日立建机 ZX 50 U

### HITACHI ZX50U-5 / -5N / -5B Specifications #### 1. General - **Model**: ZX50U-5 / -5N / -5B (Mini Crawler Excavator, Zero Tail Swing) - **Operating Weight**: **4,780–5,330 kg** (canopy/cabin, rubber/steel track) - **Engine Model**: Yanmar **4TNV88C** (4-cylinder, water-cooled, direct injection) - **Rated Power**: **27.1 kW / 36.9 HP @ 2,400 rpm** - **Emission Standard**: **Tier 4 Final / Stage V** #### 2. Bucket & Digging Performance - **Standard Bucket Capacity**: **0.16 m³ (SAE)** - **Max Digging Depth**: **3,830 mm** - **Max Ground Reach**: **6,130 mm** - **Bucket Breakout Force**: **36.8 kN** - **Stick/Arm Length**: **1,690 mm (standard)**, optional **1,380 mm** #### 3. Dimensions (Std. Rubber Track, Canopy) - **Transport Length**: **5,180 mm** - **Transport Width**: **1,960 mm** - **Transport Height**: **2,550 mm** - **Track Shoe Width**: **400 mm** (rubber/steel) - **Tail Swing Radius**: **850 mm** (zero-tail) #### 4. Hydraulic System - **Main Pumps**: 1 × variable displacement piston pump - **Max Flow**: **115 L/min** - **Auxiliary Flow**: **60 L/min** (optional) - **Relief Pressure**: **24.5 MPa** - **Swing Speed**: **9.0 rpm** #### 5. Undercarriage & Travel - **Travel Speed (Low/High)**: **2.5 / 4.2 km/h** - **Gradeability**: 30° (58%) - **Ground Pressure**: 32.0 kPa (rubber track) #### 6. Capacities - **Fuel Tank**: **60 L** - **Hydraulic Oil Tank**: **40 L** - **Engine Oil**: **8.0 L**