8Ton Crawler Excavator

Product Definition

Designed to excel in space-sensitive and multi-phase projects, this 8-ton class crawler excavator delivers a optimal blend of power, precision, and economy. Its balanced weight and dimensional profile provide excellent stability and mobility for urban redevelopment, pipeline installation, park construction, and roadway repair, while its efficient hydraulic system ensures strong digging force and lower fuel consumption. The model's adaptability to various attachments further extends its utility across different tasks, from grading and trenching to light material handling. Offering both operational flexibility and dependable performance, it stands as a smart investment for contractors seeking a capable, all-round earthmoving solution.

Technical Parameters and Specifications

• Operating Weight: 7,800–8,500 kg

• Engine Power: 45–55 kW (ISO 14396)

• Bucket Capacity: 0.25–0.35 m³

• Maximum Digging Depth: 4,000–4,300 mm

• Maximum Digging Reach: 6,200–6,500 mm

• Travel Speed: 2.8–4.8 km/h (dual speed)

• Hydraulic System Flow: 150–180 L/min

• Hydraulic Pressure: 28–32 MPa

• Swing Speed: 9–11 rpm

• Undercarriage Width: 2,000–2,200 mm

• Gradeability: 30°

• Fuel Tank Capacity: 130–150 L

Structure and Material Composition

• Main Components:

• Upper Frame: Welded high-strength steel structure

• Boom & Arm: Q345B/Q550 special structural steel

• Crawler Undercarriage: Reinforced track frame + forged rollers

• Hydraulic System: Variable displacement pumps + pilot control valves

• Engine Compartment: Tier 3/Tier 4 compliant diesel engine

• Cabin: ROPS/FOPS-certified operator cabin

• Material Highlights:

• High-tensile plates for boom fatigue resistance

• Wear-resistant bushings and pin shafts

• Forged sprockets and heat-treated track links

Manufacturing Process

1. Structural Fabrication

1. Steel Plate Cutting → CNC laser cutting for precision control

2. Boom/Arm Forming → Hydraulic press forming and robotic welding

3. Main Frame Assembly → Multi-point jig alignment + CO₂ shielding weld

2. Machining & Treatment

1. Boring of hinge points → CNC machining center

2. Heat treatment → Hardening of pins, bushings, and wear parts

3. Hydraulic & Powertrain Assembly

1. Hydraulic pump and valve integration

2. Engine mounting and vibration isolation tuning

3. Hose routing with abrasion protection sleeves

4. Painting & Surface Treatment

1. Shot blasting → Removes oxide layers

2. Primer coating → Corrosion protection

3. Top coating → Industrial-grade polyurethane

5. Final Assembly and Testing

1. Electrical system installation

2. Cabin assembly and safety testing

3. Hydraulic leakage test under 30–32 MPa

4. Functional operation simulation (digging, swing, travel)

Industry Comparison

Application Scenarios

• Dealers: Suitable for urban construction fleets, rental business, and mixed-province distribution models.

• EPC Contractors: Municipal engineering, pipeline trenching, cable laying, drainage works.

• Construction Firms: Foundation preparation, landscaping, demolition, rural development.

• Agriculture & Forestry: Land clearing, pond construction, irrigation system building.

• Mining & Quarrying: Small-scale loading and stripping work.

Core Pain Points and Solutions

• 1. Fuel Inefficiency → Variable-displacement pumps optimize flow demand and reduce consumption.

• 2. Hydraulic Overheating → Enlarged oil coolers improve thermal balance under heavy cycles.

• 3. Limited Operating Space → Compact tail design enhances maneuverability.

• 4. Component Wear → Heat-treated pins and reinforced track systems extend service intervals.

Risk Warnings and Mitigation

• Improper hydraulic oil replacement can cause pump cavitation.

• Working on slopes >30° increases rollover risk.

• Low-quality aftermarket filters reduce engine lifespan.

• Incorrect track tensioning accelerates undercarriage wear.

Procurement Selection Guide

1. Confirm job type: trenching, loading, demolition, or municipal tasks.

2. Check engine compliance: Tier 3/Tier 4 based on region.

3. Evaluate hydraulic pump brand (e.g., Kawasaki, Bosch Rexroth).

4. Compare real digging force, not just brochure values.

5. Inspect boom/arm welding quality and NDT reports.

6. Review fuel efficiency under standardized test cycles.

7. Verify parts availability, service network, and warranty terms.

Engineering Case Study

A 8-ton crawler excavator was deployed in a municipal utilities project in Eastern Europe for trenching 1.2 km water pipeline. With a 0.3 m³ bucket and high-flow hydraulic circuit, the machine reduced excavation time by 18% and maintained fuel consumption under 8 L/hour. The compact tail ensured safe operation in narrow streets, while reinforced undercarriage components extended service life in mixed soil conditions.

FAQ

Is an eight ton excavator appropriate for city projects? Yes, it balances energy and maneuverability.

Can it manage small demolition tasks? Yes, with hydraulic breaker attachment.

What is the regular gas consumption? 6–9 L/hour relying on load.

Does it help a couple of attachments? Buckets, breakers, augers, grapples, rippers.

Can it function in tender soil? Wide-track picks furnish stability.

Is the cabin protected? Most fashions provide ROPS/FOPS certification.

How frequently need to hydraulic oil be changed? Typically each and every 1,000–2,000 hours.

What transport gear is needed? Standard flatbed trailers.

Does it aid lengthy working hours? Yes, with cooling structures designed for warmness load.

What assurance is typical? 12–24 months relying on vicinity and components.

Request Quotation / Technical Documents / Samples

For complete technical data sheets, component configuration options, or project-based quotations, please contact our engineering sales team. Support includes OEM specs, performance reports, and on-site application guidance for contractors and distributors.

E-E-A-T Author Credentials

This technical document is written by an equipment engineering specialist with 15+ years of experience in hydraulic excavator design, component integration, and performance validation for international construction machinery markets.