New CAT Equipment

303.5 CR Mini Hydraulic Excavator

Mini Excavators Inspired by Our Customers

The Cat® 303.5 CR Mini Excavator delivers power and performance in a compact size to help you work in a wide range of applications.

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Benefits

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

Learn more about the 303.5 CR Mini Hydraulic Excavator

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  • Blade
    Height
    13.8 in
    Width
    70.1 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
  • Dimensions (Approximate) - Standard Stick
    Tail Swing with Extra Counterweight
    39.6 in
  • 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
  • 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
  • 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
  • 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
  • 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)
  • 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%
  • Swing System
    Boom Swing - Left
    75 °
    Boom Swing - Right
    50 °
    Machine Swing Speed
    9 r/min
  • 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
  • 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
  • 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
ENGINE
  • Cat C1.7 NA Engine (U.S. EPA Tier 4 Final/EU Stage V)
  • Automatic Engine Idle
  • Automatic Engine Shutdown
  • Automatic Two Speed Travel
  • Fuel Water Separator
  • Power on Demand (not available in all regions)
  • Variable Displacement Piston Pump
  • Load Sensing/Flow Sharing Hydraulics
HYDRAULICS
  • Smart Tech Electronic Pump
  • Accumulator
  • Automatic Swing Brake
  • Auxiliary Hydraulic Lines
  • One and Two Way Auxiliary Flow
  • Continuous Auxiliary Flow
  • Auxiliary Line Quick Disconnects
OPERATOR ENVIRONMENT
  • Tilt-up Canopy or Tilt-Up Cab
  • Top Guard ISO 10262:1998 Level I
  • ROPS – ISO 12117-2:2008
  • TOPS – ISO 12117:1997
  • Stick Steer Mode
  • Travel Cruise Control
  • Control Pattern Changer (optional in some regions)
  • Adjustable Wrist Rests
  • Washable Floor Mat
  • Travel Pedals and Hand Levers
  • Machine Security
  • Machine Security – Standard Key with Pass Code
  • Fabric Suspension Seat (Cab only)
  • Vinyl Suspension Seat (Canopy only)
  • Hydraulic Lockout – All Controls
  • Retractable High Visibility Seat Belt (75 mm/3 in)
  • Coat Hook
  • Cup Holder
  • Storage Pocket
  • Skylight
  • Mounting Bosses for Front
  • Signaling/Warning Horn
  • Interior Light (Cab only)
  • Boom Light, Halogen
  • Utility Space for Mobile Phone
  • Next Generation Color LCD Monitor (IP66)
    – Fuel Level and Coolant Temperature Gauges
    – Maintenance and Machine Monitoring
    – Performance and Machine Adjustments
    – Numeric Security Code
    – Multiple Languages
    – Hour Meter with Wake Up Switch
    – Jog Dial (cab only)

    Next Generation Advanced Monitor (Optional)
    – Fuel Level and Coolant Temperature Gauges
    – Maintenance and Machine Monitoring
    – Performance and Machine Adjustments
    – Numeric Security Code
    – Multiple Languages
    – Hour Meter with Wake Up Switch
UNDERCARRIAGE
  • Rubber Belt (300 mm/11.8 in wide)
  • Dozer Blade
  • Dozer Blade Float
  • Angle Blade
  • Tie Downs on Track Frame
BOOM, STICK AND LINKAGES
  • One Piece Boom (2400 mm/94.5 in)
  • Standard Stick (1260 mm/49.6 in)
  • Front Shovel Capable – Pin-On
  • Thumb Ready (not available in all regions)
  • Certified Lifting Eye (optional in some regions)
ELECTRICAL
  • 12 Volt Battery
  • Software (machine and monitor)
  • Maintenance Free Battery
  • Signaling/Warning Horn
  • 12 Volt Power Socket
OPERATOR ENVIRONMENT
  • Cab with Air Conditioning
  • Cab with Heater
  • Control Pattern Changer (optional in some regions)
  • No Travel Pedals and Hand Levers
  • Machine Security – Push to Start with Key Fob/Pass Code
  • Vinyl Non-Suspension Seat (Canopy only)
  • LED Front Lights
  • LED Front and Rear Lights
  • LED Boom Light
  • Mirrors Left and Right
  • Radio – Bluetooth®, Auxiliary, Microphone, USB (charging only) (Cab only)
UNDERCARRIAGE
  • Steel Track (300 mm/11.8 in wide)
BOOM, STICK AND LINKAGES
  • Long Stick (1560 mm/61.4 in)
  • Front Shovel Capable – Dual Lock Manual Coupler
  • Attachments including Couplers, Thumbs, Buckets, Augers and Hammers
  • 2nd Auxiliary Hydraulic Lines
  • Boom Lowering Check Valve
  • Stick Lowering Check Valve
  • Hydraulic Quick Coupler Lines (not available in all regions)
  • Front Shovel Capable – Hydraulic Coupler
ELECTRICAL
  • Battery Disconnect
  • Product Link PL243 (regulations apply)
  • Product Link PLE643 (regulations apply)
  • Travel Alarm (standard in some regions)
GUARDING
  • Guard, Canopy
  • Guard, Mesh
OTHER
  • Bio Oil Capable
  • Eco Drain
  • Water Jacket Heater

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