306 CR Mini Hydraulic Excavator

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The Cat® 306 CR Mini Excavator delivers maximum power and performance in a mini size to help you work in a wide range of applications.

Engine

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

Weights

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

Swing System

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

Weight Increase from Minimum Configuration

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

Travel System

Ground Pressure - Minimum Weight
5.1 psi
Ground Pressure - Maximum Weight
5.7 psi
Gradeability - Maximum
30 degrees
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)
Hydraulic System
27.5 gal (US)
Hydraulic Tank
14 gal (US)
Engine Oil
2.1 gal (US)
Fuel Tank
34.3 gal (US)

Hydraulic System

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

Blade

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

Certification - Cab

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

Sound

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

Dimensions - Standard Stick

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

Dimensions - Long Stick

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