303.5 CR Mini Hydraulic Excavator

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.

Key Features

More Comfort. More Performance. More Versatility.

Upgraded Performance

25% higher transient speeds result in 35% more productivity*

* Up to 25% and 35%, are against the previous model and based upon application, conditions and temperatures.

Cat® Exclusive Features

Stick steer joystick travel, cruise control, Sealed and pressurized cab with AC, Tilt-cab service access

Low Owning and Operating Costs

Easy service and repair access and extended service intervals and VisionLink™ Telematics

Media Gallery

Specifications

Net Power	23.6 hp
Engine Model	C1.7
Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269	23.6 hp
Net Power - ISO 9249	24.7 hp
Bore	3.3 in
Stroke	3.9 in
Displacement	104 in³
Emissions	Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.
Note	Advertised power is tested per the specified standard in effect at the time of manufacture.
Note (1)	Net power advertised is the power available at the flywheel when the engine is at the rated speed of 2,200 rpm and the engine is installed with the factory configured fan, air intake system, exhaust system and alternator with a minimum alternator load.

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

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

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

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

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

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

Width	70.1 in
Height	13.8 in

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

Dig Depth	110.6 in
Vertical Wall	88.6 in
Maximum Reach - Ground Level	202 in
Maximum Reach	207.5 in
Maximum Dig Height	193.7 in
Maximum Dump Clearance	137.4 in
Boom In Reach	69.3 in
Tail Swing without Counterweight	35 in
Tail Swing with Extra Counterweight	39.6 in
Maximum Blade Depth	21.1 in
Maximum Blade Height	15.2 in
Boom Height - Shipping Position	59.8 in
O/A Shipping Height	97.6 in
Swing Bearing - Height	22.2 in
O/A Undercarriage Length	87.4 in
Overall Shipping Length*	189 in
Boom Swing - Right	34.3 °
Boom Swing - Left	25.2 °
Track Belt/Shoe Width	11.8 in
Track Width	70.1 in
Minimum Ground Clearance Below Undercarriage	12.2 in
Stick Length	49.6 in
Note	*Overall Shipping Length depends on blade position during shipment.

Dig Depth	122.4 in
Vertical Wall	94.1 in
Maximum Reach - Ground Level	211.8 in
Maximum Reach	216.9 in
Maximum Dig Height	197.6 in
Maximum Dump Clearance	141.7 in
Boom In Reach	73.2 in
Tail Swing without Counterweight	35 in
Tail Swing - with Extra Counterweight	39.6 in
Maximum Blade Depth	21.1 in
Maximum Blade Height	15.2 in
Boom Height - Shipping Position	68.9 in
O/A Shipping Height	97.6 in
Swing Bearing - Height	22.2 in
O/A Undercarriage Length	87.4 in
Overall Shipping Length*	190.9 in
Boom Swing - Right	34.3 °
Boom Swing - Left	640 mm
Track Belt/Shoe Width	11.8 in
Track Width	70.1 in
Minimum Ground Clearance Below Undercarriage	12.2 in
Stick Length	61.4 in
Note	*Overall Shipping Length depends on blade position during shipment.

Air Conditioning	The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf (Europe) (Global Warming Potential = 1430). See label or instruction manual for gas refrigerant identification. The system contains 0.75 kg (1.65 lb), 0.90 kg (1.98 lb) or 1.0 kg (2.20 lb) of refrigerant which has a CO2 equivalent of 1.430 metric tonnes (1.576 tons) for R134a and 0.001 tonnes (0.001 tons) for R1234yf (Europe).

Air Conditioning

The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf (Europe) (Global Warming Potential = 1430). See label or instruction manual for gas refrigerant identification. The system contains 0.75 kg (1.65 lb), 0.90 kg (1.98 lb) or 1.0 kg (2.20 lb) of refrigerant which has a CO2 equivalent of 1.430 metric tonnes (1.576 tons) for R134a and 0.001 tonnes (0.001 tons) for R1234yf (Europe).