303.5 CR

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An extensive line of Cat® mini hydraulic excavators offers the performance to dig in and be productive on every job.

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Specifications

Blade

Height

13.8 in 350 mm
Width

70.1 in 1780 mm

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 - Long Stick

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.
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

Dimensions - Standard Stick

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.
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

Dimensions (Approximate) - Long Stick

Tail Swing with Extra Counterweight

39.6 in 1005 mm

Dimensions (Approximate) - Standard Stick

Tail Swing with Extra Counterweight

39.6 in 1005 mm

Engine

Net Power

23.6 hp 17.6 kW
Engine Model

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.
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.
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 100 mm

Hydraulic System

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
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.

Service Refill Capacities

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

Sound

Note

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)

Sustainability

Recyclability

95%

Swing System

Machine Swing Speed

9 r/min 9 r/min
Boom Swing - Right

50 ° 50 °
Boom Swing - Left

75 ° 75 °

Travel System

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
Travel Speed - Low

1.6 mile/h 2.6 km/h
Ground Pressure - Maximum Weight

5.2 psi 35.7 kPa

Weight Increase from Minimum Configuration

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

Weights

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.
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.
Note (2)

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

Benefits

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)

Equipment Info