309 CR Mini Hydraulic Excavator

Overview

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.

Cat Exclusives in a Mini Excavator

with improved fuel efficiency and longer service intervals

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

Net Power	69.5 hp
Displacement	203 in³
Bore	3.7 in
Stroke	4.7 in
Gross Power - SAE J1995:2014	74.3 hp
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269	69.5 hp
Engine Model	Cat C3.3B

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

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

Dig Depth	182.8 in
Maximum Dump Clearance	199.7 in
Boom In Reach	126.6 in
Vertical Wall	134 in
Maximum Blade Depth	26 in
O/A Undercarriage Length	126 in
O/A Track Width	97.2 in
Stick Length	92.8 in
Maximum Blade Height	16.1 in
Maximum Dig Height	277.1 in
Tail Swing with Counterweight	62.4 in
Maximum Reach	300.7 in
Cab Height	100 in
Ground Clearance	14 in
Swing Bearing - Height	29.7 in
Track Belt/Shoe Width	17.7 in
Boom Swing - Left	23.8 in
Boom Swing - Right	36.8 in
Tail Swing without Counterweight	57.1 in
Maximum Reach - Ground Level	293.7 in
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
Overall Shipping Length - with Counterweight	7052 mm (277.6 in)***
Height - Boom Working - With Tools**	120.1 in
Overall Shipping Length - without Counterweight	7052 mm (277.6 in)***

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

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

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

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)

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

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.