used digger

The PC70-8 is engineered for versatility in confined spaces. With an overall width of approximately 2,225 mm, it can easily navigate through narrow gates or work on busy urban roads without blocking traffic. Despite its compact footprint, it maintains a generous digging depth of about 4,100 mm. For used buyers, this balance of size and power means you can bid on a wider variety of projects—from residential landscaping and utility pipe laying to indoor demolition—where larger 20-ton machines simply cannot fit.

The PC70-8 is powered by the Komatsu S4D95LE-3 engine, a robust 4-cylinder unit delivering 48.5 kW (65 hp). This engine is famous in the industry for its “high torque at low speeds” design, which reduces internal stress and extends the engine’s service life. Unlike many modern small excavators that rely on complex electronic sensors, the PC70-8’s mechanical fuel injection system is highly tolerant of varying diesel qualities, making it exceptionally reliable in developing regions. Owners often report these engines reaching 15,000+ hours with only standard maintenance.

In the 7-ton class, fuel is the largest variable cost. The PC70-8 features an advanced Electronic Control System that coordinates the engine and hydraulic pumps to optimize power output. In standard “Eco Mode,” a well-maintained used PC70-8 consumes only about 5.5 to 7.5 liters of fuel per hour. Compared to older models or less-refined brands, this can save you over $2,000 annually in fuel costs alone. This efficiency, combined with its lower purchase price in the used market, ensures a much faster Return on Investment (ROI) for small contractors.

Absolutely. The PC70-8 utilizes Komatsu’s CLSS (Closed-center Load Sensing System), which ensures that hydraulic flow is distributed precisely based on the operator’s joystick movement. This means you get full breakout force (approx. 54.8 kN at the bucket) even when idling. For used buyers, we recommend checking the auxiliary hydraulic lines; if equipped, the PC70-8 can power high-frequency breakers for road repair or augers for fencing without overheating, thanks to its high-capacity hydraulic oil cooler.

The “Komatsu” name on the side of the machine is a global currency.

• Parts Availability: You can find PC70-8 filters, pins, and track links in almost any city worldwide.

• Resale Stability: While budget brands may lose 50% of their value in 2 years, a used Komatsu PC70-8 follows a much flatter depreciation curve. Even after you use it for another 3 years, you can often sell it for 70-80% of what you paid, effectively making your “cost of ownership” extremely low.

• Structural Integrity: Komatsu uses high-tensile steel casting in the boom foot and swing circle, areas where cheaper brands often develop cracks after 5,000 hours of work.