Hydraulic excavators usually couple engine power to (commonly) three hydraulic pumps rather than to mechanical drivetrains. The two main pumps supply oil at high pressure (up to 5000 psi) for the arms, swing motor, track motors and accessories while the third is a lower pressure (~700 psi) pump for pilot control of the spool valves; this third circuit allows for reduced physical effort when operating the controls. Generally, the 3 pumps used in excavators consist of 2 variable displacement piston pumps and a gear pump. The arrangement of the pumps in the excavator unit changes with different manufacturers using different formats.
From the AutoConnect™ Drive Over mower deck to the optional heated cab, the 1 Series is the one. Add a loader, backhoe and blade and you have the perfect mini tractor. In every nut and bolt, you’ll get fine-tuned engineering. The kind you’ll find in only the best small farm tractors. The result is a great sub-compact utility tractor that can double as a riding lawn mower.
Save time and money by using a skid steer loader to shoulder the weight of time-consuming, labor-intensive tasks. Sellers on eBay offer a wide selection of these small and incredibly versatile laborsaving machines, including models from big-name brands such as John Deere, Caterpillar, and Case. With such a large choice of heavy equipment, in new, used, and refurbished condition, it is easy to find exactly what you need, whether it is for domestic or commercial use.
Can you dig it? Add an excavator to your repertoire and you have the hydraulic-powered muscle to tackle an incredible range of tasks. These powerful machines, manufactured by the likes of Caterpillar and Bobcat, make short work of trench-digging and forestry work, and by shopping the huge inventory on eBay you have the opportunity to pick a make and model that fits your requirements and budget.