Big EOFY Savings on Cat Compact machines until 30 June 2026. T&Cs apply. View Promotion

Big EOFY Savings on Cat Compact machines until 30 June 2026. T&Cs apply. View Promotion

303.5 CR Mini Hydraulic Excavator

303.5 CR

Mini Excavators
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.
Net Power
23.6 hp/17.6 kW
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/17.6 kW
Net Power - ISO 9249
24.7 hp/18.4 kW

Key Features

Specifications

Metric | Imperial
Engine Expand Collapse
Net Power
23.6 hp 17.6 kW
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 17.6 kW
Net Power - ISO 9249
24.7 hp 18.4 kW
Bore
3.3 in 84 mm
Stroke
3.9 in 100 mm
Displacement
104 in³ 1.7 l
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 4190 kg
Minimum Operating Weight with Canopy*
7673 lb 3480 kg
Maximum Operating Weight with Canopy**
8930 lb 4050 kg
Minimum Operating Weight with Cab*
7982 lb 3620 kg
Maximum Operating Weight with Cab**
9239 lb 4190 kg
EU: CE Plate Weight with Canopy***
7784 lb 3530 kg
EU: CE Plate Weight with Cab***
8004 lb 3630 kg
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.
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 140 kg
Counterweight
221 lb 100 kg
Extra Counterweight
551 lb 250 kg
Long Stick
44 lb 20 kg
Steel Tracks
287 lb 130 kg
Angle Blade
353 lb 160 kg
Travel Speed - High
2.8 mile/h 4.5 km/h
Travel Speed - Low
1.6 mile/h 2.6 km/h
Maximum Traction Force - High Speed
3799 lbf 16.9 kN
Maximum Traction Force - Low Speed
6969 lbf 31 kN
Ground Pressure - Minimum Weight
4.3 psi 29.6 kPa
Ground Pressure - Maximum Weight
5.2 psi 35.7 kPa
Gradeability - Maximum
30 degrees
Cooling System
1.8 gal (US) 7 l
Engine Oil
1.6 gal (US) 6 l
Fuel Tank
11.9 gal (US) 45 l
Hydraulic Tank
5.3 gal (US) 20 l
Hydraulic System
11.9 gal (US) 45 l
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Pump Flow at 2,400 rpm
26 gpm 100 L/min
Operating Pressure - Equipment
3553 psi 245 bar
Operating Pressure - Travel
3553 psi 245 bar
Operating Pressure - Swing
2625 psi 181 bar
Auxiliary Circuit - Primary - Flow
18 gpm 70 L/min
Auxiliary Circuit - Primary - Pressure
3553 psi 245 bar
Auxiliary Circuit - Secondary - Flow
7 gpm 25 L/min
Auxiliary Circuit - Secondary - Pressure
3553 psi 245 bar
Digging Force - Stick - Standard
4249 lbf 18.9 kN
Digging Force - Stick - Long
3799 lbf 16.9 kN
Digging Force - Bucket
7419 lbf 33 kN
Note
Advertised power is tested per the specified standard in effect at the time of manufacture.
Machine Swing Speed
9 r/min 9 r/min
Boom Swing - Left
75 ° 75 °
Boom Swing - Right
50 ° 50 °
Width
70.1 in 1780 mm
Height
13.8 in 350 mm
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 2810 mm
Vertical Wall
88.6 in 2250 mm
Maximum Reach - Ground Level
202 in 5130 mm
Maximum Reach
207.5 in 5270 mm
Maximum Dig Height
193.7 in 4920 mm
Maximum Dump Clearance
137.4 in 3490 mm
Boom In Reach
69.3 in 1760 mm
Tail Swing without Counterweight
35 in 890 mm
Tail Swing with Extra Counterweight
39.6 in 1005 mm
Maximum Blade Depth
21.1 in 535 mm
Maximum Blade Height
15.2 in 385 mm
Boom Height - Shipping Position
59.8 in 1520 mm
O/A Shipping Height
97.6 in 2480 mm
Swing Bearing - Height
22.2 in 565 mm
O/A Undercarriage Length
87.4 in 2220 mm
Overall Shipping Length*
189 in 4800 mm
Boom Swing - Right
50 ° 50 °
Boom Swing - Left
75 ° 75 °
Track Belt/Shoe Width
11.8 in 300 mm
Track Width
70.1 in 1780 mm
Minimum Ground Clearance Below Undercarriage
12.2 in 310 mm
Stick Length
49.6 in 1260 mm
Note
Advertised power is tested per the specified standard in effect at the time of manufacture.
Dig Depth
110.6 in 2810 mm
Vertical Wall
88.6 in 2250 mm
Maximum Reach - Ground Level
202 in 5130 mm
Maximum Reach
207.5 in 5270 mm
Maximum Dig Height
193.7 in 4920 mm
Maximum Dump Clearance
137.4 in 3490 mm
Boom In Reach
69.3 in 1760 mm
Tail Swing without Counterweight
35 in 890 mm
Tail Swing - with Extra Counterweight
39.6 in 1005 mm
Maximum Blade Depth
21.1 in 535 mm
Maximum Blade Height
15.2 in 385 mm
Boom Height - Shipping Position
59.8 in 1520 mm
O/A Shipping Height
97.6 in 2480 mm
Swing Bearing - Height
22.2 in 565 mm
O/A Undercarriage Length
87.4 in 2220 mm
Overall Shipping Length*
189 in 4800 mm
Boom Swing - Right
50 ° 50 °
Boom Swing - Left
75 ° 75 °
Track Belt/Shoe Width
11.8 in 300 mm
Track Width
70.1 in 1780 mm
Minimum Ground Clearance Below Undercarriage
12.2 in 310 mm
Stick Length
49.6 in 1260 mm
Note
Advertised power is tested per the specified standard in effect at the time of manufacture.
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).
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)
Note
Advertised power is tested per the specified standard in effect at the time of manufacture.
Recyclability
95%

Equipment

Compatible Attachments

Impulse Force
3596.94 lb/16 kN
Impact Frequency
2200 bpm
Impulse Force
6294.65 lb/28 kN
Impact Frequency
2200 bpm
Length
30.4 in/771 mm
Stored Height
11.5 in/291 mm
Width
11.8 in/300 mm
Capacity
4.9 ft³/140 l
Machine Class
3-4 Ton Mini Excavator
Weight
264.6 lb/120 kg
Machine Class
3-4 Ton Mini Excavators
Weight
299.8 lb/136 kg
Shank Length
19.3 in/490 mm
Weight
99.2 lb/45 kg
Width
12.6 in/320 mm
Capacity
2.8 ft³/80 l
Width
43 in/1100 mm
Capacity
5.3 ft³/150 l
Width
36 in/914 mm
Capacity
7.1 ft³/199.89 l
Width
24.4 in/619 mm
Capacity
4.2 ft³/118.9 l
Width
20 in/500 mm
Weight
130.1 lb/59 kg
Width
32 in/800 mm
Weight
158.7 lb/72 kg
Width
12 in/305 mm
Capacity
1.7 ft³/48.09 l
Weight
90.4 lb/41 kg
Width
9.9 in/252 mm
Weight
81.6 lb/37 kg
Width
10.6 in/269 mm
Width
40 in/1000 mm
Weight
240.1 lb/108.9 kg
Width
55.1 in/1400 mm
Weight
259.2 lb/117.59 kg
Compaction Width
15.7 in/399 mm
Number of Wheels
3
Compaction Width
21.8 in/553 mm
Number of Wheels
4
Compaction Width
10.7 in/271 mm
Number of Wheels
2
Drive Shaft Torque at Maximum Pressure
1699.3 lb/ft/2304 N·m
Drive Method
Gerotor Motor - Direct Drive
Drive Shaft Torque at Maximum Pressure
3038.8 lb/ft/4120 N·m
Drive Method
Gerotor Motor - Single Planetary Reduction

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