306 CR

Net Power: 55.9 hp / 41.7 kW
Operating Weight: 15766 lb / 7150 kg
Dig Depth: 162 in / 4110 mm

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.

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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

Specifications
Equipment
Related Products

Engine
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

Weights
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.

Weight Increase from Minimum Configuration
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

Travel System
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

Service Refill Capacities
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

Hydraulic System
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

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

Blade
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

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 / 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	36 in / 910 mm
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	29 in / 735 mm
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

Dimensions - Long Stick
Dig Depth	162 in / 4110 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	125 in / 3165 mm
Boom In Reach	117 in / 2960 mm
Maximum Blade Depth	24 in / 600 mm
Maximum Dig Height	241 in / 6130 mm
Transport Height	95 in / 2410 mm
Stick Length	78 in / 1980 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	234 in / 5950 mm
Cab Height	100 in / 2545 mm
Maximum Reach	263 in / 6685 mm
Boom Swing - Left	29 in / 735 mm
Tail Swing without Counterweight	53 in / 1350 mm
Boom Swing - Right	36 in / 910 mm
Maximum Dump Clearance	182 in / 4610 mm
Maximum Reach - Ground Level	257 in / 6535 mm

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%

Standard Equipment

OPERATOR ENVIRONMENT – CAB AND CANOPY
- Top Guard ISO 10262 1998 Level I
- ROPS ISO 12117-2:2008
- Stick Steer Mode
- Travel Cruise Control
- Control Pattern Changer
- Adjustable Wrist Rests
- Molded Footrests
- Removable, Washable Floor Mat
- Travel Pedals and Hand Levers
- Cat Key with Passcode Option
- Hydraulic Lockout Controls
- High Back, Suspension Seat
- Retractable Seat Belt (75 mm/3 in)
- Coat Hook
- Cup Holder
- Literature Holder
- Mounting Bosses for Top and Front Guards
- Signaling/Warning Horn
- Cab and (left side) Boom Work Lights
- Utility Space for Mobile Phone
- Next Generation Color LCD Monitor (IP66)
  – Fuel Level and Coolant Temperature Gauges
  – Maintenance and Machine Monitoring
  – Performance and Machine Adjustments
  – Numeric Security Code
  – Multiple Languages
  – Camera Ready (IP68 & IP69K)
  – Hour Meter with Wake Up Switch
OPERATOR ENVIRONMENT – CAB ONLY
- Operator Sound Pressure 72 dB(A) ISO 6396:2008
- HVAC with Automatic Temperature Control
- Integrated Lower Front Window
- Assisted Front Window Overhead Storage
- Rear Window Emergency Exit
- LED Interior Light
- 12V Power Socket
- Radio – Bluetooth®, Auxiliary, Microphone, USB (charging only)
- Skylight
- Jog dial interface
UNDERCARRIAGE
- Greased and Lubricated Track
- Hydraulic Track Adjusters
- Tie Down Eyes on Track Frame
- Dozer Straight Blade
- Dozer Float
- Bolt-on, Reversible Wear Edge
- Rubber Tracks
BOOM, STICK AND LINKAGES
- One Piece Boom (3055 mm/120.3 in)
- Standard Stick (1580 mm/62.2 in)
- Front Shovel Capable – Pin-on/Manual Coupler/Hydraulic Coupler for Cat Tools
- Thumb Ready
ELECTRICAL
- 12 Volt Electrical System
- 90 Ampere Alternator
- 650 CCA Maintenance Free Battery
- Battery Disconnect
- Circuit Breaker
- Ignition Key Stop Switch
- Signaling/Warning Horn
- Product Link™ Basic (regulations apply)
- Travel Alarm
OTHER
- Locks on External Enclosure Doors
- Lockable Fuel Cap
- Beacon Socket
- Rear Reflectors

Optional Equipment

OPERATOR ENVIRONMENT – CAB AND CANOPY
- Rain Visor
- Next Generation Advanced Monitor (below are all included with Next Generation Advanced Monitor option)
  – Touch Screen
  – Site Reference System
  – High Definition Camera Capable (IP68 & IP69K)
  – Numeric Security Code
OPERATOR ENVIRONMENT – CAB ONLY
- Cab Heat Only
- Air Suspension Heated Seat
UNDERCARRIAGE
- Angle Blade
- Extra Tool Carrier (XTC)
- Steel Tracks (450 mm/17.7 in wide)
- Steel Track with Rubber Pads
BOOM, STICK AND LINKAGES
- Long Stick (190 mm/78 in)
- Attachments including Buckets, Augers and Hammers
- 2nd Auxiliary Hydraulic Lines
- Boom Lowering Check Valve
- Stick Lowering Check Valve
- Certified Lifting Eye
ELECTRICAL
- Product Link Elite (regulations apply)
- Camera
- Rotating Beacon
GUARDING
- Heavy Duty Front Guard ISO 10262 1998 Level II
- Mesh Front Guard ISO 10262 1998 Level I
- Overhead Cab Guard ISO 10262 1998 Level II
- Polycarbonate Front Window EN356 P5A (Cab Only)
- Track Guards
OTHER
- Additional Counterweight
- Water Jacket Heater
- Refueling Pump

Pallet Fork Carriages

For moving palletized loads on construction sites, handling bagged fertilizer and seed at landscaping and nursery sites.

Model	Height	Width	Overall Width
1300 mm (51 in), Skid Steer Coupler, Class II	21.7 in / 550 mm	51 in / 1300 mm	51.7 in / 1312 mm

Equipment Management

Cat® Equipment Management gives you access to the data you need to keep your equipment on the job site and earning money. You can track equipment location and hours, monitor machine use and health, then take informed action that will keep your operation running smoothly, efficiently and profitably.

Model
VisionLink™

Flail Mowers

Flail Mowers are ideal for efficient cutting and mulching of vegetation and overgrowth.

Model	Working Width	Required Hydraulics	Overall Width
HMF110	39.4 in / 1000 mm	Standard Flow	46.6 in / 1184 mm

Heavy Duty Buckets - Mini Excavator

High strength buckets designed for maximum performance and value over a broad range of applications.

Model	Width	Capacity	Weight
305 mm (12 in), 60 L (2.1 ft3), Pin On, 45 mm (1.8 in)	12 in / 305 mm	2.1 ft³ / 59.5 l	156.5 lb / 71 kg
406 mm (16 in), 76 L (2.7 ft3), Pin On, 45 mm (1.8 in)	16 in / 406 mm	2.7 ft³ / 76.5 l	174.2 lb / 79 kg
457 mm (18 in), 88 L (3.1 ft3), Pin On, 45 mm (1.8 in)	18 in / 457 mm	3.1 ft³ / 87.8 l	194 lb / 88 kg
508 mm (20 in), 102 L (3.6 ft3), Pin On, 45 mm (1.8 in)	20 in / 508 mm	3.6 ft³ / 101.9 l	207.2 lb / 94 kg
619 mm (24 in), 130 L (4.6 ft3), Pin On, 45 mm (1.8 in)	24.4 in / 619 mm	4.6 ft³ / 130.3 l	233.7 lb / 106 kg
762 mm (30 in), 173 L (6.1 ft3), Pin On, 45 mm (1.8 in)	30 in / 762 mm	6.1 ft³ / 172.69 l	280 lb / 127 kg
914 mm (36 in), 221 L (7.8 ft3), Pin On, 45 mm (1.8 in)	36 in / 914 mm	7.8 ft³ / 220.89 l	321.9 lb / 146 kg

Heavy Duty Capacity Buckets - Mini Excavator

Optimized geometry provides maximum digging force and material volume for heavy-duty applications.

Model	Width	Capacity	Weight
305 mm (12 in), 82 L (2.9 ft3), Pin On, 45 mm (1.8 in)	12 in / 305 mm	2.9 ft³ / 82.09 l	185.2 lb / 84 kg
406 mm (16 in), 105 L (3.7 ft3), Pin On, 45 mm (1.8 in)	16 in / 406 mm	3.7 ft³ / 104.8 l	205 lb / 93 kg
457 mm (18 in), 125 L (4.4 ft3), Pin On, 45 mm (1.8 in)	18 in / 457 mm	4.4 ft³ / 124.59 l	227.1 lb / 103 kg
508 mm (20 in), 144 L (5.1 ft3), Pin On, 45 mm (1.8 in)	20 in / 508 mm	5.1 ft³ / 144.39 l	240.3 lb / 109 kg
619 mm (24 in), 181 L (6.4 ft3), Pin On, 45 mm (1.8 in)	24.4 in / 619 mm	6.4 ft³ / 181.19 l	271.2 lb / 123 kg
762 mm (30 in), 241 L (8.5 ft3), Pin On, 45 mm (1.8 in)	30 in / 762 mm	8.5 ft³ / 240.69 l	321.9 lb / 146 kg
914 mm (36 in), 300 L (10.6 ft3), Pin On, 45 mm (1.8 in)	36 in / 914 mm	10.6 ft³ / 300.2 l	368.2 lb / 167 kg

Augers

Designed to drill holes for footings, fencing, signs and trees.

Model	Drive Shaft Torque at Maximum Pressure	Drive Method	Mounting Bracket Design
A41, 5 Ton Mini Excavators	3038.8 lb/ft / 4120 N·m	Gerotor Motor - Single Planetary Reduction	5 Ton Mini Excavator Pin On
A68. 5 Ton Mini Excavators	5034.6 lb/ft / 6826 N·m	Gerotor Motor - Double Planetary Reduction	5 Ton Mini Excavator Pin On

Multi-Purpose Buckets

Powerful clamping forces for grasping large, unusually shaped objects such as trees and recycling debris.

Model	Width	Capacity	Weight
2036 mm (80 in), Bolt-On Cutting Edge	80.2 in / 2036 mm	0.52 yd³ / 0.4 m³	1016 lb / 461 kg

Ditch Cleaning Buckets - Mini Excavator

Used in ditch cleaning, sloping, grading and other finishing work.

Model	Width	Weight
1000 mm (39 in), 170 L (6 ft3), Pin On	39.4 in / 1000 mm	258.6 lb / 117.3 kg
1300 mm (51 in), 220 L (7.8 ft3), Pin On	51.2 in / 1300 mm	260.6 lb / 118.19 kg
1600 mm (63 in), 280 L (9.9 ft3), Pin On	63 in / 1600 mm	306.7 lb / 139.1 kg

Grading Buckets - Mini Excavator

For cleaning ditches, sloping, grading and other finishing work.

Model	Width	Capacity	Weight
1200 mm (47 in)	47.2 in / 1200 mm	9.2 ft³ / 259.89 l	410.5 lb / 186.19 kg
1500 mm (59 in)	59.1 in / 1500 mm	11.6 ft³ / 329.89 l	491.4 lb / 222.89 kg

Dual Lock™ Pin Grabber Couplers - Mini Excavator

Increase machine versatility and improve overall production.

Model	Weight	Width	Length
5 Ton Mini Excavators Hydraulic	169.8 lb / 77 kg	10.7 in / 272 mm	20.8 in / 528 mm

Tiltrotators

Helps you get the job done faster with the quality you expect from Cat products. Integrated to your excavator, Tiltrotators are productive, easy-to-use, and add value to your operation. Tiltrotators are a versatile solution providing enhancements to your operation.

Model	Machine Class	Weight	Interface Options: Top-Bottom
TRS6, Pin On (Pin Grabber) / S40, 5-6 Ton Mini Excavators	5-6 Ton Mini Excavators	394.6 lb / 179 kg	Pin On (Pin Grabber) Coupler / S40 Coupler

Mobile Scrap & Demolition Shears

Cat® Scrap and Demolition Shears are industry leaders in steel processing. Power and performance in a reliable package, backed by the best dealer network in the world.

Model	Tip Force	Rotation	Jaw Opening
S308	43.3 Sh Ton / 385 kN	360 Degrees	9.4 in / 240 mm