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303.5 CR
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.
Engine Model
Cat® C1.8
Net Power
31.6 HP/23.6 kW
Gross Power
33.3 HP/24.8 kW
Operating Weight
7734.0 lb/3508.0 kg
Key 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
UNMATCHED DEALER SUPPORT
Specifications
Metric
|
Imperial
Engine 
Engine Model
Cat® C1.8
Net Power
31.6 HP
23.6 kW
Gross Power
33.3 HP
24.8 kW
Weights
Operating Weight
7734.0 lb
3508.0 kg
Operating Weight - With Cab
8139.0 lb
3692.0 kg
Dimensions
Maximum Digging Depth - Standard Stick
9.6 ft
2880.0 mm
Maximum Reach - Ground Level - Standard Stick
16.7 ft
5060.0 mm
Maximum Cutting Height - Long Stick
16.5 ft
5030.0 mm
Shipping Height
8.2 ft
2500.0 mm
Shipping Length
15.5 ft
4730.0 mm
Maximum Cutting Height - Standard Stick
16.2 ft
4920.0 mm
Maximum Horizontal Reach - Long Stick
17.8 ft
5440.0 mm
Track Shoe Width
1.0 ft
300.0 mm
Maximum Dump Height - Long Stick
11.9 ft
3640.0 mm
Height - Over Cab
8.2 ft
2500.0 mm
Transport Width
5.8 ft
1780.0 mm
Maximum Vertical Dig Depth - Long Stick
8.2 ft
2470.0 mm
Maximum Vertical Dig Depth - Standard Stick
7.7 ft
2320.0 mm
Maximum Horizontal Reach - Standard Stick
17.1 ft
5200.0 mm
Maximum Dump Height - Standard Stick
11.5 ft
3520.0 mm
Engine Dimensions
Bore
3.4 in
87.0 mm
Stroke
4.0 in
102.4 mm
Displacement
110.0 in³
1.8 l
Travel System
Maximum Traction Force - High Speed
3799.0 lb
16.9 kN
Maximum Traction Force - Low Speed
6969.0 lb
31.0 kN
Travel Speed - High
2.8 mile/h
4.6 km/h
Travel Speed - Low
1.6 mile/h
2.6 km/h
Hydraulic System
Operating Pressure - Equipment
3553.0 psi
245.0 bar
Digging Force - Stick - Standard
4249.0 lb
18.9 kN
Digging Force - Stick - Long
3799.0 lb
16.9 kN
Digging Force - Bucket
7419.0 lb
33.0 kN
Operating Pressure - Travel
3553.0 psi
245.0 bar
Operating Pressure - Swing
2625.0 psi
181.0 bar
Auxiliary Circuit - Primary
15.9 gal/min
60.0 l/min
Auxiliary Circuit - Secondary
7.1 gal/min
27.0 l/min
Swing System
Machine Swing Speed
9.0 r/min
9.0 r/min
Boom Swing - Left - Without Stop
80.0 °
80.0 °
Boom Swing - Left - With Stop
55.0 °
55.0 °
Boom Swing - Right
50.0 °
50.0 °
Blade
Width
70.0 in
1780.0 mm
Height
12.8 in
325.0 mm
Dig Depth
18.5 in
470.0 mm
Lift Height
15.7 in
400.0 mm
Service Refill Capacities
Cooling System
1.5 gal (US)
5.5 l
Engine Oil
1.8 gal (US)
7.0 l
Hydraulic Tank
11.2 gal (US)
42.3 l
Fuel Tank
12.2 gal (US)
46.0 l
Hydraulic System
17.2 gal (US)
65.0 l
MSC Comments
MSC Spec Date
3/06
Equipment
Standard Equipment
Optional Equipment
