卡特 D 7 G

CAT D7G Dozer – Specifications 1. General Information • Model: Caterpillar D7G Track-Type Tractor (Bulldozer) • Production Era: Late 1970s – early 1980s (legacy model) • Primary Use: Heavy earthmoving, construction, mining, land clearing 2. Engine • Model: Cat 3306 DITA (Direct Injection Turbocharged Aftercooled) • Type: Inline 6‑cylinder, 4‑stroke diesel • Displacement: 10.5 L (638 cu in) • Bore × Stroke: 121 mm × 152 mm (4.75 in × 6.00 in) • Compression Ratio: 16:1 • Net Power (Flywheel): 150 kW (202 hp) @ 2200 rpm • Max Power: 164 kW (220 hp) @ 2200 rpm • Aspiration: Turbocharged + Aftercooled • Fuel System: Mechanical direct injection • Cooling: Water‑cooled 3. Powertrain • Transmission: 3‑forward / 1‑reverse power‑shift (torque converter) • Final Drive: Planetary reduction • Steering: Clutch‑and‑brake steering • Drive: Direct drive to tracks 4. Dimensions & Weights • Operating Weight: 20,580 kg (45,381 lb) • Ground Contact Length: 2,720 mm (107 in) • Track Shoe Width (Standard): 560 mm (22 in) • Ground Pressure (Standard): ~75 kPa (10.9 psi) • Overall Length (with SU blade): ~6,800 mm • Overall Width (with SU blade): ~3,300 mm • Height (to ROPS): ~3,600 mm 5. Blade & Attachments • Standard Blade: Semi‑Universal (SU) blade • Blade Capacity: 7.53 m³ (9.85 cu yd) • Blade Width: 3,660 mm (144 in) • Blade Height: 1,220 mm (48 in) • Other Blades: Straight (S), Angle (A), U‑blade (optional) • Common Attachments: Ripper (single / multi‑shank), Winch 6. Capacities • Fuel Tank: 380 L (100 US gal) • Engine Oil: 28 L (7.4 US gal) • Cooling System: 45.4 L (12 US gal) • Transmission Oil: 70 L (18.5 US gal) • Hydraulic System: 120 L (31.7 US gal) 7. Performance • Forward Speed Range: 0–11.2 km/h (0–7.0 mph) • Reverse Speed Range: 0–13.7 km/h (0–8.5 mph) • Drawbar Pull (Max): ~220 kN (49,500 lbf) • Gradeability: ~35% (19°) 8. Undercarriage • Track Type: Sealed and lubricated (SALT) • Rollers: 7 per side (bottom) • Idlers: Front idler, rear drive sprocket • Sprocket: Elevated design (protects final drives) 9. Features • ROPS/FOPS: Standard rollover and falling object protection • Operator Station: Enclosed cab with heating (optional A/C) • Hydraulics: Load‑sensing implement hydraulics • Serviceability: Ground‑level service points, easy access to filters