309 CR Mini Hydraulic Excavator
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.
Specifications
Equipment
Product Brochures
Attachments
Units:
Engine
Net Power
69.5 hp
51.8 kW
Specifications
Note
The 309 CR specifications are based on a machine configured with a Long (L) Undercarriage.
Weights
Operating Weight
21091 lb
9565 kg
Engine
Displacement
203 in³
3.33 l
Bore
3.7 in
94 mm
Stroke
4.7 in
120 mm
Gross Power - SAE J1995
74.3 hp
55.4 kW
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269
69.5 hp
51.8 kW
Dimensions - Long Stick
Dig Depth
182.8 in
4642 mm
Weights
Maximum Operating Weight with Cab**
21091 lb
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*
19735 lb
8950 kg
Weight Increase from Minimum Configuration
Steel Tracks with Pads
728 lb
330 kg
Long Stick
146 lb
66 kg
Counterweight
552 lb
250 kg
Travel System
Gradeability - Maximum
30 degrees
Ground Pressure - Minimum Weight
5 psi
34.7 kPa
Ground Pressure - Maximum Weight
5.4 psi
37.1 kPa
Travel Speed - High
3.1 mile/h
4.9 km/h
Travel Speed - Low
1.6 mile/h
2.6 km/h
Maximum Traction Force - High Speed
6497 lb
28.9 kN
Maximum Traction Force - Low Speed
19064 lb
84.8 kN
Service Refill Capacities
Engine Oil
3 gal (US)
11.2 l
Fuel Tank
39 gal (US)
147 l
Hydraulic System
29 gal (US)
110 l
Cooling System
2.6 gal (US)
10 l
Hydraulic Tank
14 gal (US)
53 l
Hydraulic System
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Operating Pressure - Swing
3626 psi
250 bar
Digging Force - Stick - Standard
9500 lb
42.3 kN
Digging Force - Stick - Long
8023 lb
35.7 kN
Operating Pressure - Travel
4134 psi
285 bar
Pump Flow at 2,400 rpm
62 gal/min
233 l/min
Digging Force - Bucket
13943 lb
62 kN
Operating Pressure - Equipment
4134 psi
285 bar
Note
Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Maximum Auxiliary Circuit - Secondary - Flow at Pump
9 gal/min
33 l/min
Maximum Auxiliary Circuit - Primary - Pressure at Pump
4134 psi
285 bar
Maximum Auxiliary Circuit - Primary - Flow at Pump
35 gal/min
131 l/min
Maximum Auxiliary Circuit - Secondary - Pressure at Pump
4134 psi
285 bar
Maximum Auxiliary Circuit - High Flow - Pressure at Pump
4134 lbf/in
285 bar
Maximum Auxiliary Circuit - High Flow - Flow at Pump
37 gal/min
140 l/min
Engine
Engine Model
Cat C3.3B
Swing System
Machine Swing Speed
10.6 r/min
10.6 r/min
Boom Swing - Right
50 degrees
Boom Swing - Left
60 degrees
Blade
Height
17 in
431 mm
Width - Wide
104 in
2640 mm
Width - Standard
97 in
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)
99 dB(A)
Note
European Union Directive "2000/14/EC"
Operator Sound Pressure (ISO 6396:2008)
72 dB(A)
72 dB(A)
Dimensions - Standard Stick
Boom Swing - Right
36.8 in
935 mm
Maximum Dump Clearance
187.4 in
4760 mm
Tail Swing without Counterweight
57.1 in
1450 mm
Maximum Reach - Ground Level
273.6 in
6949 mm
O/A Undercarriage Length
126 in
3200 mm
Cab Height
100 in
2541 mm
Swing Bearing - Height
29.7 in
756 mm
Maximum Dig Height
265.2 in
6736 mm
Track Belt/Shoe Width
17.7 in
450 mm
O/A Track Width
97.2 in
2470 mm
Ground Clearance
14 in
356 mm
Maximum Reach
281.1 in
7141 mm
Tail Swing with Counterweight
62.4 in
1585 mm
Boom In Reach
120.4 in
3059 mm
Vertical Wall
117.8 in
2991 mm
Dig Depth
161.7 in
4108 mm
Stick Length
71.8 in
1820 mm
Boom Swing - Left
23.8 in
604 mm
Maximum Blade Height
16.1 in
408 mm
Maximum Blade Depth
26 in
671 mm
Note
*Boom Height when stick is pinned in transport position with no attachments.
Overall Shipping Length - without Counterweight
266.7 in
6774 mm
Overall Shipping Length - with Counterweight
266.7 in
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*
95.7 in
2430 mm
Height - Boom Working - With Tools**
104.7 in
2660 mm
Dimensions - Long Stick
Maximum Dump Clearance
199.7 in
5072 mm
Boom In Reach
126.6 in
3215 mm
Vertical Wall
134 in
3404 mm
Maximum Blade Depth
26 in
671 mm
O/A Undercarriage Length
126 in
3200 mm
O/A Track Width
97.2 in
2470 mm
Stick Length
92.8 in
2358 mm
Maximum Blade Height
16.1 in
408 mm
Maximum Dig Height
277.1 in
7039 mm
Tail Swing with Counterweight
62.4 in
1585 mm
Maximum Reach
300.7 in
7637 mm
Cab Height
100 in
2541 mm
Ground Clearance
14 in
356 mm
Swing Bearing - Height
29.7 in
756 mm
Track Belt/Shoe Width
17.7 in
450 mm
Boom Swing - Left
23.8 in
604 mm
Boom Swing - Right
36.8 in
935 mm
Tail Swing without Counterweight
57.1 in
1450 mm
Maximum Reach - Ground Level
293.7 in
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*
89 in
2260 mm
Overall Shipping Length - with Counterweight
7052 mm (277.6 in)***
Height - Boom Working - With Tools**
120.1 in
3050 mm
Overall Shipping Length - without Counterweight
7052 mm (277.6 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%
Standard Equipment
ENGINE
HYDRAULICS
OPERATOR ENVIRONMENT
UNDERCARRIAGE
BOOM, STICK AND LINKAGES
ELECTRICAL
OTHER
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