306 CR Mini Hydraulic Excavator

306 CR Mini Hydraulic Excavator

Mini Excavators Inspired by Our Customers

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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	3.4 in
Displacement	148 in³
Engine Model	Cat C2.4 Turbo
Gross Power - ISO 14396	57.9 hp
Net Power	55.9 hp
Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269	55.9 hp
Stroke	4 in

Weights

Maximum Operating Weight with Cab**	15766 lb
Maximum Operating Weight with Canopy**	15633 lb
Minimum Operating Weight with Cab*	14266 lb
Minimum Operating Weight with Canopy*	14134 lb
Note (1)	*Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, fixed blade and no bucket.
Note (2)	**Maximum Weight is based on steel tracks with pads, extra counterweight, operator, full fuel tank, long stick, fixed blade and no bucket.
Operating Weight	15766 lb

Weight Increase from Minimum Configuration

Angle Blade	225 lb
Counterweight	551 lb
Long Stick	97 lb
Steel Tracks with Pads	827 lb
XTC Carriage (no tool)	141 lb

Travel System

Gradeability - Maximum	30 degrees
Ground Pressure - Maximum Weight	5.7 psi
Ground Pressure - Minimum Weight	5.1 psi
Maximum Traction Force - High Speed	6969 lbf
Maximum Traction Force - Low Speed	12589 lbf
Travel Speed - High	3.1 mile/h
Travel Speed - Low	1.7 mile/h

Service Refill Capacities

Cooling System	2.6 gal (US)
Engine Oil	2.1 gal (US)
Fuel Tank	34.3 gal (US)
Hydraulic System	27.5 gal (US)
Hydraulic Tank	14 gal (US)

Hydraulic System

Auxiliary Circuit - Primary - Flow	24 gal/min
Auxiliary Circuit - Primary - Pressure	3553 psi
Auxiliary Circuit - Secondary - Flow	9 gal/min
Auxiliary Circuit - Secondary - Pressure	3553 psi
Digging Force - Bucket	11578 lbf
Digging Force - Stick - Long	5957 lbf
Digging Force - Stick - Standard	6632 lbf
Operating Pressure - Equipment	3553 psi
Operating Pressure - Swing	3263 psi
Operating Pressure - Travel	3553 psi
Pump Flow at 2,400 rpm	40 gal/min
Type	Load Sensing Hydraulics with Variable Displacement Piston Pump

Swing System

Boom Swing - Left	60 degrees
Boom Swing - Right	65 degrees
Machine Swing Speed	11 r/min

Blade

Angle Blade Height	15.7 in
Angle Blade Width	78 in
Straight Blade Height	15.4 in
Straight Blade Width	78 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 II)

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	98 in
Boom Swing - Left	29 in
Boom Swing - Right	36 in
Cab Height	100 in
Dig Depth	146 in
Ground Clearance	12 in
Maximum Blade Depth	24 in
Maximum Blade Height	16 in
Maximum Dig Height	230 in
Maximum Dump Clearance	170 in
Maximum Reach	248 in
Maximum Reach - Ground Level	241 in
O/A Shipping Length	235 in
O/A Track Width	78 in
O/A Undercarriage Length	102 in
Stick Length	62 in
Swing Bearing - Height	27 in
Tail Swing with Counterweight	58 in
Tail Swing without Counterweight	53 in
Track Belt/Shoe Width	16 in
Transport Height	69 in
Vertical Wall	107 in
Width over Upper House	77 in

Dimensions - Long Stick

Boom In Reach	117 in
Boom Swing - Left	29 in
Boom Swing - Right	36 in
Cab Height	100 in
Dig Depth	162 in
Ground Clearance	12 in
Maximum Blade Depth	24 in
Maximum Blade Height	16 in
Maximum Dig Height	241 in
Maximum Dump Clearance	182 in
Maximum Reach	263 in
Maximum Reach - Ground Level	257 in
O/A Shipping Length	234 in
O/A Track Width	78 in
O/A Undercarriage Length	102 in
Stick Length	78 in
Swing Bearing - Height	27 in
Tail Swing with Counterweight	58 in
Tail Swing without Counterweight	53 in
Track Belt/Shoe Width	16 in
Transport Height	95 in
Vertical Wall	125 in
Width over Upper House	77 in

Air Conditioning System

Air Conditioning

The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1287). The system contains 0.9 kg of refrigerant which has a CO2 equivalent of 1.287 metric tonnes.

Sustainability

Recyclability

96%

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Comments

Engine

Bore	3.4 in
Displacement	148 in³
Engine Model	Cat C2.4 Turbo
Gross Power - ISO 14396	57.9 hp
Net Power	55.9 hp
Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269	55.9 hp
Stroke	4 in

Weights

Maximum Operating Weight with Cab**	15766 lb
Maximum Operating Weight with Canopy**	15633 lb
Minimum Operating Weight with Cab*	14266 lb
Minimum Operating Weight with Canopy*	14134 lb
Note (1)	*Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, fixed blade and no bucket.
Note (2)	**Maximum Weight is based on steel tracks with pads, extra counterweight, operator, full fuel tank, long stick, fixed blade and no bucket.
Operating Weight	15766 lb

Weight Increase from Minimum Configuration

Angle Blade	225 lb
Counterweight	551 lb
Long Stick	97 lb
Steel Tracks with Pads	827 lb
XTC Carriage (no tool)	141 lb

Travel System

Gradeability - Maximum	30 degrees
Ground Pressure - Maximum Weight	5.7 psi
Ground Pressure - Minimum Weight	5.1 psi
Maximum Traction Force - High Speed	6969 lbf
Maximum Traction Force - Low Speed	12589 lbf
Travel Speed - High	3.1 mile/h
Travel Speed - Low	1.7 mile/h

Service Refill Capacities

Cooling System	2.6 gal (US)
Engine Oil	2.1 gal (US)
Fuel Tank	34.3 gal (US)
Hydraulic System	27.5 gal (US)
Hydraulic Tank	14 gal (US)

Hydraulic System

Auxiliary Circuit - Primary - Flow	24 gal/min
Auxiliary Circuit - Primary - Pressure	3553 psi
Auxiliary Circuit - Secondary - Flow	9 gal/min
Auxiliary Circuit - Secondary - Pressure	3553 psi
Digging Force - Bucket	11578 lbf
Digging Force - Stick - Long	5957 lbf
Digging Force - Stick - Standard	6632 lbf
Operating Pressure - Equipment	3553 psi
Operating Pressure - Swing	3263 psi
Operating Pressure - Travel	3553 psi
Pump Flow at 2,400 rpm	40 gal/min
Type	Load Sensing Hydraulics with Variable Displacement Piston Pump

Swing System

Boom Swing - Left	60 degrees
Boom Swing - Right	65 degrees
Machine Swing Speed	11 r/min

Blade

Angle Blade Height	15.7 in
Angle Blade Width	78 in
Straight Blade Height	15.4 in
Straight Blade Width	78 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 II)

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	98 in
Boom Swing - Left	29 in
Boom Swing - Right	36 in
Cab Height	100 in
Dig Depth	146 in
Ground Clearance	12 in
Maximum Blade Depth	24 in
Maximum Blade Height	16 in
Maximum Dig Height	230 in
Maximum Dump Clearance	170 in
Maximum Reach	248 in
Maximum Reach - Ground Level	241 in
O/A Shipping Length	235 in
O/A Track Width	78 in
O/A Undercarriage Length	102 in
Stick Length	62 in
Swing Bearing - Height	27 in
Tail Swing with Counterweight	58 in
Tail Swing without Counterweight	53 in
Track Belt/Shoe Width	16 in
Transport Height	69 in
Vertical Wall	107 in
Width over Upper House	77 in

Dimensions - Long Stick

Boom In Reach	117 in
Boom Swing - Left	29 in
Boom Swing - Right	36 in
Cab Height	100 in
Dig Depth	162 in
Ground Clearance	12 in
Maximum Blade Depth	24 in
Maximum Blade Height	16 in
Maximum Dig Height	241 in
Maximum Dump Clearance	182 in
Maximum Reach	263 in
Maximum Reach - Ground Level	257 in
O/A Shipping Length	234 in
O/A Track Width	78 in
O/A Undercarriage Length	102 in
Stick Length	78 in
Swing Bearing - Height	27 in
Tail Swing with Counterweight	58 in
Tail Swing without Counterweight	53 in
Track Belt/Shoe Width	16 in
Transport Height	95 in
Vertical Wall	125 in
Width over Upper House	77 in

Air Conditioning System

Air Conditioning

Sustainability

Recyclability

96%

306 CR Mini Hydraulic Excavator

Mini Excavators Inspired by Our Customers

More Comfort – More Performance – More Versatility

4 Industry First Features

Up to 10% Lower Total Ownership Costs

Up to 20% More Performance

306 CR Mini Hydraulic Excavator

Engine

Weights

Weight Increase from Minimum Configuration

Travel System

Service Refill Capacities

Hydraulic System

Swing System

Blade

Certification - Cab

Sound

Dimensions - Standard Stick

Dimensions - Long Stick

Air Conditioning System

Sustainability

Download resources

306 CR 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.

Engine

Weights

Weight Increase from Minimum Configuration

Travel System

Service Refill Capacities

Hydraulic System

Swing System

Blade

Certification - Cab

Sound

Dimensions - Standard Stick

Dimensions - Long Stick

Air Conditioning System

Sustainability