Euromach’s Spider R105 excavator uses multiple axes of hydraulic power to extend its reach up, down, and sideways and also to travel over extremely uneven terrain.
Powered by a John Deere 4-cylinder, 140-hp engine, the R105 features a hydrostatic drive for propulsion, hydraulic steering, and multi-axis boom for digging, loading, or just about any other task. What makes the R105 stand out, though, is that its wheels are mounted to the ends of beams that can be deployed in multiple directions. This means the machine can work on uneven terrain — even steep slopes —without having to extend stabilizers.
However, the R105 does have stabilizers, which can be used to extend its reach, as shown in the inset photo. Furthermore, its main boom offers the articulated motion of an excavator and a telescoping action to give it the added reach of a telehandler.
Cool and efficient
Other hydraulic functions are not so obvious. High efficiency of the R105’s hydraulic system is accomplished with an electronically controlled load-sensing system. This system monitors operation of hydraulic components and closely matches pump output to work requirements. Reducing the power required of the hydraulic pumps saves fuel.
An additional boost to efficiency is provided by the machine’s hydraulic fan drive. The fan drive uses pressurized hydraulic fluid to drive a fixeddisplacement motor. The fan is a centrifugal load, so fan speed is a function of motor torque. Therefore, speed can be regulated by controlling pressure across the motor.