卡特 D 7 G

### CAT D7G Series 2 – Crawler Dozer (Official English Specs) #### 1. General - **Model**: CAT D7G Series 2 - **Type**: Track‑type tractor / crawler dozer - **Operating weight**: **20,580 kg (45,381 lb)** - **Shipping weight**: **15,650 kg (34,510 lb)** - **Blade capacity**: **4.2 m³ (5.5 yd³)** (A‑blade, standard) - **Manufacture country**: USA #### 2. Engine (CAT 3306C DTTA / 3306 DITA) - **Model**: CAT 3306C DTTA (6‑cylinder, turbocharged, aftercooled) - **Net power (ISO 9249/SAE J1349)**: **150 kW (202 hp) @ 2,000 rpm** - **Max flywheel power**: **164 kW (220 hp) @ 2,000 rpm** - **Displacement**: **10.5 L (640.8 cu in)** - **Bore × Stroke**: **121 mm × 152 mm (4.75 in × 6 in)** - **Emission**: **Tier 2 / Euro 2** - **Fuel tank capacity**: **415 L (110 gal)** #### 3. Dimensions (L×W×H) - **Length (basic tractor, with drawbar)**: **4,200 mm (13.78 ft)** - **Length with blade**: **5,280 mm** - **Width (without blade)**: **2,560 mm (100.79 in)** - **Height (to ROPS/cab top)**: **3,294 mm (10.81 ft)** - **Track gauge**: **1,981 mm (77.99 in)** - **Track shoe width (std)**: **510 mm (20 in)** - **Ground clearance**: **349 mm (13.74 in)** - **Track on ground length**: **2,720 mm (107.09 in)** #### 4. Performance - **Travel speed (forward)**: 1st **3.9 km/h**; 2nd **6.4 km/h**; 3rd **9.9 km/h** - **Travel speed (reverse)**: up to **12.0 km/h (7.5 mph)** - **Ground pressure (std shoe)**: **≈0.8 kg/cm² (11.4 psi)** - **Gradeability**: **70% (35°)** #### 5. Undercarriage & Hydraulics - **Track type**: Sealed & lubricated track (SALT) - **Track rollers per side**: **6** - **Hydraulic tank capacity**: **102 L** - **System pressure**: **24.5 MPa**