Mini Excavators

Cat 309 CR

Operating Weight

8,756kg

Power

55.4kW (75.3hp)

Width

2,470mm

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GALLERY

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. The 309 CR also features high flow hydraulics to handle power hungry attachments such as mulchers and brushcutters.

Experience 20%* greater performance with:

65% MORE LIFT CAPACITY*

25% INCREASED SWING TORQUE*

BEST IN CLASS MULTI-FUNCTION CAPABILITY

DEDICATED AUXILARY PUMP

*When compared to the previous 308 CR model.

Specifications

Operating Weight

8,756kg

Power

55.4kW (75.3hp)

Width

2,470mm

Bucket Breakout

62kN

Dig Depth

4,115mm

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Specifications

Note The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage.

Engine

Bore 94mm Displacement 3.33l Engine Model Cat C3.3B Gross Power - SAE J1995 55.4kW Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269 51.8kW Stroke 120mm

Weights

Maximum Operating Weight with Cab** 9565kg Minimum Operating Weight with Cab* 8950kg 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. Operating Weight 9565kg

Weight Increase from Minimum Configuration

Counterweight 250kg Long Stick 66kg Steel Tracks with Pads 330kg

Travel System

Gradeability - Maximum 30 degrees Ground Pressure - Maximum Weight 37.1kPa Ground Pressure - Minimum Weight 34.7kPa Maximum Traction Force - High Speed 28.9kN Maximum Traction Force - Low Speed 84.8kN Travel Speed - High 4.9km/h Travel Speed - Low 2.6km/h

Service Refill Capacities

Cooling System 10l Engine Oil 11.2l Fuel Tank 147l Hydraulic System 110l Hydraulic Tank 53l

Hydraulic System

Digging Force - Bucket 62kN Digging Force - Stick - Long 35.7kN Digging Force - Stick - Standard 42.3kN Maximum Auxiliary Circuit - High Flow - Flow at Pump 140l/min Maximum Auxiliary Circuit - High Flow - Pressure at Pump 285bar Maximum Auxiliary Circuit - Primary - Flow at Pump 131l/min Maximum Auxiliary Circuit - Primary - Pressure at Pump 285bar Maximum Auxiliary Circuit - Secondary - Flow at Pump 33l/min Maximum Auxiliary Circuit - Secondary - Pressure at Pump 285bar Note Flow and pressure are not combinable. Under load, as flow rises pressure goes down. Operating Pressure - Equipment 285bar Operating Pressure - Swing 250bar Operating Pressure - Travel 285bar Pump Flow at 2,400 rpm 233l/min Type Load Sensing Hydraulics with Variable Displacement Piston Pump

Swing System

Boom Swing - Left 60 degrees Boom Swing - Right 50 degrees Machine Swing Speed 10.6r/min

Blade

Height 431mm Width - Standard 2470mm Width - Wide 2640mm

Certification - Cab

Roll Over Protective Structure (ROPS) ISO 12117-2:2008 Tip Over Protective Structure (TOPS) ISO 12117:1997 Top Guard ISO 10262:1998 (Level I)

Sound

Average Exterior Sound Pressure (ISO 6395:2008) 99dB(A) Note European Union Directive "2000/14/EC" Operator Sound Pressure (ISO 6396:2008) 72dB(A)

Dimensions - Standard Stick

Boom In Reach 3059mm Boom Swing - Left 604mm Boom Swing - Right 935mm Cab Height 2541mm Dig Depth 4108mm Ground Clearance 356mm Height - Boom Transport - No Tools* 2430mm Height - Boom Working - With Tools** 2660mm Maximum Blade Depth 671mm Maximum Blade Height 408mm Maximum Dig Height 6736mm Maximum Dump Clearance 4760mm Maximum Reach 7141mm Maximum Reach - Ground Level 6949mm Note *Boom Height when stick is pinned in transport position with no attachments. Note (1) **Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position. Note (2) ***With blade positioned at the rear of the machine. O/A Track Width 2470mm O/A Undercarriage Length 3200mm Overall Shipping Length - with Counterweight 6774mm Overall Shipping Length - without Counterweight 6774mm Stick Length 1820mm Swing Bearing - Height 756mm Tail Swing with Counterweight 1585mm Tail Swing without Counterweight 1450mm Track Belt/Shoe Width 450mm Vertical Wall 2991mm

Dimensions - Long Stick

Boom In Reach 3215mm Boom Swing - Left 604mm Boom Swing - Right 935mm Cab Height 2541mm Dig Depth 4642mm Ground Clearance 356mm Height - Boom Transport - No Tools* 2260mm Height - Boom Working - With Tools** 3050mm Maximum Blade Depth 671mm Maximum Blade Height 408mm Maximum Dig Height 7039mm Maximum Dump Clearance 5072mm Maximum Reach 7637mm Maximum Reach - Ground Level 7460mm Note *Boom Height when stick is pinned in transport position with no attachments. Note (1) **Boom Height when stick is pinned in working position with attachments Standard Stick offers only one pin position. Note (2) ***With blade positioned at the rear of the machine. O/A Track Width 2470mm O/A Undercarriage Length 3200mm Overall Shipping Length - with Counterweight 7052 mm (277.6 in)*** Overall Shipping Length - without Counterweight 7052 mm (277.6 in)*** Stick Length 2358mm Swing Bearing - Height 756mm Tail Swing with Counterweight 1585mm Tail Swing without Counterweight 1450mm Track Belt/Shoe Width 450mm Vertical Wall 3404mm

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.

GALLERY

How does the 309 CR Compare?

Excavators Cat 309 CR

Operating Weight

8,756kg

Power

55.4kW (75.3hp)

Width

2,470mm

SELECTED MODEL

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Excavators Cat 308 CR

Operating Weight

8,146kg

Power

55.4kW (75.3hp)

Width

2,300mm

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Excavators Cat 310

Operating Weight

9,601kg

Power

55.4kW (75.3hp)

Width

2,470mm

view

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FEATURES AT A GLANCE

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 day long.
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.
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 a push of a button. The benefit of less effort and improved control is in your hands!
BIG PERFORMANCE IN A MINI DESIGN

Increased lifting, swinging, travel and multi-functioning performance helps you get the job done more efficiently, and dig-to-blade allows for easy clean up.
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 seat belt are just a few of the safety features we’ve built into the machine.
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 ser CRe panels.
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 reducing your operating costs in mind.