Caterpillar 306 CR Mini Excavator Specs

Category: Mini Excavators ➔
Manufacturer: Caterpillar ➔
Model: 306 CR ➔

The Caterpillar 306 CR is a compact mini excavator designed for construction, utility, landscaping, and site preparation work. It features a reduced tail swing design for operation in confined spaces while maintaining digging performance and machine stability. The 306 CR is commonly used for trenching, grading, lifting, and material handling on urban and residential job sites. Caterpillar equips this model with a fuel-efficient diesel engine, hydraulic auxiliary options, and a comfortable operator station. Its transport-friendly size and versatile attachment compatibility make the Caterpillar 306 CR a practical choice for contractors needing a small excavator with strong productivity in tight working areas.

General Specifications

Caterpillar 306 CR Mini Excavator General Specifications specifications
Digging Depth	12.20 ft (3.72 m) - Starting 2025
Digging Reach	20.10 ft (6.13 m) - Starting 2025
Engine	55.90 hp (41.69 kw) - Starting 2025
Operating Weight	15,671.00 lbs (7,108.25 kg) - Starting 2025

Air Conditioning System

Caterpillar 306 CR Mini Excavator Air Conditioning System specifications
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. - Starting 2026

Blade

Caterpillar 306 CR Mini Excavator Blade specifications
Angle Blade Height	15.70 in (39.88 cm) - Starting 2026
Angle Blade Width	78.00 in (198.12 cm) - Starting 2026
Straight Blade Height	15.40 in (39.12 cm) - Starting 2026
Straight Blade Width	78.00 in (198.12 cm) - Starting 2026

Certification - Cab

Caterpillar 306 CR Mini Excavator Certification - Cab specifications
Roll Over Protective Structure (ROPS)	ISO 12117-2:2008 - Starting 2026
Tip Over Protective Structure (TOPS)	ISO 12117:1997 - Starting 2026
Top Guard	ISO 10262:1998 (Level II) - Starting 2026

Dimensions

Caterpillar 306 CR Mini Excavator Dimensions specifications
Height	8.33 ft (2.54 m)
Length	19.42 ft (5.92 m)
Weight	15,821.00 lbs (7,176.29 kg)
Width	6.42 ft (1.96 m)

Dimensions - Long Stick

Caterpillar 306 CR Mini Excavator Dimensions - Long Stick specifications
Boom In Reach	117.00 in (297.18 cm) - Starting 2026
Boom Swing - Left	29.00 in (73.66 cm) - Starting 2026
Boom Swing - Right	36.00 in (91.44 cm) - Starting 2026
Cab Height	100.00 in (254.00 cm) - Starting 2026
Dig Depth	162.00 in (411.48 cm) - Starting 2026
Ground Clearance	12.00 in (30.48 cm) - Starting 2026
Maximum Blade Depth	24.00 in (60.96 cm) - Starting 2026
Maximum Blade Height	16.00 in (40.64 cm) - Starting 2026
Maximum Dig Height	241.00 in (612.14 cm) - Starting 2026
Maximum Dump Clearance	182.00 in (462.28 cm) - Starting 2026
Maximum Reach	263.00 in (668.02 cm) - Starting 2026
Maximum Reach - Ground Level	257.00 in (652.78 cm) - Starting 2026
O/A Shipping Length	234.00 in (594.36 cm) - Starting 2026
O/A Track Width	78.00 in (198.12 cm) - Starting 2026
O/A Undercarriage Length	102.00 in (259.08 cm) - Starting 2026
Stick Length	78.00 in (198.12 cm) - Starting 2026
Swing Bearing - Height	27.00 in (68.58 cm) - Starting 2026
Tail Swing with Counterweight	58.00 in (147.32 cm) - Starting 2026
Tail Swing without Counterweight	53.00 in (134.62 cm) - Starting 2026
Track Belt/Shoe Width	16.00 in (40.64 cm) - Starting 2026
Transport Height	95.00 in (241.30 cm) - Starting 2026
Vertical Wall	125.00 in (317.50 cm) - Starting 2026
Width over Upper House	77.00 in (195.58 cm) - Starting 2026

Dimensions - Standard Stick

Caterpillar 306 CR Mini Excavator Dimensions - Standard Stick specifications
Boom In Reach	98.00 in (248.92 cm) - Starting 2026
Boom Swing - Left	29.00 in (73.66 cm) - Starting 2026
Boom Swing - Right	36.00 in (91.44 cm) - Starting 2026
Cab Height	100.00 in (254.00 cm) - Starting 2026
Dig Depth	146.00 in (370.84 cm) - Starting 2026
Ground Clearance	12.00 in (30.48 cm) - Starting 2026
Maximum Blade Depth	24.00 in (60.96 cm) - Starting 2026
Maximum Blade Height	16.00 in (40.64 cm) - Starting 2026
Maximum Dig Height	230.00 in (584.20 cm) - Starting 2026
Maximum Dump Clearance	170.00 in (431.80 cm) - Starting 2026
Maximum Reach	248.00 in (629.92 cm) - Starting 2026
Maximum Reach - Ground Level	241.00 in (612.14 cm) - Starting 2026
O/A Shipping Length	235.00 in (596.90 cm) - Starting 2026
O/A Track Width	78.00 in (198.12 cm) - Starting 2026
O/A Undercarriage Length	102.00 in (259.08 cm) - Starting 2026
Stick Length	62.00 in (157.48 cm) - Starting 2026
Swing Bearing - Height	27.00 in (68.58 cm) - Starting 2026
Tail Swing with Counterweight	58.00 in (147.32 cm) - Starting 2026
Tail Swing without Counterweight	53.00 in (134.62 cm) - Starting 2026
Track Belt/Shoe Width	16.00 in (40.64 cm) - Starting 2026
Transport Height	69.00 in (175.26 cm) - Starting 2026
Vertical Wall	107.00 in (271.78 cm) - Starting 2026
Width over Upper House	77.00 in (195.58 cm) - Starting 2026

Engine

Caterpillar 306 CR Mini Excavator Engine specifications
Bore	3.40 in (8.64 cm) - Starting 2026
Displacement	148.00 cu in (2,425.29 cu cm) - Starting 2026
Engine Model	Cat C2.4 Turbo - Starting 2026
Gross Power - ISO 14396	57.90 hp (43.18 kw) - Starting 2026
Net Power	55.90 hp (41.69 kw) - Starting 2026
Net Power @ 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269	55.90 hp (41.69 kw) - Starting 2026
Stroke	4.00 in (10.16 cm) - Starting 2026

Hydraulic System

Caterpillar 306 CR Mini Excavator Hydraulic System specifications
Auxiliary Circuit - Primary - Flow	24.00 gpm (90.84 lpm) - Starting 2026
Auxiliary Circuit - Primary - Pressure	3553 psi - Starting 2026
Auxiliary Circuit - Secondary - Flow	9.00 gpm (34.07 lpm) - Starting 2026
Auxiliary Circuit - Secondary - Pressure	3553 psi - Starting 2026
Digging Force - Bucket	11,578.00 lbs ft (15,697.45 nm) - Starting 2026
Digging Force - Stick - Long	5,957.00 lbs ft (8,076.50 nm) - Starting 2026
Digging Force - Stick - Standard	6,632.00 lbs ft (8,991.67 nm) - Starting 2026
Operating Pressure - Equipment	3553 psi - Starting 2026
Operating Pressure - Swing	3263 psi - Starting 2026
Operating Pressure - Travel	3553 psi - Starting 2026
Pump Flow at 2,400 rpm	40.00 gpm (151.40 lpm) - Starting 2026
Type	Load Sensing Hydraulics with Variable Displacement Piston Pump - Starting 2026

Service Refill Capacities

Caterpillar 306 CR Mini Excavator Service Refill Capacities specifications
Cooling System	2.60 gal (9.84 l) - Starting 2026
Engine Oil	2.10 gal (7.95 l) - Starting 2026
Fuel Tank	34.30 gal (129.83 l) - Starting 2026
Hydraulic System	27.50 gal (104.09 l) - Starting 2026
Hydraulic Tank	14.00 gal (52.99 l) - Starting 2026

Sound

Caterpillar 306 CR Mini Excavator Sound specifications
Average Exterior Sound Pressure (ISO 6395:2008)	99 dB(A) - Starting 2026
Operator Sound Pressure (ISO 6396:2008)	72 dB(A) - Starting 2026

Sustainability

Caterpillar 306 CR Mini Excavator Sustainability specifications
Recyclability	96% - Starting 2026

Swing System

Caterpillar 306 CR Mini Excavator Swing System specifications
Boom Swing - Left	60 degrees - Starting 2026
Boom Swing - Right	65 degrees - Starting 2026
Machine Swing Speed	11 r/min - Starting 2026

Travel System

Caterpillar 306 CR Mini Excavator Travel System specifications
Gradeability - Maximum	30 degrees - Starting 2026
Ground Pressure - Maximum Weight	5.7 psi - Starting 2026
Ground Pressure - Minimum Weight	5.1 psi - Starting 2026
Maximum Traction Force - High Speed	6,969.00 lbs ft (9,448.57 nm) - Starting 2026
Maximum Traction Force - Low Speed	12,589.00 lbs ft (17,068.17 nm) - Starting 2026
Travel Speed - High	3.10 mph (4.99 kph) - Starting 2026
Travel Speed - Low	1.70 mph (2.74 kph) - Starting 2026

Weight Increase From Minimum Configuration

Caterpillar 306 CR Mini Excavator Weight Increase From Minimum Configuration specifications
Angle Blade	225.00 lbs (102.06 kg) - Starting 2026
Counterweight	551.00 lbs (249.93 kg) - Starting 2026
Long Stick	97.00 lbs (44.00 kg) - Starting 2026
Steel Tracks with Pads	827.00 lbs (375.12 kg) - Starting 2026
XTC Carriage (no tool)	141.00 lbs (63.96 kg) - Starting 2026

Weights

Caterpillar 306 CR Mini Excavator Weights specifications
Maximum Operating Weight with Cab**	15,766.00 lbs (7,151.35 kg) - Starting 2026
Maximum Operating Weight with Canopy**	15,633.00 lbs (7,091.02 kg) - Starting 2026
Minimum Operating Weight with Cab*	14,266.00 lbs (6,470.96 kg) - Starting 2026
Minimum Operating Weight with Canopy*	14,134.00 lbs (6,411.08 kg) - Starting 2026
Operating Weight	15,766.00 lbs (7,151.35 kg) - Starting 2026