Mini Excavators

303.5 CR Mini Hydraulic Excavator

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303.5 CR Mini Hydraulic Excavator
303.5 CR Mini Hydraulic Excavator
303.5 CR Mini Hydraulic Excavator
303.5 CR Mini Hydraulic Excavator
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Top View
Left View
Rear View
Right View
303.5 CR Mini Hydraulic Excavator
US
Metric

Overview

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.

Engine

Net Power
23.60 HP
17.60 kW

Weights

Operating Weight
9239.00 lb
4190.00 kg

Dimensions - Long Stick

Dig Depth
122.40 in
3110.00 mm

Engine

Engine Model
C1.7

Blade

Height
13.80 in
350.00 mm

Dimensions - Long Stick

Track Belt/Shoe Width
11.80 in
300.00 mm

Dimensions - Standard Stick

Boom Swing - Right
34.30 °
870.00 mm

Engine

Bore
3.30 in
84.00 mm

Dimensions - Standard Stick

Tail Swing with Counterweight
37.80 in
960.00 mm

Dimensions - Long Stick

Maximum Reach
216.90 in
5510.00 mm

Weights

Minimum Operating Weight with Canopy*
7673.00 lb
3480.00 kg

Weight Increase from Minimum Configuration

Cab
309.00 lb
140.00 kg

Service Refill Capacities

Fuel Tank
11.90 gal (US)
45.00 l

Dimensions - Long Stick

O/A Track Width
70.10 in
1780.00 mm

Travel System

Ground Pressure - Minimum Weight
4.30 psi
29.60 kPa
Maximum Traction Force - High Speed
3799.00 lbf
16.90 kN

Dimensions - Standard Stick

Stick Length
49.60 in
1260.00 mm

Hydraulic System

Pump Flow at 2,400 rpm
26.00 gal/min
100.00 l/min

Engine

Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269
23.60 HP
17.60 kW

Dimensions - Long Stick

Maximum Blade Depth
21.10 in
535.00 mm

Service Refill Capacities

Hydraulic Tank
5.30 gal (US)
20.00 l

Travel System

Maximum Traction Force - Low Speed
6969.00 lbf
31.00 kN

Dimensions - Long Stick

Tail Swing without Counterweight
35.00 in
890.00 mm

Dimensions - Standard Stick

Maximum Reach - Ground Level
202.00 in
5130.00 mm

Hydraulic System

Auxiliary Circuit - Primary - Flow
18.00 gal/min
70.00 l/min

Dimensions - Standard Stick

Boom Swing - Left
25.20 °
640.00 mm
Maximum Reach
207.50 in
5270.00 mm
Track Belt/Shoe Width
11.80 in
300.00 mm

Weight Increase from Minimum Configuration

Counterweight
221.00 lb
100.00 kg

Dimensions - Standard Stick

Maximum Dump Clearance
137.40 in
3490.00 mm
Swing Bearing - Height
22.20 in
565.00 mm

Sound

Note
European Union Directive ‚ "2000/14/EC"

Dimensions - Long Stick

Stick Length
61.40 in
1560.00 mm

Travel System

Travel Speed - High
2.80 mile/h
4.50 km/h

Dimensions - Standard Stick

Boom Height - Shipping Position
59.80 in
1520.00 mm

Dimensions - Long Stick

Swing Bearing - Height
22.20 in
565.00 mm

Weights

EU: CE Plate Weight with Cab***
8004.00 lb
3630.00 kg

Hydraulic System

Operating Pressure - Swing
2625.00 psi
181.00 bar

Weights

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.

Weight Increase from Minimum Configuration

Steel Tracks
287.00 lb
130.00 kg

Weights

Maximum Operating Weight with Cab**
9239.00 lb
4190.00 kg

Engine

Displacement
104.00 in³
1.70 l

Sound

Operator Sound Pressure (ISO 6396:2008)
78.00 dB(A)
78.00 dB(A)

Dimensions - Long Stick

Boom Swing - Left
640.00 mm
25.20 °
Overall Shipping Length*
190.90 in
4850.00 mm

Hydraulic System

Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Auxiliary Circuit - Secondary - Pressure
3553.00 psi
245.00 bar

Swing System

Machine Swing Speed
9.00 r/min
9.00 r/min

Weights

Maximum Operating Weight with Canopy**
8930.00 lb
4050.00 kg

Dimensions - Long Stick

Maximum Reach - Ground Level
211.80 in
5380.00 mm
Maximum Dump Clearance
141.70 in
3600.00 mm
Tail Swing with Counterweight
37.80 in
960.00 mm

Hydraulic System

Digging Force - Stick - Long
3799.00 lbf
16.90 kN

Dimensions - Standard Stick

O/A Shipping Height
97.60 in
2480.00 mm
Overall Shipping Length*
189.00 in
4800.00 mm

Travel System

Gradeability - Maximum
30 degrees

Dimensions - Standard Stick

Boom In Reach
69.30 in
1760.00 mm

Engine

Note
Net power is tested per ISO 9249 and 80/1269/EEC.

Dimensions - Long Stick

O/A Shipping Height
97.60 in
2480.00 mm

Hydraulic System

Auxiliary Circuit - Secondary - Flow
7.00 gal/min
25.00 l/min

Dimensions - Standard Stick

Note
*Overall Shipping Length depends on blade position during shipment.
Tail Swing with Extra Counterweight
39.60 in
1005.00 mm

Engine

Gross Power - 2,400 rpm - SAE J1995
24.70 HP
18.40 kW

Weights

EU: CE Plate Weight with Canopy***
7784.00 lb
3530.00 kg

Dimensions - Standard Stick

Maximum Dig Height
193.70 in
4920.00 mm

Travel System

Travel Speed - Low
1.60 mile/h
2.60 km/h

Hydraulic System

Digging Force - Bucket
7419.00 lbf
33.00 kN

Dimensions - Long Stick

Note
*Overall Shipping Length depends on blade position during shipment.

Hydraulic System

Operating Pressure - Travel
3553.00 psi
245.00 bar

Dimensions - Standard Stick

Vertical Wall
88.60 in
2250.00 mm

Weights

Minimum Operating Weight with Cab*
7982.00 lb
3620.00 kg

Hydraulic System

Operating Pressure - Equipment
3553.00 psi
245.00 bar

Dimensions - Long Stick

Boom In Reach
73.20 in
1860.00 mm
Maximum Dig Height
197.60 in
5020.00 mm

Weight Increase from Minimum Configuration

Long Stick
44.00 lb
20.00 kg

Weights

Note (1)
* Minimum Weight is based on fixed rubber tracks, operator, full fuel tank, standard stick, blade, bucket and no extra counterweight.

Dimensions - Standard Stick

Dig Depth
110.60 in
2810.00 mm

Dimensions (Approximate) - Standard Stick

Tail Swing with Extra Counterweight
39.60 in
1005.00 mm

Certification - Cab and Canopy

Roll Over Protective Structure (ROPS)
ISO 12117-2:2008

Service Refill Capacities

Cooling System
1.80 gal (US)
7.00 l

Dimensions - Long Stick

Vertical Wall
94.10 in
2390.00 mm

Service Refill Capacities

Engine Oil
1.60 gal (US)
6.00 l

Dimensions - Standard Stick

O/A Undercarriage Length
87.40 in
2220.00 mm

Sound

Average Exterior Sound Pressure (ISO 6395:2008)
94.00 dB(A)
94.00 dB(A)

Weights

Note (2)
**Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, blade, bucket and extra counterweight.

Service Refill Capacities

Hydraulic System
11.90 gal (US)
45.00 l

Hydraulic System

Auxiliary Circuit - Primary - Pressure
3553.00 psi
245.00 bar

Engine

Emissions
Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.

Dimensions - Long Stick

Boom Height - Shipping Position
68.90 in
1750.00 mm

Dimensions - Standard Stick

Tail Swing without Counterweight
35.00 in
890.00 mm
Maximum Blade Depth
21.10 in
535.00 mm

Hydraulic System

Digging Force - Stick - Standard
4249.00 lbf
18.90 kN

Dimensions - Long Stick

Maximum Blade Height
15.20 in
385.00 mm

Certification - Cab and Canopy

Tip Over Protective Structure (TOPS)
ISO 12117:1997

Dimensions - Standard Stick

Maximum Blade Height
15.20 in
385.00 mm

Travel System

Ground Pressure - Maximum Weight
5.20 psi
35.70 kPa

Dimensions - Long Stick

O/A Undercarriage Length
87.40 in
2220.00 mm
Boom Swing - Right
34.30 °
870.00 mm

Dimensions (Approximate) - Long Stick

Tail Swing with Extra Counterweight
39.60 in
1005.00 mm

Engine

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.

Certification - Cab and Canopy

Top Guard
ISO 10262:1998 (Level I)

Engine

Stroke
3.90 in
100.00 mm

Weight Increase from Minimum Configuration

Angle Blade
353.00 lb
160.00 kg

Dimensions - Long Stick

Ground Clearance
12.20 in
310.00 mm

Blade

Width
70.10 in
1780.00 mm

Hydraulic System

Note
*Flow and pressure are not combinable. Under load, as flow rises pressure goes down.

Dimensions - Standard Stick

Ground Clearance
12.20 in
310.00 mm

Weight Increase from Minimum Configuration

Extra Counterweight
551.00 lb
250.00 kg

Swing System

Boom Swing - Right
50.00 °
50.00 °
Boom Swing - Left
75.00 °
75.00 °

Sustainability

Recyclability
95%
Features

ALL DAY COMFORT

  • Choose either a canopy or a sealed and pressurized cab which can be equipped with air conditioning, adjustable wrist rests, and a suspension seat option to help keep you working comfortably all day long.

EASY TO OPERATE

  • Controls are easy to use and the intuitive Next Generation LCD monitor provides easy to read machine information. An advanced touchscreen monitor can also be equipped.

STICK STEER TRAVEL MODE

  • Moving around the job site is even easier with the Cat Stick Steer option. Easily switch from traditional travel controls with levers and pedals to joystick controls to move the machine and to operate the blade. The benefit of less effort and improved control is in your hands!

BIG PERFORMANCE IN A COMPACT DESIGN

  • Strong lift and dig performance helps you get the job done faster. The compact radius design lets you access and work in the tightest areas. Dozer float allows for easy clean up.

SAFETY ON THE JOB SITE

  • Your safety is our top priority. The Cat mini excavator is designed to help keep you safe on the job. Courtesy work lights and a fluorescent retractable seat belt are just a couple of the safety features we’ve built into the machine.

SIMPLE SERVICE FOR LESS DOWNTIME

  • Maintenance is quick and easy on the Cat mini excavator. Routine check points are easy to access at ground level through the side doors. The unique tilt up cab or canopy lets you reach additional service areas when needed.

LOWER OPERATING COSTS

  • Equipped with features such as auto idle, auto engine shutdown, and efficient hydraulics with a variable displacement pump, the Cat mini excavator was designed with reducing your operating costs in mind.

SUSTAINABILITY

  • The Cat® C1.7 engine meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards.
  • Cat 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 (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details.
  • Auto Idle helps reduce unnecessary fuel burn and greenhouse gas emissions by allowing the engine to automatically go into idle mode when the machine is not working.
  • Engine Idle Shutdown Timer reduces fuel burn, greenhouse gas emissions and unnecessary idle time by shutting down the machine after a pre-set idling period.
  • Cruise control helps you maintain a constant speed as you travel across your jobsite saving fuel and reducing greenhouse gas emissions.
  • The Cat® Seat Belt Reminder provides audible and visual warnings to remind operators to buckle up during machine operation. The easy-to-install system is compatible with all equipment brands to help ensure operator safety.
  • Extended maintenance intervals not only reduce downtime but decrease the amount of fluid and filters that are replaced over the life of the machine.
  • Remote Flash minimizes downtime and maintenance time while keeping your asset running with maximum efficiency. Alerts for machine updates are sent virtually from your Cat dealer and updates can be deployed without a dealer technician needing to be onsite.(if equipped)
  • Remote Troubleshoot decreases maintenance time and keeps your machine running with maximum efficiency by allowing your Cat dealer to virtually test the machine while working. Once a problem is identified, a technician can fix it the first time, saving time and money.(if equipped)
  • Cat Grade with advanced 2D and 3D technologies combine advanced guidance with optional automated machine control helping you reach grading targets while reducing fuel burn and greenhouse gas emissions by improving efficiency, job site productivity, and accuracy. (if equipped).
*Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel. (for use of blends higher than 20% biodiesel, consult your Cat dealer)
Standard Equipment
  • 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
Optional Equipment
  • 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