Big EOFY Savings on Cat Compact machines until 30 June 2026. T&Cs apply. View Promotion

Big EOFY Savings on Cat Compact machines until 30 June 2026. T&Cs apply. View Promotion

306 CR Mini Hydraulic Excavator

306 CR

Mini Excavators
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.
Net Power
55.9 hp/41.7 kW
Gross Power - ISO 14396
57.9 hp/43.2 kW
Displacement
148 in³/2.43 l
Bore
3.4 in/87 mm

Key Features

Specifications

Metric | Imperial
Engine Expand Collapse
Net Power
55.9 hp 41.7 kW
Gross Power - ISO 14396
57.9 hp 43.2 kW
Displacement
148 in³ 2.43 l
Bore
3.4 in 87 mm
Stroke
4 in 102.4 mm
Engine Model
Cat C2.4 Turbo
Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269
55.9 hp 41.7 kW
Operating Weight
15766 lb 7150 kg
Minimum Operating Weight with Canopy*
14134 lb 6410 kg
Maximum Operating Weight with Canopy**
15633 lb 7090 kg
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 7150 kg
Minimum Operating Weight with Cab*
14266 lb 6470 kg
Note (1)
*Minimum Weight is based on rubber tracks, operator, full fuel tank, standard stick, fixed blade and no bucket.
Counterweight
551 lb 250 kg
Long Stick
97 lb 44 kg
Steel Tracks with Pads
827 lb 375 kg
Angle Blade
225 lb 102 kg
XTC Carriage (no tool)
141 lb 64 kg
Ground Pressure - Minimum Weight
5.1 psi 35.4 kPa
Ground Pressure - Maximum Weight
5.7 psi 39.1 kPa
Gradeability - Maximum
30 degrees
Maximum Traction Force - High Speed
6969 lbf 31 kN
Maximum Traction Force - Low Speed
12589 lbf 56 kN
Travel Speed - High
3.1 mile/h 5 km/h
Travel Speed - Low
1.7 mile/h 2.8 km/h
Cooling System
2.6 gal (US) 10 l
Hydraulic System
27.5 gal (US) 104 l
Hydraulic Tank
14 gal (US) 53 l
Engine Oil
2.1 gal (US) 8 l
Fuel Tank
34.3 gal (US) 130 l
Operating Pressure - Travel
3553 psi 24500 kPa
Auxiliary Circuit - Primary - Flow
24 gpm 90 L/min
Digging Force - Bucket
11578 lbf 51.5 kN
Auxiliary Circuit - Primary - Pressure
3553 psi 24500 kPa
Type
Load Sensing Hydraulics with Variable Displacement Piston Pump
Auxiliary Circuit - Secondary - Flow
9 gpm 33 L/min
Operating Pressure - Equipment
3553 psi 24500 kPa
Auxiliary Circuit - Secondary - Pressure
3553 psi 24500 kPa
Digging Force - Stick - Standard
6632 lbf 29.5 kN
Operating Pressure - Swing
3263 psi 22500 kPa
Digging Force - Stick - Long
5957 lbf 26.5 kN
Pump Flow at 2,400 rpm
40 gpm 151 L/min
Boom Swing - Right
65 degrees
Boom Swing - Left
60 degrees
Machine Swing Speed
11 r/min 11 r/min
Straight Blade Width
78 in 1980 mm
Angle Blade Width
78 in 1980 mm
Straight Blade Height
15.4 in 390 mm
Angle Blade Height
15.7 in 400 mm
Top Guard
ISO 10262:1998 (Level II)
Roll Over Protective Structure (ROPS)
ISO 12117-2:2008
Tip Over Protective Structure (TOPS)
ISO 12117:1997
Operator Sound Pressure (ISO 6396:2008)
72 dB(A) 72 dB(A)
Average Exterior Sound Pressure (ISO 6395:2008)
99 dB(A) 99 dB(A)
Note
European Union Directive “2000/14/EC”
Track Belt/Shoe Width
16 in 400 mm
Maximum Reach
248 in 6295 mm
Stick Length
62 in 1580 mm
Vertical Wall
107 in 2710 mm
Swing Bearing - Height
27 in 672 mm
Maximum Reach - Ground Level
241 in 6130 mm
Maximum Blade Height
16 in 415 mm
Ground Clearance
12 in 306 mm
Boom In Reach
98 in 2485 mm
Boom Swing - Right
65 degrees
Transport Height
69 in 1755 mm
Tail Swing with Counterweight
58 in 1475 mm
Cab Height
100 in 2545 mm
Width over Upper House
77 in 1950 mm
Maximum Dump Clearance
170 in 4325 mm
Tail Swing without Counterweight
53 in 1350 mm
Boom Swing - Left
60 degrees
O/A Undercarriage Length
102 in 2580 mm
Maximum Dig Height
230 in 5835 mm
Maximum Blade Depth
24 in 600 mm
O/A Track Width
78 in 1980 mm
Dig Depth
146 in 3710 mm
O/A Shipping Length
235 in 5975 mm
Dig Depth
146 in 3710 mm
Maximum Blade Height
16 in 415 mm
O/A Track Width
78 in 1980 mm
Track Belt/Shoe Width
16 in 400 mm
Tail Swing with Counterweight
58 in 1475 mm
Vertical Wall
107 in 2710 mm
Boom In Reach
98 in 2485 mm
Maximum Blade Depth
24 in 600 mm
Maximum Dig Height
230 in 5835 mm
Transport Height
69 in 1755 mm
Stick Length
62 in 1580 mm
Ground Clearance
12 in 306 mm
Swing Bearing - Height
27 in 672 mm
Width over Upper House
77 in 1950 mm
O/A Undercarriage Length
102 in 2580 mm
O/A Shipping Length
235 in 5975 mm
Cab Height
100 in 2545 mm
Maximum Reach
248 in 6295 mm
Boom Swing - Left
60 degrees
Tail Swing without Counterweight
53 in 1350 mm
Boom Swing - Right
65 degrees
Maximum Dump Clearance
170 in 4325 mm
Maximum Reach - Ground Level
241 in 6130 mm
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.
Recyclability
96%

Equipment

Compatible Attachments

Impulse Force
6294.65 lb/28 kN
Impact Frequency
2200 bpm
Impulse Force
8992.36 lb/40 kN
Impact Frequency
2200 bpm
Length
35.7 in/907 mm
Stored Height
13.1 in/333 mm
Width
13.8 in/350 mm
Capacity
8.4 ft³/239 l
Machine Class
5-6 Ton Mini Excavators
Weight
410.1 lb/186 kg
Machine Class
5-6 Ton Mini Excavators
Weight
394.6 lb/179 kg
Machine Class
5-6 Ton Mini Excavators
Weight
463 lb/210 kg
Weight
255.7 lb/116 kg
Overall Width
11.7 in/298 mm
Weight
262.3 lb/119 kg
Width
44.3 in/1125 mm
Shank Length
26.6 in/676 mm
Weight
134 lb/60.79 kg
Height
21.7 in/550 mm
Width
51 in/1300 mm
Width
51 in/1300 mm
Capacity
8.8 ft³/250 l
Width
12.6 in/320 mm
Capacity
4.2 ft³/120 l
Width
47 in/1200 mm
Capacity
7.4 ft³/210 l
Width
47 in/1200 mm
Capacity
7.4 ft³/210 l
Width
24.4 in/620 mm
Capacity
8.5 ft³/240 l
Width
80.2 in/2036 mm
Capacity
0.52 yd³/0.4 m³
Overall Width
54.6 in/1388 mm
Working Width
31.3 in/794 mm
Tip Force
43.3 Sh Ton/385 kN
Rotation
360 Degrees
Width
12 in/305 mm
Capacity
2.9 ft³/82.09 l
Width
20 in/508 mm
Capacity
5.1 ft³/144.39 l
Width
24.4 in/619 mm
Capacity
6.4 ft³/181.19 l
Width
30 in/762 mm
Capacity
8.5 ft³/240.69 l
Width
36 in/914 mm
Capacity
10.6 ft³/300.2 l
Width
24.4 in/619 mm
Capacity
4.6 ft³/130.3 l
Width
36 in/914 mm
Capacity
7.8 ft³/220.89 l
Width
24 in/600 mm
Weight
209.4 lb/95 kg
B6s
Operating Weight - With Tool
610.7 lb/277 kg
Energy Class
501.5 ft·lbf/680 J
B8s
Operating Weight - With Tool
758.4 lb/344 kg
Energy Class
848.2 ft·lbf/1150 J
Operating Weight - With Tool
859.8 lb/390 kg
Energy Class
800.3 ft·lbf/1085 J
Width
47.2 in/1200 mm
Capacity
9.2 ft³/259.89 l
Width
59.1 in/1500 mm
Capacity
11.6 ft³/329.89 l
Weight
169.8 lb/77 kg
Width
10.7 in/272 mm
Weight
123.5 lb/56 kg
Width
11.7 in/298 mm
Working Width
39.4 in/1000 mm
Required Hydraulics
Standard Flow
Grapple Area
5.7 ft³/160 l
Weight
731.9 lb/332 kg
Compaction Width
15.7 in/399 mm
Number of Wheels
3
Compaction Width
21.8 in/553 mm
Number of Wheels
4
Compaction Width
10.7 in/271 mm
Number of Wheels
2
Working Width
13.8 in/350 mm
Maximum Cutting Depth
4.7 in/120 mm
Drive Shaft Torque at Maximum Pressure
3038.8 lb/ft/4120 N·m
Drive Method
Gerotor Motor - Single Planetary Reduction
Drive Shaft Torque at Maximum Pressure
5034.6 lb/ft/6826 N·m
Drive Method
Gerotor Motor - Double Planetary Reduction

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