Caterpillar 303.5 CR Mini Excavator Specs

Category: Mini Excavators ➔
Manufacturer: Caterpillar ➔
Model: 303.5 CR ➔

The Caterpillar 303.5 CR is a compact mini excavator designed for digging, trenching, grading, and utility work in confined job sites. It features a reduced tail swing design for improved maneuverability in tight spaces and is commonly used in landscaping, construction, and municipal applications. The 303.5 CR is part of Caterpillar's small excavator lineup and is typically equipped with a diesel engine, hydraulic auxiliary circuits, and a comfortable operator station. Its size and transportability make it suitable for projects requiring efficient earthmoving performance with limited site access.

General Specifications

Caterpillar 303.5 CR Mini Excavator General Specifications specifications
Digging Depth	9.70 ft (2.96 m) - Starting 2025
Digging Reach	17.70 ft (5.39 m) - Starting 2025
Engine	23.60 hp (17.60 kw) - Starting 2025
Operating Weight	9,239.00 lbs (4,190.75 kg) - Starting 2025

Air Conditioning System

Caterpillar 303.5 CR Mini Excavator Air Conditioning System specifications
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 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). - Starting 2026

Blade

Caterpillar 303.5 CR Mini Excavator Blade specifications
Height	13.80 in (35.05 cm) - Starting 2026
Width	70.10 in (178.05 cm) - Starting 2026

Certification - Cab And Canopy

Caterpillar 303.5 CR Mini Excavator Certification - Cab And Canopy specifications
Roll Over Protective Structure (ROPS)	ISO 12117-2:2008 - Starting 2026
Tip Over Protective Structure (TOPS)	ISO 12117:1997 - Starting 2026
Top Guard	ISO 10262:1998 (Level I) - Starting 2026

Dimensions - Long Stick

Caterpillar 303.5 CR Mini Excavator Dimensions - Long Stick specifications
Boom Height - Shipping Position	68.90 in (175.01 cm) - Starting 2026
Boom In Reach	73.20 in (185.93 cm) - Starting 2026
Boom Swing - Left	640.00 mm (25.20 in) - Starting 2026
Boom Swing - Right	34.3 degrees - Starting 2026
Dig Depth	122.40 in (310.90 cm) - Starting 2026
Maximum Blade Depth	21.10 in (53.59 cm) - Starting 2026
Maximum Blade Height	15.20 in (38.61 cm) - Starting 2026
Maximum Dig Height	197.60 in (501.90 cm) - Starting 2026
Maximum Dump Clearance	141.70 in (359.92 cm) - Starting 2026
Maximum Reach	216.90 in (550.93 cm) - Starting 2026
Maximum Reach - Ground Level	211.80 in (537.97 cm) - Starting 2026
Minimum Ground Clearance Below Undercarriage	12.20 in (30.99 cm) - Starting 2026
O/A Shipping Height	97.60 in (247.90 cm) - Starting 2026
O/A Undercarriage Length	87.40 in (222.00 cm) - Starting 2026
Overall Shipping Length*	190.90 in (484.89 cm) - Starting 2026
Stick Length	61.40 in (155.96 cm) - Starting 2026
Swing Bearing - Height	22.20 in (56.39 cm) - Starting 2026
Tail Swing - with Extra Counterweight	39.60 in (100.58 cm) - Starting 2026
Tail Swing without Counterweight	35.00 in (88.90 cm) - Starting 2026
Track Belt/Shoe Width	11.80 in (29.97 cm) - Starting 2026
Track Width	70.10 in (178.05 cm) - Starting 2026
Vertical Wall	94.10 in (239.01 cm) - Starting 2026

Dimensions - Standard Stick

Caterpillar 303.5 CR Mini Excavator Dimensions - Standard Stick specifications
Boom Height - Shipping Position	59.80 in (151.89 cm) - Starting 2026
Boom In Reach	69.30 in (176.02 cm) - Starting 2026
Boom Swing - Left	25.2 degrees - Starting 2026
Boom Swing - Right	34.3 degrees - Starting 2026
Dig Depth	110.60 in (280.92 cm) - Starting 2026
Maximum Blade Depth	21.10 in (53.59 cm) - Starting 2026
Maximum Blade Height	15.20 in (38.61 cm) - Starting 2026
Maximum Dig Height	193.70 in (492.00 cm) - Starting 2026
Maximum Dump Clearance	137.40 in (349.00 cm) - Starting 2026
Maximum Reach	207.50 in (527.05 cm) - Starting 2026
Maximum Reach - Ground Level	202.00 in (513.08 cm) - Starting 2026
Minimum Ground Clearance Below Undercarriage	12.20 in (30.99 cm) - Starting 2026
O/A Shipping Height	97.60 in (247.90 cm) - Starting 2026
O/A Undercarriage Length	87.40 in (222.00 cm) - Starting 2026
Overall Shipping Length*	189.00 in (480.06 cm) - Starting 2026
Stick Length	49.60 in (125.98 cm) - Starting 2026
Swing Bearing - Height	22.20 in (56.39 cm) - Starting 2026
Tail Swing with Extra Counterweight	39.60 in (100.58 cm) - Starting 2026
Tail Swing without Counterweight	35.00 in (88.90 cm) - Starting 2026
Track Belt/Shoe Width	11.80 in (29.97 cm) - Starting 2026
Track Width	70.10 in (178.05 cm) - Starting 2026
Vertical Wall	88.60 in (225.04 cm) - Starting 2026

Engine

Caterpillar 303.5 CR Mini Excavator Engine specifications
Bore	3.30 in (8.38 cm) - Starting 2026
Displacement	104.00 cu in (1,704.26 cu cm) - Starting 2026
Emissions	Meets U.S. EPA Tier 4 Final and EU Stage V emission standards. - Starting 2026
Engine Model	C1.7 - Starting 2026
Net Power	23.60 hp (17.60 kw) - Starting 2026
Net Power - ISO 9249	24.70 hp (18.42 kw) - Starting 2026
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) - Starting 2026
Stroke	3.90 in (9.91 cm) - Starting 2026

Hydraulic System

Caterpillar 303.5 CR Mini Excavator Hydraulic System specifications
Auxiliary Circuit - Primary - Flow	18.00 gpm (68.13 lpm) - Starting 2026
Auxiliary Circuit - Primary - Pressure	3553 psi - Starting 2026
Auxiliary Circuit - Secondary - Flow	7.00 gpm (26.50 lpm) - Starting 2026
Auxiliary Circuit - Secondary - Pressure	3553 psi - Starting 2026
Digging Force - Bucket	7,419.00 lbs ft (10,058.68 nm) - Starting 2026
Digging Force - Stick - Long	3,799.00 lbs ft (5,150.68 nm) - Starting 2026
Digging Force - Stick - Standard	4,249.00 lbs ft (5,760.79 nm) - Starting 2026
Operating Pressure - Equipment	3553 psi - Starting 2026
Operating Pressure - Swing	2625 psi - Starting 2026
Operating Pressure - Travel	3553 psi - Starting 2026
Pump Flow at 2,400 rpm	26.00 gpm (98.41 lpm) - Starting 2026
Type	Load Sensing Hydraulics with Variable Displacement Piston Pump - Starting 2026

Service Refill Capacities

Caterpillar 303.5 CR Mini Excavator Service Refill Capacities specifications
Cooling System	1.80 gal (6.81 l) - Starting 2026
Engine Oil	1.60 gal (6.06 l) - Starting 2026
Fuel Tank	11.90 gal (45.04 l) - Starting 2026
Hydraulic System	11.90 gal (45.04 l) - Starting 2026
Hydraulic Tank	5.30 gal (20.06 l) - Starting 2026

Sound

Caterpillar 303.5 CR Mini Excavator Sound specifications
Average Exterior Sound Pressure (ISO 6395:2008)	94 dB(A) - Starting 2026
Operator Sound Pressure (ISO 6396:2008)	78 dB(A) - Starting 2026

Sustainability

Caterpillar 303.5 CR Mini Excavator Sustainability specifications
Recyclability	95% - Starting 2026

Swing System

Caterpillar 303.5 CR Mini Excavator Swing System specifications
Boom Swing - Left	75 degrees - Starting 2026
Boom Swing - Right	50 degrees - Starting 2026
Machine Swing Speed	9 r/min - Starting 2026

Travel System

Caterpillar 303.5 CR Mini Excavator Travel System specifications
Gradeability - Maximum	30 degrees - Starting 2026
Ground Pressure - Maximum Weight	5.2 psi - Starting 2026
Ground Pressure - Minimum Weight	4.3 psi - Starting 2026
Maximum Traction Force - High Speed	3,799.00 lbs ft (5,150.68 nm) - Starting 2026
Maximum Traction Force - Low Speed	6,969.00 lbs ft (9,448.57 nm) - Starting 2026
Travel Speed - High	2.80 mph (4.51 kph) - Starting 2026
Travel Speed - Low	1.60 mph (2.57 kph) - Starting 2026

Weight Increase From Minimum Configuration

Caterpillar 303.5 CR Mini Excavator Weight Increase From Minimum Configuration specifications
Angle Blade	353.00 lbs (160.12 kg) - Starting 2026
Cab	309.00 lbs (140.16 kg) - Starting 2026
Counterweight	221.00 lbs (100.24 kg) - Starting 2026
Extra Counterweight	551.00 lbs (249.93 kg) - Starting 2026
Long Stick	44.00 lbs (19.96 kg) - Starting 2026
Steel Tracks	287.00 lbs (130.18 kg) - Starting 2026

Weights

Caterpillar 303.5 CR Mini Excavator Weights specifications
EU: CE Plate Weight with Cab***	8,004.00 lbs (3,630.56 kg) - Starting 2026
EU: CE Plate Weight with Canopy***	7,784.00 lbs (3,530.77 kg) - Starting 2026
Maximum Operating Weight with Cab**	9,239.00 lbs (4,190.75 kg) - Starting 2026
Maximum Operating Weight with Canopy**	8,930.00 lbs (4,050.58 kg) - Starting 2026
Minimum Operating Weight with Cab*	7,982.00 lbs (3,620.58 kg) - Starting 2026
Minimum Operating Weight with Canopy*	7,673.00 lbs (3,480.42 kg) - Starting 2026
Operating Weight	9,239.00 lbs (4,190.75 kg) - Starting 2026