For truck-mounted hydraulic systems, the most common design in use may be the equipment pump. This design is certainly characterized as having fewer moving parts, being easy to services, more tolerant of contamination than various other designs and fairly inexpensive. Gear pumps are fixed displacement, also called positive displacement, pumps. This means the same level of flow is produced with each rotation of the pump’s 
shaft. Gear pumps are rated with regards to the pump’s maximum 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 tooth of the pump’s two gears and your body of the pump, transport it around the circumference of the gear cavity and then push it through the outlet port as the gears mesh. Behind the brass alloy Gear Pump thrust plates, or wear plates, a little amount of pressurized essential oil pushes the plates tightly against the apparatus ends to boost pump efficiency.
