Skip to content
309 CR Mini Hydraulic Excavator

309 CR Mini Hydraulic Excavator

Mini Excavators Inspired by Our Customers

Get a quote

More Comfort – More Performance – More Versatility

  • 4 Industry First Features

    Cat Exclusives in a Mini Excavator

  • Up to 10% Lower Total Ownership Costs

    with improved fuel efficiency and longer service intervals

  • Up to 20% More Performance

    with customizable operator settings and improvements in lift, swing, travel and multifunction

Engine

Bore 3.7 in
Displacement 203 in³
Engine Model Cat C3.3B
Gross Power - SAE J1995 74.3 HP
Net Power 69.5 HP
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269 69.5 HP
Stroke 4.7 in

Specifications

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

Weights

Maximum Operating Weight with Cab** 21091 lb
Minimum Operating Weight with Cab* 19735 lb
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 21091 lb

Dimensions - Long Stick

Boom In Reach 126.6 in
Boom Swing - Left 23.8 in
Boom Swing - Right 36.8 in
Cab Height 100 in
Dig Depth 182.8 in
Ground Clearance 14 in
Height - Boom Transport - No Tools* 89 in
Height - Boom Working - With Tools** 120.1 in
Maximum Blade Depth 26 in
Maximum Blade Height 16.1 in
Maximum Dig Height 277.1 in
Maximum Dump Clearance 199.7 in
Maximum Reach 300.7 in
Maximum Reach - Ground Level 293.7 in
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 97.2 in
O/A Undercarriage Length 126 in
Overall Shipping Length - with Counterweight 7052 mm (277.6 in)***
Overall Shipping Length - without Counterweight 7052 mm (277.6 in)***
Stick Length 92.8 in
Swing Bearing - Height 29.7 in
Tail Swing with Counterweight 62.4 in
Tail Swing without Counterweight 57.1 in
Track Belt/Shoe Width 17.7 in
Vertical Wall 134 in

Weight Increase from Minimum Configuration

Counterweight 552 lb
Long Stick 146 lb
Steel Tracks with Pads 728 lb

Travel System

Gradeability - Maximum 30 degrees
Ground Pressure - Maximum Weight 5.4 psi
Ground Pressure - Minimum Weight 5 psi
Maximum Traction Force - High Speed 6497 lb
Maximum Traction Force - Low Speed 19064 lb
Travel Speed - High 3.1 mile/h
Travel Speed - Low 1.6 mile/h

Service Refill Capacities

Cooling System 2.6 gal (US)
Engine Oil 3 gal (US)
Fuel Tank 39 gal (US)
Hydraulic System 29 gal (US)
Hydraulic Tank 14 gal (US)

Hydraulic System

Digging Force - Bucket 13943 lb
Digging Force - Stick - Long 8023 lb
Digging Force - Stick - Standard 9500 lb
Maximum Auxiliary Circuit - High Flow - Flow at Pump 37 gal/min
Maximum Auxiliary Circuit - High Flow - Pressure at Pump 4134 lbf/in
Maximum Auxiliary Circuit - Primary - Flow at Pump 35 gal/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump 4134 psi
Maximum Auxiliary Circuit - Secondary - Flow at Pump 9 gal/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump 4134 psi
Note Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Operating Pressure - Equipment 4134 psi
Operating Pressure - Swing 3626 psi
Operating Pressure - Travel 4134 psi
Pump Flow at 2,400 rpm 62 gal/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 10.6 r/min

Blade

Height 17 in
Width - Standard 97 in
Width - Wide 104 in

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

Dimensions - Standard Stick

Boom In Reach 120.4 in
Boom Swing - Left 23.8 in
Boom Swing - Right 36.8 in
Cab Height 100 in
Dig Depth 161.7 in
Ground Clearance 14 in
Height - Boom Transport - No Tools* 95.7 in
Height - Boom Working - With Tools** 104.7 in
Maximum Blade Depth 26 in
Maximum Blade Height 16.1 in
Maximum Dig Height 265.2 in
Maximum Dump Clearance 187.4 in
Maximum Reach 281.1 in
Maximum Reach - Ground Level 273.6 in
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 97.2 in
O/A Undercarriage Length 126 in
Overall Shipping Length - with Counterweight 266.7 in
Overall Shipping Length - without Counterweight 266.7 in
Stick Length 71.8 in
Swing Bearing - Height 29.7 in
Tail Swing with Counterweight 62.4 in
Tail Swing without Counterweight 57.1 in
Track Belt/Shoe Width 17.7 in
Vertical Wall 117.8 in

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%

Download resources

309 CR Product Brochure
309 CR Standard Undercarriage Product Brochure
Cat Mini Hydraulic Excavators Product Line Brochure (North America)
Cat Mini Hydraulic Excavators Product Line Brochure (Europe)
Options And Accessories Kit Guide for Mini Hydraulic Excavators
Cat Attachments for Mini Excavators Brochure
Attachment Compatibility Guide for Mini Excavators

Get info about our financing options

Get The best solution for your job site needs

Let us help.

Name(Required)
Untitled

Related Products

S308 Mobile Scrap & Demolition Shear
S308 Mobile Scrap & Demolition Shear
861 mm (34 in) Ripper
861 mm (34 in) Ripper
HM210 Mulcher
HM210 Mulcher
HM208 Mulcher
HM208 Mulcher
1312 mm (52 in) Pallet Fork Carriage
1312 mm (52 in) Pallet Fork Carriage
HMF210 Flail Mower
HMF210 Flail Mower
Hydraulic Dual Lock™ Pin Grabber Coupler For 8 Ton Mini Excavators
Hydraulic Dual Lock™ Pin Grabber Coupler For 8 Ton Mini Excavators
762 mm (30 in) Heavy Duty Rock Bucket
762 mm (30 in) Heavy Duty Rock Bucket
610 mm (24 in) Heavy Duty Rock Bucket
610 mm (24 in) Heavy Duty Rock Bucket
914 mm (36 in) Heavy Duty Bucket
914 mm (36 in) Heavy Duty Bucket
762 mm (30 in) Heavy Duty Bucket
762 mm (30 in) Heavy Duty Bucket
610 mm (24 in) Heavy Duty Bucket
610 mm (24 in) Heavy Duty Bucket
457 mm (18 in) Heavy Duty Bucket
457 mm (18 in) Heavy Duty Bucket
330 mm (13 in) Heavy Duty Bucket
330 mm (13 in) Heavy Duty Bucket
1500 mm (59 in) Grading Bucket
1500 mm (59 in) Grading Bucket
1200 mm (47 in) Grading Bucket
1200 mm (47 in) Grading Bucket
1524 mm (60 in) Ditch Cleaning Bucket
1524 mm (60 in) Ditch Cleaning Bucket
1372 mm (54 in) Ditch Cleaning Bucket
1372 mm (54 in) Ditch Cleaning Bucket
1219 mm (48 in) Ditch Cleaning Bucket
1219 mm (48 in) Ditch Cleaning Bucket
914 mm (36 in) Pin Lock High Capacity Bucket
914 mm (36 in) Pin Lock High Capacity Bucket
762 mm (30 in) Pin Lock High Capacity Bucket
762 mm (30 in) Pin Lock High Capacity Bucket
610 mm (24 in) Pin Lock High Capacity Bucket
610 mm (24 in) Pin Lock High Capacity Bucket
457 mm (18 in) Pin Lock High Capacity Bucket
457 mm (18 in) Pin Lock High Capacity Bucket
406 mm (16 in) Pin Lock High Capacity Bucket
406 mm (16 in) Pin Lock High Capacity Bucket
914 mm (36 in) Pin Lock Heavy Duty Bucket
914 mm (36 in) Pin Lock Heavy Duty Bucket
762 mm (30 in) Pin Lock Heavy Duty Bucket
762 mm (30 in) Pin Lock Heavy Duty Bucket
610 mm (24 in) Pin Lock Heavy Duty Bucket
610 mm (24 in) Pin Lock Heavy Duty Bucket
457 mm (18 in) Pin Lock Heavy Duty Bucket
457 mm (18 in) Pin Lock Heavy Duty Bucket
406 mm (16 in) Pin Lock Heavy Duty Bucket
406 mm (16 in) Pin Lock Heavy Duty Bucket
300 mm (12 in) Pin Lock Heavy Duty Bucket
300 mm (12 in) Pin Lock Heavy Duty Bucket
A68 Auger
A68 Auger

Call us today: 1-877-778-2230
or  Send us a message