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CAT 308 CR Mini Excavator Specs & Review

The CAT 308 CR Mini Excavator is a compact and versatile piece of heavy machinery designed and manufactured by Caterpillar Inc., a renowned leader in the construction equipment industry. Known for its efficiency and precision, the CAT 308 CR Mini Excavator has become a popular choice for various construction and excavation projects.

CAT 308 CR Mini Excavator Specs

This compact excavator combines power, agility, and advanced technology to deliver exceptional performance in confined spaces, making it ideal for urban construction sites and other applications where maneuverability is crucial.

CAT 308 CR Mini Excavator Specs

In this introduction, we will explore the key features and capabilities that make the CAT 308 CR Mini Excavator a standout choice in the world of compact construction equipment.

CAT 308 CR Engine

Net Power 69.5 HP
Engine Model Cat C3.3B
Stroke 4.7 in
Bore 3.7 in
Gross Power - SAE J1995 74.3 HP
Displacement 203 in³
Rated Net Power - 2,200 rpm - U.S. EPA Tier 4 Final/EU Stage V - ISO 9249/EEC 80/1269 69.5 HP

CAT 308 CR Mini Excavator

CAT 308 CR Weights

Operating Weight 20077 lb
Note (1) *Minimum Weight is based on rubber tracks, no counterweight, operator, full fuel tank, standard stick, blade and no bucket.
Note (2) **Maximum Weight is based on steel tracks with rubber pads, counterweight, operator, full fuel tank, long stick, blade and no bucket.
Maximum Operating Weight with Cab** 20077 lb
Minimum Operating Weight with Cab* 18610 lb

Weight Increase from Minimum Configuration

Steel Tracks with Pads 752 lb
Counterweight 552 lb
Long Stick 146 lb

CAT 308 CR Mini Excavator at Work

CAT 308 CR Mini Excavator Travel System

Maximum Traction Force - High Speed 6250 lb
Ground Pressure - Maximum Weight 5.8 psi
Ground Pressure - Minimum Weight 5.4 psi
Travel Speed - High 3.2 mile/h
Travel Speed - Low 1.9 mile/h
Maximum Traction Force - Low Speed 15175 lb
Gradeability - Maximum 30 degrees

CAT 308 CR Mini Excavator Service Refill Capacities

Fuel Tank 39 gal (US)
Hydraulic System 29 gal (US)
Hydraulic Tank 14 gal (US)
Cooling System 2.6 gal (US)
Engine Oil 3 gal (US)

CAT 308 CR Hydraulic System

Digging Force - Bucket 13946 lb
Operating Pressure - Travel 4134 psi
Operating Pressure - Swing 3626 psi
Operating Pressure - Equipment 4134 psi
Digging Force - Stick - Long 8032 lb
Type Load Sensing Hydraulics with Variable Displacement Piston Pump
Note Flow and pressure are not combinable. Under load, as flow rises pressure goes down.
Pump Flow at 2,400 rpm 44 gal/min
Digging Force - Stick - Standard 9509 lb
Maximum Auxiliary Circuit - Primary - Pressure at Pump 4134 psi
Maximum Auxiliary Circuit - Secondary - Pressure at Pump 4134 psi
Maximum Auxiliary Circuit - Primary - Flow at Pump 35 gal/min
Maximum Auxiliary Circuit - Secondary - Flow at Pump 9 gal/min

CAT 308 CR Mini Excavator Cab interior

CAT 308 CR Mini Excavator Swing System

Machine Swing Speed 10.6 r/min
Boom Swing - Right 50 degrees
Boom Swing - Left 60 degrees

CAT 308 CR Mini Excavator Blade

Height 17 in
Width - Standard 90.6 in
Width - Wide 96.5 in

CAT 308 CR Cab Certification

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

CAT 308 CR Mini Excavator Dimensions

Cab Height 100 in
Vertical Wall 117.8 in
Boom In Reach 120.4 in
Tail Swing with Counterweight 62.4 in
Boom Swing - Right 36.8 in
Track Belt/Shoe Width 17.7 in
Maximum Reach 281.1 in
Stick Length 71.7 in
Maximum Blade Height 14.6 in
Boom Swing - Left 23.8 in
Maximum Blade Depth 16 in
O/A Track Width 90.6 in
Maximum Dig Height 265.2 in
Maximum Dump Clearance 187.4 in
Maximum Reach - Ground Level 273.6 in
Tail Swing without Counterweight 57.1 in
O/A Undercarriage Length 113.4 in
Swing Bearing - Height 29.7 in
Ground Clearance 13.8 in
Dig Depth 161.7 in
Note *Boom Height when stick is pinned in transport position with no attachments.
Overall Shipping Length - with Counterweight 264 in
Note (1) **Boom Height when stick is pinned in working position with attachments. Standard Stick offers only one pin position.
Overall Shipping Length - without Counterweight 258.8 in
Note (2) ***With blade positioned at the rear of the machine.
Height - Boom Working - With Tools** 104.7 in
Height - Boom Transport - No Tools* 95.7 in

CAT 308 CR Dimensions with Long Stick

Dig Depth 182.8 in
Boom Swing - Left 23.8 in
Maximum Dig Height 277.1 in
Maximum Blade Height 14.6 in
Track Belt/Shoe Width 17.7 in
Cab Height 100 in
Tail Swing with Counterweight 62.4 in
O/A Undercarriage Length 113.4 in
Maximum Dump Clearance 199.7 in
Boom Swing - Right 36.8 in
Maximum Blade Depth 16 in
Ground Clearance 13.8 in
Stick Length 92.8 in
Maximum Reach 300.7 in
Maximum Reach - Ground Level 293.7 in
Boom In Reach 126.6 in
Swing Bearing - Height 29.7 in
O/A Track Width 90.6 in
Tail Swing without Counterweight 57.1 in
Vertical Wall 134 in
Note *Boom Height when stick is pinned in transport position with no attachments.
Note (2) ***With blade positioned at the rear of the machine.
Note (1) **Boom Height when stick is pinned in working position with attachments. Standard Stick offers only one pin position.
Height - Boom Transport - No Tools* 89 in
Height - Boom Working - With Tools** 120.1 in
Overall Shipping Length - without Counterweight 6872 mm (270.6 in)***
Overall Shipping Length - with Counterweight 6872 mm (270.6 in)***

CAT 308 CR Air Conditioning System

Air Conditioning The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1 kg of refrigerant which has a CO2 equivalent of 1.430 metric tonnes.

CAT 308 CR Mini Excavator Review

The CAT 308 CR Mini Excavator stands out as a compact and versatile machine in the realm of construction equipment, offering a combination of power and agility. Here's a comprehensive review highlighting both the advantages and drawbacks of this mini excavator:

CAT 308 CR Pros:

  • Compact Design: The CAT 308 CR's compact size allows it to navigate efficiently in confined spaces and urban construction sites, providing versatility and accessibility.
  • Powerful Performance: Despite its smaller size, this mini excavator delivers impressive power, making it suitable for a range of excavation tasks.
  • Advanced Technology: Equipped with modern technology, the CAT 308 CR features enhancements like GPS-guided systems, automated controls, and telematics, contributing to improved efficiency and precision in operations.
  • Maneuverability: The machine's design prioritizes maneuverability, enabling operators to work effectively in tight spaces without compromising on performance.
  • Durability: Built by Caterpillar, a trusted name in the industry, the CAT 308 CR is known for its durability and robust construction, ensuring a longer lifespan.
  • Fuel Efficiency: With advanced engine technology, the CAT 308 CR minimizes fuel consumption, promoting cost-effectiveness and environmental sustainability.

CAT 308 CR Cons:

  • Higher Initial Cost: Caterpillar equipment tends to come with a premium price tag, making the initial investment for the CAT 308 CR higher compared to some competitors in the mini excavator market.
  • Limited Bucket Size: Due to its compact nature, the bucket size may be smaller than larger excavators, potentially affecting productivity on larger-scale projects.
  • Operator Learning Curve: While designed for ease of use, operators unfamiliar with Caterpillar equipment may require some time to adjust and maximize the machine's potential.
  • Maintenance Costs: As with any heavy machinery, maintenance costs can accumulate, particularly if genuine Caterpillar parts and services are utilized, which may be more expensive than alternatives.
In conclusion, the CAT 308 CR Mini Excavator offers a compelling package for those seeking a powerful and maneuverable machine for various construction applications.

CAT 308 CR Mini Excavator Review

While the initial investment and maintenance costs may be considerations, the CAT 308 CR's performance, advanced features, and durability position it as a noteworthy choice in the competitive mini excavator market.

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