卡特 312 D

### CAT 312D (Hydraulic Excavator) – Specifications #### 1. Engine - **Model**: Cat C4.2 ACERT™ - **Net Power (SAE J1349)**: **67 kW / 90 hp @ 2200 rpm** - **Gross Power**: **72 kW / 97 hp** - **Displacement**: **4.25 L (259 in³)** - **Bore × Stroke**: **102 mm × 130 mm** - **Emission**: Tier 3 / Euro 3 #### 2. Operating Weight - **Standard Undercarriage**: **12,920 kg (28,480 lb)** - **Long Undercarriage (312D L)**: **13,450 kg (29,650 lb)** #### 3. Hydraulic System - **Main Pump Flow (2×)**: **127 L/min (33.5 gpm)** - **Max Pressure – Implements**: **305 bar (4,424 psi)** - **Max Pressure – Travel**: **350 bar (5,076 psi)** - **Max Pressure – Swing**: **230 bar (3,336 psi)** - **Pilot System Flow**: **22 L/min (5.8 gpm)** #### 4. Digging Performance - **Max Digging Depth**: **5,550 mm (218 in)** - **Max Reach (Ground Level)**: **8,200 mm (323 in)** - **Max Loading Height**: **6,100 mm (240 in)** - **Bucket Capacity (Standard)**: **0.52 m³** #### 5. Undercarriage & Dimensions - **Track Width**: **500 mm** - **Overall Width**: **2,490 mm** - **Overall Height (Cab Top)**: **2,760 mm** - **Track Length on Ground**: **2,780 mm** - **Counterweight Clearance**: **915 mm** #### 6. Swing & Travel - **Swing Speed**: **12.4 rpm** - **Swing Torque**: **30.95 kN·m** - **Max Travel Speed**: **5.5 km/h** - **Gradeability**: **35°** #### 7. Counterweight - **Standard Counterweight**: **2,700 kg**