Doosan DX63, DX85R Excavators Feature Industry-Leading Performance

April 2014, Vol. 69 No. 4
Doosan's DX63-3 Excavator

The new Tier 4-compliant Doosan DX63-3 and DX85R-3 excavators have been upgraded with a number of conveniences that provide operators with higher-precision controls, greater force and overall enhanced productivity.

Comprehensive improvements to both the 6.3-metric-ton DX63-3 compact conventional tail swing excavator and the 8.5-metric-ton Doosan DX85R-3 reduced tail swing excavator include a blade float, multi-function joysticks, color instrumentation panel, Auto-Shift drive system and standard rubber tracks.

Offering more muscle than its predecessor, the DX63-3’s horsepower has increased 13.5 percent to 59.4 to match the DX85R-3. Their Tier 4-compliant diesel engine features a high-pressure common-rail fuel injection system, diesel oxidation catalyst (DOC) and a diesel particulate filter (DPF). The DX63-3 has an operating weight of 13,779 pounds, while the DX85R-3 has an operating weight of 18,960 pounds and an overall width of 91 inches.

Performance-driven lifting and digging

Compared to the previous DX60R, the DX63-3’s upper-structure is shifted rearward on the undercarriage to increase efficiency. The DX63-3’s 11.6 inches of tail swing overhang provides best-in-class over-the-side lifting performance, without increasing the machine’s overall weight. This additional tail swing also improves the DX63-3’s slew performance when working on side slopes. It is engineered to dig to depths of 13 feet 6 inches. The DX63-3’s hydraulic system delivers exceptional loaded cycle times. It offers 5,767 foot-pounds of arm force, while bucket force has increased to 9,731 foot-pounds.

In contrast, the DX85R-3’s minimal 5.8 inches of tail overhang allows it to work in congested environments and tight spaces next to buildings or other obstructions and dig to depths of 15 feet 6 inches. The DX85R-3’s bucket force has increased for improved productivity when excavating or trenching with an impressive 14,509 foot-pounds of breakout force — an 18 percent increase over its predecessor for class-leading productivity — and it also offers 8,069 foot-pounds of arm force.

Improved grading and leveling