External gear pumps are most widely used in modern oilhydraulic systems.Marzocchi POmpe has developed its own range of products with a news series of pumps named GHP where groups named GHP1, GHP2 and GHP3 are suitable for the most different application in both industrial and mobile sectors. These gear pumps usually consists of a gear pair supported by two aluminium bushes, a body, a securing flage and a cover.