OBSOLETE - REPLACED BY 7243
The 7143 and 7153 are used in power steering systems to allow use of the helm pump when power-driven hydraulic pumps are not operational. The 7143 / 7153 retain the hydraulic fluid in the steering system preventing fluid loss, ensuring the helm pump is still functional.
When used on a 7147 or 7148 Power Assist Unit from Kobelt, it is important to have a buffer system to allow for shifting to manual mode. The 7143 / 7153 requires a minimum pressure of 200 PSI (13.79 BAR). Photo shown is of the 7143.