The purpose of a header tank is to allow for
the steering gear fluid to expand and
contract due to temperature variations.
The header tank can be used on a manualfilled
system as well as on an auto-filled
system. The capacity of this tank is one
quart (one litre). It is available with or
without sight glass and breather.
It is recommended to have this tank installed
above the highest helm pump onboard ship.
In addition, a manual-filled system should be
installed with a breather or an auto-filled
system should be sealed with a vent line
going from the header to the main tank.
