Used Komatsu PC78US-8 7.8 Ton Compact Excavator 54.0 kW Diesel Engine 0.28 m³ Bucket Crawler Excavator Second Hand

Used Komatsu PC78US-8 7.8 Ton Compact Excavator – Reliable Japan Excavation Equipment

We are offering this Used Komatsu PC78US-8 7.8 Ton Compact Excavator in excellent working condition with verified service history and comprehensive pre-delivery inspection completed. The Komatsu PC78US-8 is a popular compact excavator model in the global second-hand construction equipment market, well-regarded for its robust build quality, fuel-efficient engine, and smooth hydraulic performance. Each unit has undergone full diagnostic testing including engine compression analysis, hydraulic pressure verification, undercarriage wear measurement, and complete operational verification to ensure immediate job site readiness.

Engine and Powertrain

This Komatsu PC78US-8 is powered by a turbocharged diesel engine delivering 54.0 kW rated output for demanding earthmoving applications. The engine features advanced fuel injection with electronic control for precise fuel delivery and optimized combustion. A high-capacity cooling system with thermostatically controlled fan maintains stable temperatures during continuous operation. Two-stage dry-type air filtration protects the engine in dusty construction environments.

The powertrain features a variable displacement hydraulic pump system with load-sensing control that delivers hydraulic flow precisely matched to work demand, enabling smooth simultaneous operations with reduced fuel consumption.

Hydraulic System and Digging Performance

The advanced hydraulic system provides responsive and precise control for all working functions. Boom, arm, and bucket cylinders feature high-strength chrome-plated rods with heavy-duty seal designs. The hydraulic oil cooler is sized for continuous high-temperature operation, maintaining system stability throughout the working day. All hydraulic hoses and fittings have been inspected and replaced where necessary to ensure leak-free operation.

Undercarriage and Structure

The heavy-duty undercarriage features a reinforced X-frame design with stress-relieved track frames for maximum structural durability. All track components including links, pins, bushings, sprockets, idlers, and rollers have been thoroughly measured for wear and are within acceptable service limits. Track shoes in standard grouser configuration suit general earthmoving applications. The swing bearing features induction-hardened raceways for extended operational life with smooth upper structure rotation.

Specifications Table

Inspection Protocol and Quality Control

Each Komatsu PC78US-8 has completed our rigorous multi-point inspection program. Engine evaluation includes cold start test, compression measurement, and oil pressure check. Hydraulic system testing covers main pump flow measurement under load, cylinder drift evaluation, and full working cycle verification. Undercarriage assessment measures track link and bushing wear, sprocket tooth condition, roller and idler bearing play, and track tension. Full electrical system verification checks all instruments, warning indicators, lighting, and monitoring functions. A detailed inspection report is provided with each unit.

After-Sales Support and Parts

We maintain comprehensive spare parts inventory for Komatsu excavators including engine service kits, hydraulic pumps and cylinder seal kits, undercarriage components, electrical parts, and bucket assemblies. Our technical support team provides remote diagnostics assistance and can coordinate on-site service through our international partner network. Express parts shipping via air freight is available for urgent requirements. Digital copies of operator manuals, service manuals, and parts catalogs are provided to support your maintenance team.

Applications

The Komatsu PC78US-8 7.8 ton compact excavator is ideal for general site preparation and earthmoving, building foundation excavation, road construction and highway maintenance, utility trenching for water and sewer lines, landscaping and land clearing, demolition and material recycling, quarry and aggregate operations, agricultural drainage projects, and municipal infrastructure development.

Contact us today for detailed photographs, inspection reports, hour meter readings, and shipping quotations to your nearest port with full customs documentation support for international buyers.