For truck-mounted hydraulic systems, the most common design in use is the gear pump. This design is usually characterized as having fewer shifting parts, being simple to provider, more tolerant of contamination than other designs and relatively inexpensive. Gear pumps are set displacement, also known as positive displacement, pumps. This implies the same volume of circulation is produced with each rotation of the pump’s shaft. Gear pumps are rated when it comes to the pump’s optimum pressure rating, cubic ” displacement and maximum insight speed limitation.

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