CAT D7G is a classic medium-size crawler bulldozer from Caterpillar — widely recognized as one of the most reliable, durable, and long-lived dozers ever built. Originally produced from the late 1980s through the 2000s in multiple series (Series I / II / III), it remains in high demand worldwide for construction, road building, land clearing, quarry, mining, and forestry work.

Powered by the legendary CAT 3306 / 3306C DTTA inline-six diesel engine — 10.5 L displacement, turbocharged & aftercooled — delivering 200 hp (149–150 kW) @ 2,000 rpm and massive low-end torque. Paired with a CAT 3-speed planetary power-shift transmission (3F/3R) and heavy-duty steering clutch/brake system — simple, rugged, and easily serviceable anywhere.

Standard operating weight ~20,230–20,580 kg, with a Semi-U / Straight blade capacity of 4.2 m³. Excellent tractive power, balanced size, and maneuverability make it ideal for bulk pushing, grading, and site preparation. The elevated sprocket undercarriage protects key components from shock and dirt, extending service life and lowering long-term costs.

Famous for simple mechanical design, massive parts availability, and low running costs — the D7G is the benchmark for "bulletproof" reliability. Whether buying new-old stock or well-maintained used units, it retains value and keeps working for decades.

✅ Engine

• Model: CAT 3306 / 3306C DTTA

• Gross / Net Power: 200 hp (149–150 kW) @ 2,000 rpm

• Displacement: 10.5 L (641 cu in)

• Configuration: 6-cylinder, turbocharged, aftercooled, direct injection

• Fuel Tank: 415 L (Series II) / 435 L (early versions)

• Cooling System: 45.4 L | Engine Crankcase: 27 L

Performance & Capacities

• Operating Weight: 20,230 – 20,580 kg

• Blade Capacity: 4.2 m³ (Semi-U / Straight)

• Transmission: Planetary Power-Shift — 3 Forward / 3 Reverse

• Travel Speeds:

• F1: 3.9 km/h | F2: 6.4 km/h | F3: 9.9 km/h

• R1: 4.5 km/h | R2: 7.8 km/h | R3: 11.9–12.7 km/h

• Ground Pressure: ~71 kPa (10.3 psi) — varies by shoe width

• Track on Ground: 2,720 mm

• Track Gauge: 1,981 mm

• Shoe Width: 510 mm (standard)

Dimensions

• Length (w/o blade): ~4,200 mm

• Overall Width: 2,560 mm

• Height (ROPS): 3,294 mm

• Ground Clearance: 349–366 mm

Systems & Capacities

• Hydraulic System: 102 L

• Final Drives: 34 L each

• Transmission/Steering/Torque Conv: 70 L

• Undercarriage: 6 track rollers per side, elevated sprocket

Please note that specific parameters and features may vary depending on configuration, model, and region. It is recommended to visit hegeermachinery.com for the latest technical manuals and detailed product specifications.