卡特 308 C

### CAT 308C CR (Compact Radius) – English Specifications #### 1. Basic Data - **Model**: CAT 308C CR - **Type**: Compact Radius Crawler Excavator - **Operating Weight**: **7,390–8,260 kg** (depending on config) - **Standard Bucket Capacity**: **0.28 m³ (ISO heaped)** - **Track Shoe Width**: **450 mm (18")** (triple grouser) #### 2. Engine - **Manufacturer**: Mitsubishi - **Model**: **4M40-E1** (4-cyl, turbo, water-cooled diesel) - **Rated Net Power**: **40.5 kW / 55 hp @ 2,200 rpm** - **Displacement**: **2.84 L** - **Emission Standard**: **Tier 2 / Stage II** - **Fuel Tank Capacity**: **60 L** #### 3. Performance - **Max Travel Speed (High/Low)**: **4.8 / 3.2 km/h** - **Swing Speed**: **11.5 rpm** - **Bucket Breakout Force**: **58 kN** - **Arm Breakout Force**: **43 kN** - **Gradeability**: **70% (35°)** - **Ground Pressure**: **38–42 kPa** (varies with weight) #### 4. Working Range (Std 3.7m boom + 2.21m stick) - **Max Digging Depth**: **4,020 mm** - **Max Reach (Ground Level)**: **6,170 mm** - **Max Cutting Height**: **7,790 mm** - **Max Loading Height**: **5,610 mm** - **Tail Swing Radius**: **1,290 mm** (compact radius) #### 5. Transport Dimensions (mm) - **Length**: **5,850** (with bucket) - **Width**: **2,200** (standard tracks) - **Height**: **2,590** (cab top) - **Track Gauge**: **1,700 mm** #### 6. Hydraulic System - **Main Pumps**: 2 × variable displacement piston pumps - **Max Flow**: **2 × 32 L/min = 64 L/min** - **Relief Pressure**: **27.5 MPa (275 bar)** - **Hydraulic Oil Tank**: **95 L**