)
Engine Oil 1.1 gal (US)
Fuel Tank 11.9 gal (US)
Hydraulic System 9.2 gal (US)
Hydraulic Tank 4.8 gal (US)

Hydraulic System

Auxiliary Circuit - Primary - Flow 17 gpm
Auxiliary Circuit - Primary - Pressure 3553 psi
Auxiliary Circuit - Secondary - Flow 7 gpm
Auxiliary Circuit - Secondary - Pressure 3553 psi
Digging Force - Bucket 6385 lbf
Digging Force - Stick - Long 3327 lbf
Digging Force - Stick - Standard 3732 lbf
Note * Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Operating Pressure - Equipment 3553 psi
Operating Pressure - Swing 2553 psi
Operating Pressure - Travel 3553 psi
Pump Flow at 2,400 rpm 26 gpm
Type Load Sensing Hydraulics with Variable Displacement Piston Pump

Swing System

Boom Swing - Left 75 °
Boom Swing - Right 50 °
Machine Swing Speed 9 r/min

Blade

Height 13.8 in
Width 61 in

Certification - Cab and Canopy

Roll Over Protective Structure (ROPS) ISO 12117-2:2008
Tip Over Protective Structure (TOPS) ISO 12117:1997
Top Guard ISO 10262:1998 (Level I)

Dimensions - Standard Stick

Boom Height - Shipping Position 63 in
Boom In Reach 68.9 in
Boom Swing - Left 25.2 in
Boom Swing - Right 34.3 in
Dig Depth 104.3 in
Maximum Blade Depth 21.1 in
Maximum Blade Height 15.2 in
Maximum Dig Height 177.6 in
Maximum Dump Clearance 124.8 in
Maximum Reach 196.1 in
Maximum Reach - Ground Level 190.2 in
Minimum Ground Clearance Below Undercarriage 12.2 in
Note *Overall Shipping Length depends on blade position during shipment.
O/A Shipping Height 97.6 in
O/A Undercarriage Length 81.5 in
Overall Shipping Length* 177.6 in
Stick Length 49.6 in
Swing Bearing - Height 22.4 in
Tail Swing with Extra Counterweight 35 in
Tail Swing without Counterweight 30.5 in
Track Belt/Shoe Width 11.8 in
Vertical Wall 71.7 in

Dimensions - Long Stick

Boom Height - Shipping Position 75.6 in
Boom In Reach 74.2 in
Boom Swing - Left 25.2 in
Boom Swing - Right 34.3 in
Dig Depth 116.1 in
Maximum Blade Depth 21.1 in
Maximum Blade Height 15.2 in
Maximum Dig Height 183.1 in
Maximum Dump Clearance 130.3 in
Maximum Reach 206.3 in
Maximum Reach - Ground Level 201.2 in
Minimum Ground Clearance Below Undercarriage 12.2 in
Note *Overall Shipping Length depends on blade position during shipment.
O/A Shipping Height 97.6 in
O/A Undercarriage Length 81.5 in
Overall Shipping Length* 179.5 in
Stick Length 61.4 in
Swing Bearing - Height 22.4 in
Tail Swing - with Extra Counterweight 35 in
Tail Swing without Counterweight 30.5 in
Track Belt/Shoe Width 11.8 in
Track Width 61 in
Vertical Wall 81.5 in

Air Conditioning System

Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf (Europe) (Global Warming Potential = 1430). See label or instruction manual for gas refrigerant identification. The system contains 0.75 kg (1.65 lb), 0.90 kg (1.98 lb) or 1.0 kg (2.20 lb) of refrigerant which has a CO2 equivalent of 1.430 metric tonnes (1.576 tons) for R134a and 0.001 tonnes (0.001 tons) for R1234yf (Europe).

Sound

Average Exterior Sound Pressure (ISO 6395:2008) 94 dB(A)
Note European Union Directive “2000/14/EC”
Operator Sound Pressure (ISO 6396:2008) 78 dB(A)

Sustainability

Recyclability 95%

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