For truck-mounted hydraulic systems, the most typical design in use is the gear pump. This design is certainly characterized as having fewer shifting parts, being easy to provider, more tolerant of contamination than various other designs and relatively inexpensive. Gear pumps are fixed displacement, also known as positive displacement, pumps. This implies the same level of movement is produced with each rotation of the pump’s shaft. Gear pumps are rated with regards to the pump’s optimum pressure rating, cubic inch displacement and maximum insight speed limitation.

Generally, gear pumps are used in open center hydraulic systems. Gear pumps trap essential oil in the areas between your teeth of the pump’s two gears and your body of the pump, transportation it around the circumference of the apparatus cavity and then force it through the outlet slot as the gears mesh. Behind the brass alloy thrust plates, or wear plates, a small amount of pressurized oil pushes the plates tightly against the gear ends to boost pump efficiency.