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309 CR

Mini Excavators

The Cat® 309 CR Mini Excavator delivers maximum power and performance in a mini size to help you work in a wide range of applications.

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Net Power 51.8 kW
Note The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage.
Operating Weight 9565 kg
Displacement 3.33 l
Availability Please Call Admin
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309 CR
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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 helps you get the job done more efficiently, blade float allows for easy clean up and long undercarr... Read more

HIGH FLOW

Dedicated auxiliary hydraulic pump is ideal for running power-hungry attachments while allowing the machine to simultaneously travel and multifunction. This feature allow... 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

SPECIFICATIONS FOR 309 CR

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Engine
Net Power 51.8 kW
Displacement 3.33 l
Bore 94 mm
Stroke 120 mm
Gross Power - SAE J1995 55.4 kW
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269 51.8 kW
Engine Model Cat C3.3B
Specifications
Note The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage.
Weights
Operating Weight 9565 kg
Maximum Operating Weight with Cab** 9565 kg
Note (1) *Minimum Weight is based on steel tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket.
Note (2) **Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, long stick, blade and no bucket.
Minimum Operating Weight with Cab* 8950 kg
Dimensions - Long Stick
Dig Depth 4642 mm
Maximum Dump Clearance 5072 mm
Boom In Reach 3215 mm
Vertical Wall 3404 mm
Maximum Blade Depth 671 mm
O/A Undercarriage Length 3200 mm
O/A Track Width 2470 mm
Stick Length 2358 mm
Maximum Blade Height 408 mm
Maximum Dig Height 7039 mm
Tail Swing with Counterweight 1585 mm
Maximum Reach 7637 mm
Cab Height 2541 mm
Ground Clearance 356 mm
Swing Bearing - Height 756 mm
Track Belt/Shoe Width 450 mm
Boom Swing - Left 604 mm
Boom Swing - Right 935 mm
Tail Swing without Counterweight 1450 mm
Maximum Reach - Ground Level 7460 mm
Note *Boom Height when stick is pinned in transport position with no attachments.
Note (2) ***With blade positioned at the rear of the machine.
Note (1) **Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position.
Height - Boom Transport - No Tools* 2260 mm
Overall Shipping Length - with Counterweight 7052 mm (277.6 in)***
Height - Boom Working - With Tools** 3050 mm
Overall Shipping Length - without Counterweight 7052 mm (277.6 in)***
Weight Increase from Minimum Configuration
Steel Tracks with Pads 330 kg
Long Stick 66 kg
Counterweight 250 kg
Travel System
Gradeability - Maximum 30 degrees
Ground Pressure - Minimum Weight 34.7 kPa
Ground Pressure - Maximum Weight 37.1 kPa
Travel Speed - High 4.9 km/h
Travel Speed - Low 2.6 km/h
Maximum Traction Force - High Speed 28.9 kN
Maximum Traction Force - Low Speed 84.8 kN
Service Refill Capacities
Engine Oil 11.2 l
Fuel Tank 147 l
Hydraulic System 110 l
Cooling System 10 l
Hydraulic Tank 53 l
Hydraulic System
Type Load Sensing Hydraulics with Variable Displacement Piston Pump
Operating Pressure - Swing 250 bar
Digging Force - Stick - Standard 42.3 kN
Digging Force - Stick - Long 35.7 kN
Operating Pressure - Travel 285 bar
Pump Flow at 2,400 rpm 233 l/min
Digging Force - Bucket 62 kN
Operating Pressure - Equipment 285 bar
Note Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Maximum Auxiliary Circuit - Secondary - Flow at Pump 33 l/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump 285 bar
Maximum Auxiliary Circuit - Primary - Flow at Pump 131 l/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump 285 bar
Maximum Auxiliary Circuit - High Flow - Pressure at Pump 285 bar
Maximum Auxiliary Circuit - High Flow - Flow at Pump 140 l/min
Swing System
Machine Swing Speed 10.6 r/min
Boom Swing - Right 50 degrees
Boom Swing - Left 60 degrees
Blade
Height 431 mm
Width - Wide 2640 mm
Width - Standard 2470 mm
Certification - Cab
Roll Over Protective Structure (ROPS) ISO 12117-2:2008
Top Guard ISO 10262:1998 (Level I)
Tip Over Protective Structure (TOPS) ISO 12117:1997
Sound
Average Exterior Sound Pressure (ISO 6395:2008) 99 dB(A)
Note European Union Directive "2000/14/EC"
Operator Sound Pressure (ISO 6396:2008) 72 dB(A)
Dimensions - Standard Stick
Boom Swing - Right 935 mm
Maximum Dump Clearance 4760 mm
Tail Swing without Counterweight 1450 mm
Maximum Reach - Ground Level 6949 mm
O/A Undercarriage Length 3200 mm
Cab Height 2541 mm
Swing Bearing - Height 756 mm
Maximum Dig Height 6736 mm
Track Belt/Shoe Width 450 mm
O/A Track Width 2470 mm
Ground Clearance 356 mm
Maximum Reach 7141 mm
Tail Swing with Counterweight 1585 mm
Boom In Reach 3059 mm
Vertical Wall 2991 mm
Dig Depth 4108 mm
Stick Length 1820 mm
Boom Swing - Left 604 mm
Maximum Blade Height 408 mm
Maximum Blade Depth 671 mm
Note *Boom Height when stick is pinned in transport position with no attachments.
Overall Shipping Length - without Counterweight 6774 mm
Overall Shipping Length - with Counterweight 6774 mm
Note (2) ***With blade positioned at the rear of the machine.
Note (1) **Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position.
Height - Boom Transport - No Tools* 2430 mm
Height - Boom Working - With Tools** 2660 mm
Air Conditioning System
Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.0 kg of refrigerant which has a CO2 equivalent of 1.430 metric tonnes.
Sustainability
Recyclability 96%

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