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305 SR

Mini Excavators

The Cat® 305 SR Mini Hydraulic Excavator delivers high performance, durability and versatility in a compact design to help you work in a variety of applications.

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Net Power 51.8 kW
Net Power - 2,200 rpm - ISO 9249:2007, 80/1269/EEC 51.8 kW
Bore 94 mm
Gross Power - SAE J1995 55.4 kW
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305 SR
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OVERVIEW

Mini Excavators Inspired by Our Customers

FEATURES & BENEFITS

ALL DAY COMFORT

A sealed and pressurized cab is equipped with an improved air conditioning system, adjustable wrist rests and a suspension seat to help keep you working comfortably all d... Read more

EASY TO OPERATE

Controls are easy to use and the intuitive Next Generation Monitor provides customizable machine operator preferences and easy to read machine information. Read more

STICK STEER TRAVEL MODE

Moving around the job site is even easier with the Cat Stick Steer option. Easily switch from traditional travel controls with levers and pedals to joystick controls with... Read more

BIG PERFORMANCE IN A MINI DESIGN

Increased lifting, swinging, travel and multi-functioning performance help you get the job done more efficiently, and dig-to-blade allows for easy clean up. Read more

SAFETY ON THE JOB SITE

Your safety is our top priority. The Cat Mini Excavator is designed to help keep you safe on the job. A back-up camera, courtesy work lights and a fluorescent retractable... Read more

SIMPLE SERVICE FOR LESS DOWNTIME

Maintenance is quick and easy on the Cat Mini Excavator. Routine check points are easy to access at ground level with grouped service points and robust service panels. Read more

LOWER OPERATING COSTS

Equipped with features such as auto idle, auto engine shutdown, and efficient hydraulics with a variable displacement pump, the Cat Mini Excavator was designed with reduc... Read more

UNMATCHED DEALER SUPPORT

Your Cat dealer is here to help you reach your business goals. From providing equipment solutions to operator training to service needs and beyond, your Cat dealer is rea... Read more

SUSTAINABILITY

The Cat® C3.3B engine meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards.Cat diesel engines are required to use ULSD (ultra-low sulfur diesel fuel... Read more

SPECIFICATIONS FOR 305 SR

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Engine
Net Power 51.8 kW
Net Power - 2,200 rpm - ISO 9249:2007, 80/1269/EEC 51.8 kW
Bore 94 mm
Gross Power - SAE J1995 55.4 kW
Stroke 120 mm
Displacement 3.33 l
Weights
Operating Weight 9245 kg
Minimum Operating Weight with Standard Stick* 8655 kg
Maximum Operating Weight with Standard Stick** 9245 kg
Note (1) *Minimum Weight is based on rubber tracks, no counterweight, operator, full fuel tank, blade, and no bucket.
Note (2) **Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, blade, and no bucket.
Weight Increase from Minimum Configuration
Steel Tracks with Pads 341 kg
Counterweight 250 kg
Travel System
Ground Pressure - Maximum Weight 40.6 kPa
Maximum Traction Force - High Speed 27.8 kN
Ground Pressure - Minimum Weight 37.9 kPa
Travel Speed - Low 3.1 km/h
Travel Speed - High 5.1 km/h
Maximum Traction Force - Low Speed 67.5 kN
Gradeability - Maximum 30 degrees
Service Refill Capacities
Hydraulic System 110 l
Hydraulic Tank 53 l
Engine Oil 11.2 l
Fuel Tank 147 l
Cooling System 10 l
Hydraulic System
Maximum Auxiliary Circuit - Primary - Flow at Pump 131 l/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump 285 bar
Operating Pressure - Equipment 285 bar
Digging Force - Stick - Standard 42.3 kN
Operating Pressure - Travel 285 bar
Pump Flow at 2,400 rpm 167 l/min
Digging Force - Bucket 62 kN
Maximum Auxiliary Circuit - Secondary - Flow at Pump 33 l/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump 285 bar
Operating Pressure - Swing 250 bar
Swing System
Boom Swing - Left 60 degrees
Machine Swing Speed 10.6 r/min
Boom Swing - Right 50 degrees
Blade
Height 431 mm
Width - Standard 2300 mm
Width - Wide 2450 mm
Sound
Operator Sound Pressure (ISO 6396:2008) 72 dB(A)
Dimensions - VAB In
Dig Depth 3815 mm
Maximum Blade Height 370 mm
Boom in Reach 3120 mm
Transport Height 2475 mm
Swing Bearing Height 756 mm
Cab Height 2541 mm
Maximum Blade Depth 407 mm
Maximum Dig Height 5220 mm
Overall Shipping Length 6450 mm
Overall Undercarriage Length 2880 mm
Maximum Reach at Ground Level 6300 mm
Overall Track Width 2300 mm
Boom Swing Right 935 mm
Ground Clearance 350 mm
Maximum Reach 6515 mm
Maximum Dump Clearance 3450 mm
Stick Length 1820 mm
Boom Swing Left 605 mm
Tail Swing without Counterweight 1450 mm
Track Belt/Shoe Width 450 mm
Tail Swing with Counterweight 1585 mm
Dimensions - VAB Out
Boom Swing Left 605 mm
Maximum Blade Depth 407 mm
Stick Length 1820 mm
Swing Bearing Height 756 mm
Cab Height 2541 mm
Maximum Dump Clearance 6285 mm
Maximum Blade Height 370 mm
Track Belt/Shoe Width 450 mm
Ground Clearance 350 mm
Tail Swing with Counterweight 1585 mm
Maximum Reach at Ground Level 7715 mm
Vertical Wall 3725 mm
Overall Track Width 2300 mm
Transport Height 2475 mm
Boom in Reach 2710 mm
Maximum Dig Height 8180 mm
Dig Depth 3460 mm
Overall Undercarriage Length 2880 mm
Boom Swing Right 935 mm
Overall Shipping Length 6450 mm
Tail Swing without Counterweight 1450 mm
Maximum Reach 7885 mm
Sustainability
Recyclability 96%

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Gross Power - ISO 14396 43.2 kW
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Net Power 26.5 kW
Gross Power 27.3 kW
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Net Power 30 kW
Operating Weight 4595 kg
Bucket Capacity 0.16 m³
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