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303.5 CR Mini Hydraulic Excavator

303.5 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 3.3 in
Displacement 104 in³
Emissions Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
Engine Model C1.7
Gross Power - 2,400 rpm - SAE J1995 24.7 hp
Net Power 23.6 hp
Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269 23.6 hp
Note Net power is tested per ISO 9249 and 80/1269/EEC.
Note (2) Net power advertised is the power available at the flywheel when the engine is at rated speed and rated power when the engine is installed with the factory configured fan, air intake system, exhaust system, and alternator with a minimum alternator load.
Stroke 3.9 in

Weights

EU: CE Plate Weight with Cab*** 8004 lb
EU: CE Plate Weight with Canopy*** 7784 lb
Maximum Operating Weight with Cab** 9239 lb
Maximum Operating Weight with Canopy** 8930 lb
Minimum Operating Weight with Cab* 7982 lb
Minimum Operating Weight with Canopy* 7673 lb
Note (1) * Minimum Weight is based on fixed rubber tracks, operator, full fuel tank, standard stick, blade, bucket and no extra counterweight.
Note (2) **Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, blade, 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 9239 lb

Dimensions - Long Stick

Boom Height - Shipping Position 68.9 in
Boom In Reach 73.2 in
Boom Swing - Left 640 mm
Boom Swing - Right 34.3 °
Dig Depth 122.4 in
Ground Clearance 12.2 in
Maximum Blade Depth 21.1 in
Maximum Blade Height 15.2 in
Maximum Dig Height 197.6 in
Maximum Dump Clearance 141.7 in
Maximum Reach 216.9 in
Maximum Reach - Ground Level 211.8 in
Note *Overall Shipping Length depends on blade position during shipment.
O/A Shipping Height 97.6 in
O/A Track Width 70.1 in
O/A Undercarriage Length 87.4 in
Overall Shipping Length* 190.9 in
Stick Length 61.4 in
Swing Bearing - Height 22.2 in
Tail Swing with Counterweight 37.8 in
Tail Swing without Counterweight 35 in
Track Belt/Shoe Width 11.8 in
Vertical Wall 94.1 in

Blade

Height 13.8 in
Width 70.1 in

Dimensions - Standard Stick

Boom Height - Shipping Position 59.8 in
Boom In Reach 69.3 in
Boom Swing - Left 25.2 °
Boom Swing - Right 34.3 °
Dig Depth 110.6 in
Ground Clearance 12.2 in
Maximum Blade Depth 21.1 in
Maximum Blade Height 15.2 in
Maximum Dig Height 193.7 in
Maximum Dump Clearance 137.4 in
Maximum Reach 207.5 in
Maximum Reach - Ground Level 202 in
Note *Overall Shipping Length depends on blade position during shipment.
O/A Shipping Height 97.6 in
O/A Undercarriage Length 87.4 in
Overall Shipping Length* 189 in
Stick Length 49.6 in
Swing Bearing - Height 22.2 in
Tail Swing with Counterweight 37.8 in
Tail Swing with Extra Counterweight 39.6 in
Tail Swing without Counterweight 35 in
Track Belt/Shoe Width 11.8 in
Vertical Wall 88.6 in

Weight Increase from Minimum Configuration

Angle Blade 353 lb
Cab 309 lb
Counterweight 221 lb
Extra Counterweight 551 lb
Long Stick 44 lb
Steel Tracks 287 lb

Service Refill Capacities

Cooling System 1.8 gal (US)
Engine Oil 1.6 gal (US)
Fuel Tank 11.9 gal (US)
Hydraulic System 11.9 gal (US)
Hydraulic Tank 5.3 gal (US)

Travel System

Gradeability - Maximum 30 degrees
Ground Pressure - Maximum Weight 5.2 psi
Ground Pressure - Minimum Weight 4.3 psi
Maximum Traction Force - High Speed 3799 lbf
Maximum Traction Force - Low Speed 6969 lbf
Travel Speed - High 2.8 mile/h
Travel Speed - Low 1.6 mile/h

Hydraulic System

Auxiliary Circuit - Primary - Flow 18 gal/min
Auxiliary Circuit - Primary - Pressure 3553 psi
Auxiliary Circuit - Secondary - Flow 7 gal/min
Auxiliary Circuit - Secondary - Pressure 3553 psi
Digging Force - Bucket 7419 lbf
Digging Force - Stick - Long 3799 lbf
Digging Force - Stick - Standard 4249 lbf
Note *Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Operating Pressure - Equipment 3553 psi
Operating Pressure - Swing 2625 psi
Operating Pressure - Travel 3553 psi
Pump Flow at 2,400 rpm 26 gal/min
Type Load Sensing Hydraulics with Variable Displacement Piston Pump

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)

Swing System

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

Dimensions (Approximate) - Standard Stick

Tail Swing with Extra Counterweight 39.6 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 (Approximate) - Long Stick

Tail Swing with Extra Counterweight 39.6 in

Sustainability

Recyclability 95%

Download resources

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

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