Caterpillar

303.5 CR Mini Hydraulic Excavator

Name: 303.5 CR Mini Hydraulic Excavator
Brand: Caterpillar

Net Power

23.6 hp

17.6 kW

Operating Weight

9239 lb

4190 kg

Dig Depth

122.4 in

3110 mm

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.

Media

See the new Cat 302.7 CR, 303 CR and 303.5 CR Mini Excavators in action.

Learn about the features and benefits of the new Cat 302.7 CR, 303 CR and 303.5 CR Mini Excavators.

Easy to read monitor lets you adjust machine settings to your operating preference.

Learn about the the differences between the Cat 302.7 CR, 303 CR and 303.5 CR Next Generation Mini Excavators so that you can select the correct model for your application needs.

Exterior

Model shown represents features on all Cat® Mini Excavators except where indicated.

Interior

Model shown represents features on all Cat® Mini Excavators except where indicated.

Documents

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Features

ALL DAY COMFORT

EASY TO OPERATE

STICK STEER TRAVEL MODE

BIG PERFORMANCE IN A COMPACT DESIGN

SAFETY ON THE JOB SITE

SIMPLE SERVICE FOR LESS DOWNTIME

LOWER OPERATING COSTS

SUSTAINABILITY

Specifications

US Metric

Engine

Spec	Value
Net Power	23.6 hp 17.6 kW
Engine Model	C1.7 C1.7
Bore	3.3 in 84 mm
Net Power @ 2,200 rpm – U.S. EPA Tier 4 Final/EU Stage V – ISO 9249/EEC 80/1269	23.6 hp 17.6 kW
Displacement	104 in³ 1.7 l
Note	Net power is tested per ISO 9249 and 80/1269/EEC. Net power is tested per ISO 9249 and 80/1269/EEC.
Gross Power – 2,400 rpm – SAE J1995	24.7 hp 18.4 kW
Emissions	Meets U.S. EPA Tier 4 Final and EU Stage V emission standards. Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
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. 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 100 mm

Weights

Spec	Value
Operating Weight	9239 lb 4190 kg
Minimum Operating Weight with Canopy*	7673 lb 3480 kg
EU: CE Plate Weight with Cab***	8004 lb 3630 kg
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. *CE Plate Weight is based on the most common EU configuration. Includes 75 kg (165 lb) operator and full fuel tank and excludes bucket.
Maximum Operating Weight with Cab**	9239 lb 4190 kg
Maximum Operating Weight with Canopy**	8930 lb 4050 kg
EU: CE Plate Weight with Canopy***	7784 lb 3530 kg
Minimum Operating Weight with Cab*	7982 lb 3620 kg
Note (1)	* Minimum Weight is based on fixed rubber tracks, operator, full fuel tank, standard stick, blade, bucket and no extra counterweight. * 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. Maximum Weight is based on steel tracks, operator, full fuel tank, long stick, blade, bucket and extra counterweight.

Dimensions - Long Stick

Spec	Value
Dig Depth	122.4 in 3110 mm
Track Belt/Shoe Width	11.8 in 300 mm
Maximum Reach	216.9 in 5510 mm
O/A Track Width	70.1 in 1780 mm
Maximum Blade Depth	21.1 in 535 mm
Tail Swing without Counterweight	35 in 890 mm
Stick Length	61.4 in 1560 mm
Swing Bearing – Height	22.2 in 565 mm
Boom Swing – Left	640 mm 25.2 °
Overall Shipping Length*	190.9 in 4850 mm
Maximum Reach – Ground Level	211.8 in 5380 mm
Maximum Dump Clearance	141.7 in 3600 mm
Tail Swing with Counterweight	37.8 in 960 mm
O/A Shipping Height	97.6 in 2480 mm
Note	Overall Shipping Length depends on blade position during shipment. Overall Shipping Length depends on blade position during shipment.
Boom In Reach	73.2 in 1860 mm
Maximum Dig Height	197.6 in 5020 mm
Vertical Wall	94.1 in 2390 mm
Boom Height – Shipping Position	68.9 in 1750 mm
Maximum Blade Height	15.2 in 385 mm
O/A Undercarriage Length	87.4 in 2220 mm
Boom Swing – Right	34.3 ° 870 mm
Ground Clearance	12.2 in 310 mm

Blade

Spec	Value
Height	13.8 in 350 mm
Width	70.1 in 1780 mm

Dimensions - Standard Stick

Spec	Value
Boom Swing – Right	34.3 ° 870 mm
Tail Swing with Counterweight	37.8 in 960 mm
Stick Length	49.6 in 1260 mm
Maximum Reach – Ground Level	202 in 5130 mm
Boom Swing – Left	25.2 ° 640 mm
Maximum Reach	207.5 in 5270 mm
Track Belt/Shoe Width	11.8 in 300 mm
Maximum Dump Clearance	137.4 in 3490 mm
Swing Bearing – Height	22.2 in 565 mm
Boom Height – Shipping Position	59.8 in 1520 mm
O/A Shipping Height	97.6 in 2480 mm
Overall Shipping Length*	189 in 4800 mm
Boom In Reach	69.3 in 1760 mm
Note	Overall Shipping Length depends on blade position during shipment. Overall Shipping Length depends on blade position during shipment.
Tail Swing with Extra Counterweight	39.6 in 1005 mm
Maximum Dig Height	193.7 in 4920 mm
Vertical Wall	88.6 in 2250 mm
Dig Depth	110.6 in 2810 mm
O/A Undercarriage Length	87.4 in 2220 mm
Tail Swing without Counterweight	35 in 890 mm
Maximum Blade Depth	21.1 in 535 mm
Maximum Blade Height	15.2 in 385 mm
Ground Clearance	12.2 in 310 mm

Weight Increase from Minimum Configuration

Spec	Value
Cab	309 lb 140 kg
Counterweight	221 lb 100 kg
Steel Tracks	287 lb 130 kg
Long Stick	44 lb 20 kg
Angle Blade	353 lb 160 kg
Extra Counterweight	551 lb 250 kg

Service Refill Capacities

Spec	Value
Fuel Tank	11.9 gal (US) 45 l
Hydraulic Tank	5.3 gal (US) 20 l
Cooling System	1.8 gal (US) 7 l
Engine Oil	1.6 gal (US) 6 l
Hydraulic System	11.9 gal (US) 45 l

Travel System

Spec	Value
Ground Pressure – Minimum Weight	4.3 psi 29.6 kPa
Maximum Traction Force – High Speed	3799 lbf 16.9 kN
Maximum Traction Force – Low Speed	6969 lbf 31 kN
Travel Speed – High	2.8 mile/h 4.5 km/h
Gradeability – Maximum	30 degrees 30 degrees
Travel Speed – Low	1.6 mile/h 2.6 km/h
Ground Pressure – Maximum Weight	5.2 psi 35.7 kPa

Hydraulic System

Spec	Value
Pump Flow at 2,400 rpm	26 gal/min 100 l/min
Auxiliary Circuit – Primary – Flow	18 gal/min 70 l/min
Operating Pressure – Swing	2625 psi 181 bar
Type	Load Sensing Hydraulics with Variable Displacement Piston Pump Load Sensing Hydraulics with Variable Displacement Piston Pump
Auxiliary Circuit – Secondary – Pressure	3553 psi 245 bar
Digging Force – Stick – Long	3799 lbf 16.9 kN
Auxiliary Circuit – Secondary – Flow	7 gal/min 25 l/min
Digging Force – Bucket	7419 lbf 33 kN
Operating Pressure – Travel	3553 psi 245 bar
Operating Pressure – Equipment	3553 psi 245 bar
Auxiliary Circuit – Primary – Pressure	3553 psi 245 bar
Digging Force – Stick – Standard	4249 lbf 18.9 kN
Note	Flow and pressure are not combinable. Under load, as flow rises pressure goes down. Flow and pressure are not combinable. Under load, as flow rises pressure goes down.

Sound

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

Swing System

Spec	Value
Machine Swing Speed	9 r/min 9 r/min
Boom Swing – Right	50 ° 50 °
Boom Swing – Left	75 ° 75 °

Dimensions (Approximate) - Standard Stick

Spec	Value
Tail Swing with Extra Counterweight	39.6 in 1005 mm

Certification - Cab and Canopy

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

Dimensions (Approximate) - Long Stick

Spec	Value
Tail Swing with Extra Counterweight	39.6 in 1005 mm

Sustainability

Spec	Value
Recyclability	95% 95%

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