Caterpillar 308E Midi Excavator

Powerful Performance in a Compact 8.4-Ton Package

The Caterpillar 308E delivers full-size excavator power in a midi-sized frame that fits where larger machines simply cannot. Weighing in at 8.4 tons and producing a net power of 66.6 hp from its Cat C3.3B engine meeting Tier 4 Final standards, this machine bridges the gap between small mini excavators and bulky midsize equipment. Whether your business involves residential construction, utility trenching, foundation excavation, or landscaping, the 308E brings the versatility, efficiency, and reliability that contractors demand on every job.

Why You'll Love the 308E

• Outstanding Fuel Efficiency – Fuel consumption ranges from 5 to 9 liters per hour depending on workload, and the machine features an auto engine shutdown to save fuel during idle periods. Economy Mode can reduce operating costs by up to 20%, keeping your daily expenses predictable.

• Compact Radius Access – The compact radius design allows operation in confined areas where standard tail swing machines cannot work safely. The upper body radius stays within 11 inches of the undercarriage, dramatically reducing the risk of damage to the machine and surrounding structures.

• High Definition Hydraulic System – The Caterpillar 308E is equipped with high definition hydraulics for precision control. Load sensing technology paired with variable-displacement piston pump delivery and flow sharing ensures smooth, simultaneous boom, arm, and swing operation without lag or pressure spikes.

• Built to Last – Produced across the 2013–2021 production span, the 308E features reinforced boom and stick construction, a robust undercarriage, and components often sized for heavier machines. Caterpillar equipment generally holds high resale value due to brand reliability, making this a smart long-term investment.

• Operator Comfort That Reduces Fatigue – The 308E CR has a spacious operator station for comfort, featuring a sealed and pressurized cab with air conditioning and heat. The 308E includes features that reduce operator fatigue for longer workdays, including an ergonomic joystick control system for user-friendly operation and a rearview camera for enhanced visibility.

What Makes the 308E Different

Most midi excavators force you to choose between digging power and maneuverability. You either get a compact frame that lacks force or a powerful machine that cannot navigate tight jobsites.

The Caterpillar 308E is built differently:

• Swing Boom Front Linkage – The swing boom design allows the boom to move laterally toward or away from the tracks, enabling precise digging beside walls, fences, and utility lines without repositioning the entire machine. Many competitors in the midi class simply do not offer this capability, limiting their versatility onsite.

• COMPASS Monitoring and Security System – The COMPASS monitor system features a user-friendly interface with security options, including anti-theft password locking, maintenance tracking, and real-time performance metrics for fuel use and operating hours. This level of operation oversight keeps your equipment secure and your maintenance on schedule, reducing downtime.

• Automatic Idle and Fuel-Saving Intelligence – The system automatically drops engine RPM after just four seconds of inactivity, cutting fuel burn and noise. Combined with Economy Mode, this push toward efficiency translates directly into lower cost per hour of operation and extended engine life.

• Global Caterpillar Support – Cat's worldwide dealer network ensures parts availability, warranty protection, and access to Cat Reman components that maintain spec without full replacement cost.

How the 308E Works for Your Projects

1. Transport and Positioning With dimensions of 6.38 m in length and 2.32 m in width, the 308E fits on standard trailers and passes through limited gate openings. A maximum travel speed of 3.26 mph lets you reposition efficiently across the jobsite. Ground pressure sits at just 5.3 psi, protecting sensitive surfaces and allowing work on softer ground.

2. Versatile Operation The 308E can utilize various hydraulic attachments for increased versatility. The 308E is compatible with quick couplers for tool attachment, enabling fast switching between standard buckets, grading buckets, hydraulic thumb configurations, breakers, and augers through the auxiliary hydraulics circuit. Hydraulic pressures in the equipment circuits reach approximately 280 bar, delivering serious breakout force of about 60.2 kN at the bucket.

3. Precision Results The excavator has a maximum digging depth of 4.15 meters and a horizontal reach of approximately 6.82 m with the standard stick. A 0.23 m³ bucket capacity with 0.60 m width provides efficient material movement, while the swing speed of 10 rpm keeps cycle times competitive for trenching, grading, and material handling tasks.

Technical Specifications

The Caterpillar 308E is designed for easy maintenance with ground-level access points. Daily maintenance points on the 308E are easily accessible, keeping service intervals quick and minimizing downtime between productive hours. Regular 2,000-hour maintenance cycles cover hydraulic fluid and filter changes, final drive oil, and swing component inspection.

Who the 308E Is Perfect For

• Construction Contractors – Working on residential foundations, site prep, and light commercial projects where a full-size excavator is overkill but a smaller mini excavator lacks the dig depth and lift capacity you need.

• Landscaping Professionals – The high performance hydraulic system delivers precise grading and slope work. Long stick options extend reach for finish grading, while the compact footprint protects turf and hardscape.

• Utility Companies – It is optimal for tasks like utility trenching, foundation excavation, and landscaping. The swing boom front linkage enables digging parallel to existing infrastructure without constant repositioning, boosting productivity in tight corridors.

• Rental Companies – The 308E is commonly used for road repairs and light demolition projects, making it a versatile fleet asset. The machine's durability, low maintenance cost per hour, and strong brand recognition keep utilization rates high and customers satisfied.

Frequently Asked Questions

What is the average market price for a used 308E? The average price for Caterpillar 308E CR is $45,247 on the used market, though pricing varies significantly based on hours, undercarriage condition, attachment packages, and regional demand. The Caterpillar 308E CR is priced at $95,000 plus GST in New Zealand, while a Caterpillar 308E2 CR is negotiable at JPY 3,300,000 in Japan. Financing options are available for Caterpillar 308E CR purchases.

How does fuel consumption compare to competitors? The 308E averages approximately 7.2 liters per hour, with a working range of 5–9 L/hr. Economy Mode and automatic idle features push real-world consumption toward the lower end during mixed-duty cycles. The auto engine shutdown prevents unnecessary fuel burn during extended pauses.

What attachments are compatible? The 308E supports a wide range of tools through its auxiliary hydraulics, including hydraulic thumb, various bucket widths, breakers, augers, and grading attachments. Quick couplers allow fast changeover without leaving the cab, keeping you productive when switching between tasks.

Is parts availability still good for this model? Yes. Caterpillar's global dealer network maintains parts inventory for the 308E series. Cat Reman components offer cost-effective alternatives for major system fluid capacity components, hydraulic pump rebuilds, and engine overhauls without sacrificing original specifications.

What should I inspect when buying used? Focus your inspection on undercarriage wear (track pads, rollers, idlers, and sprocket teeth), hydraulic system condition (check for leaks at cylinder seals and hose fittings), cab integrity, boom and stick pin play, and bucket teeth wear. The 308E's conventional tail swing design requires more rear clearance, so check the counterweight and rear frame for impact damage. Verify emissions system components are intact and functioning on Tier 4 Final models.

Ready to Add the 308E to Your Fleet?

Stop compromising between the power you need and the compact footprint your jobsites demand. The Caterpillar 308E midi excavator delivers 66.6 hp of digging force, a 4.15-meter dig depth, and swing boom versatility in an 8.4-ton package that fits where it matters most.

The 308E2 CR weighs 8.4 tons and offers high stability, making it a machine you can count on for utility work, landscaping, demolition, and everything in between. The 308E's compact size allows for easier transport and access to tight spaces, while the Caterpillar name ensures the resale value and dealer support that protect your investment.

Contact your local Cat dealer to find available units, schedule an inspection, and explore financing options that fit your business.

The 2012 Caterpillar 308E Midi Excavator is an 8-ton class machine featuring an operating weight of 18,371 lbs (8,333 kg) and a 65 hp (net) Cat C3.3B engine. It utilizes a Compact Radius (CR) or Swing Boom (SB) configuration to maximize stability while working in confined commercial and residential job sites.

Official data verified through the Caterpillar Specalog and RitchieSpecs Engine Performance Charts breaks down the core machine layout below.

Core Performance Specifications

Hydraulic & Undercarriage Layout

• Pump Flow Allocation: Employs a load-sensing variable displacement piston pump pushing 39.6 gal/min (150 L/min).

• System Operating Pressure: Set to 4,061 psi (28.0 MPa) for standard implements and tools.

• Auxiliary Primary Flow: Features 33.8 gal/min (128 L/min) high-pressure flow for specialized attachments like thumbs or hammers.

• Travel Drive Configuration: Reaches low speeds of 2.06 mph (3.32 km/h) and high-range travel of 3.26 mph (5.26 km/h).

• Ground Footprint Pressure: Distributes machine mass smoothly down to 5.3 psi (30.5 kPa) using standard 450 mm shoes.

Standard Cockpit & Technology Features

• COMPASS Control System: Includes a built-in control panel governing anti-theft security codes, automated fuel-saving Economy Mode, and adjustable flow rates.

• Operator Environment Comfort: Sealed cab architecture providing integrated air conditioning, mechanical suspension seating, pilot control joysticks, and an openable roof skylight.

• Ground-Level Service Points: Designed with an ultra-wide lifting side hood providing tool-free entry to the engine oil filter, fuel filters, and main air cleaner elements.