Second Hand Komatsu PC78 Compact Excavator Stable Performance Construction Use

I. Basic Specifications

Parameters Typical Values
Model Name: Komatsu PC78 / PC78US-8 / PC78US-11 Hydraulic Excavator
Operating Weight: ~ 7,800 – 8,270 kg (approx. 7.8–8.3 t) (PC78US-8/PC78)
Engine Model: Komatsu SAA4D95LE Series 4-Cylinder Turbocharged Diesel Engine
Rated Power: ~41–55 kW (≈55–74 hp) @ ~1950–2000 rpm (depending on specific version/emission standard)
Fuel Tank Capacity: ~ 125 L (actual approx. 110 – 130 L)
Standard Bucket Capacity: ~ 0.28 – 0.34 m³ (larger buckets available)

⛏️ II. Engine and Power

Item Parameters
Engine Type: 4-stroke, water-cooled, turbocharged diesel engine
Estimated Displacement: ~3.0–3.3 L (Based on similar models)
Net Power ~ 40–45 kW (approx. 55–60 hp)
Travel Speed ​​High ~ 5.0 km/h / Low ~ 2.8–3.0 km/h
Swing Speed ​​~ 9–10 rpm

⛏️ III. Operational Performance
Operating Specifications Values ​​(approx.)
Maximum Digging Depth ~ 4,100–4,230 mm
Maximum Digging Height ~ 6,200–6,500 mm
Maximum Unloading Height ~ 5,180–5,260 mm
Maximum Horizontal Digging Radius ~ 6,300–6,950 mm
Bug Digging Force ~ 60–61 kN (≈ 6,100 kgf) (ISO Digging Force)
Hoist Digging Force ~ 41–42 kN (≈ 4,100 kgf)

📏 IV. Dimensions & Chassis
Dimension Item Typical Values ​​(approx.)
Overall Transport Length ~ 6,200–6,500 mm
Overall width ~ 2,200–2,400 mm
Overall height ~ 2,700–2,800 mm
Tail turning radius ~ 1,450–1,800 mm
Track width typically ~ 450–500 mm (depending on configuration)
Minimum ground clearance ~ 335–400 mm (different versions)

🛠️ V. Hydraulics & System
System Configuration Description
Hydraulic Type: Variable displacement main pump + load sensing system (high flow rate)
Hydraulic Flow Rate ~ ≈160 L/min (overall system)
Hydraulic Pressure: Main circuit approx. 24.5–34.3 MPa