The Caterpillar 303.5 is a compact mini excavator designed for small construction, landscaping, utility, and site preparation work. It is part of Caterpillar's 3-ton class mini excavator range and is commonly used where maneuverability and reduced ground disturbance are important. The machine typically features a zero tail swing design, hydraulic versatility, and a compact operating footprint for work in confined areas. Depending on configuration and model year, the 303.5 may include an enclosed cab or canopy, auxiliary hydraulics, and a dozer blade. It is used for digging, trenching, grading, backfilling, and material handling on residential and commercial job sites.
Blades
Caterpillar 303.5 Mini Excavator Blades specifications
Blade Height
14.60 in (37.08 cm)
Blade Lift Height
16.50 in (41.91 cm)
Blade Width
5.10 ft (1.55 m)
Dig Depth
13.80 in (35.05 cm)
Dimensions
Caterpillar 303.5 Mini Excavator Dimensions specifications
Center Ground Clearance
1.00 ft (0.30 m)
Height - Over Cab
8.00 ft (2.44 m)
Height - Over Canopy
8.00 ft (2.44 m)
Maximum Cutting Height - Long Stick
17.30 ft (5.27 m)
Maximum Cutting Height - Standard Stick
16.60 ft (5.06 m)
Maximum Digging Depth - Long Stick
11.80 ft (3.60 m)
Maximum Digging Depth - Standard Stick
10.40 ft (3.17 m)
Maximum Dump Height - Long Stick
12.60 ft (3.84 m)
Maximum Dump Height - Standard Stick
11.90 ft (3.63 m)
Maximum Horizontal Reach - Long Stick
18.60 ft (5.67 m)
Maximum Horizontal Reach - Standard Stick
17.40 ft (5.30 m)
Maximum Reach - Ground Level - Long Stick
18.20 ft (5.55 m)
Maximum Reach - Ground Level - Standard Stick
17.00 ft (5.18 m)
Maximum Vertical Dig Depth - Long Stick
9.10 ft (2.77 m)
Maximum Vertical Dig Depth - Standard Stick
7.90 ft (2.41 m)
Shipping Length
16.80 ft (5.12 m)
Stick Length - Long Stick
5.50 ft (1.68 m)
Stick Length - Standard Stick
4.10 ft (1.25 m)
Swing Radius - Rear
4.70 ft (1.43 m)
Track Gauge
4.10 ft (1.25 m)
Track Shoe Width
12.00 ft (3.66 m)
Width - Over Track
5.10 ft (1.55 m)
Width - Upper Structure
5.10 ft (1.55 m)
Electrical System
Caterpillar 303.5 Mini Excavator Electrical System specifications
Electrical System Type
Twelve-volt system
Engine
Caterpillar 303.5 Mini Excavator Engine specifications
Bore
3.40 in (8.64 cm)
Displacement
91.30 cu in (1,496.14 cu cm)
Engine Model
3013
Gross Power
27.00 hp (20.13 kw)
Net Power
25.00 hp (18.64 kw)
Stroke
3.60 in (9.14 cm)
Hydraulic System
Caterpillar 303.5 Mini Excavator Hydraulic System specifications
Auxiliary Circuit - Primary (245 bar/3,553 psi)
17.40 gpm (65.86 lpm)
Digging Force - Bucket
5,742.00 lbs (2,604.53 kg)
Digging Force - Stick - Long
3,080.00 lbs (1,397.07 kg)
Digging Force - Stick - Standard
4,114.00 lbs (1,866.08 kg)
Operating Pressure - Equipment
2987 psi
Operating Pressure - Swing
2494 psi
Operating Pressure - Travel
2987 psi
Pump - Gear (Single)
7.54 gpm (28.54 lpm)
Pump - Gear (Tandem)
10.01 gpm (37.89 lpm)
Service Refill Capacities
Caterpillar 303.5 Mini Excavator Service Refill Capacities specifications
Cooling System TAG
1.30 gal (4.92 l)
Engine Oil
1.50 gal (5.68 l)
Fuel Tank
14.30 gal (54.13 l)
Hydraulic System
18.20 gal (68.89 l)
Hydraulic Tank
12.00 gal (45.42 l)
Swing System
Caterpillar 303.5 Mini Excavator Swing System specifications
Boom Swing - Left - With Stop
55 degrees
Boom Swing - Left - Without Stop
90 degrees
Boom Swing - Right
50 degrees
Machine Swing Speed
9.3 rpm
Swing System Type
Hydraulic Motor Driven
Travel System
Caterpillar 303.5 Mini Excavator Travel System specifications
Maximum Traction Force - High Speed
3,825.00 lbs (1,734.99 kg)
Maximum Traction Force - Low Speed
6,750.00 lbs (3,061.75 kg)
Travel Speed - High
2.80 mph (4.51 kph)
Travel Speed - Low
1.60 mph (2.57 kph)
Weights
Caterpillar 303.5 Mini Excavator Weights specifications
Operating Weight - With Cab
7,810.00 lbs (3,542.56 kg)
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