Hydraulic steering

[gecko60]

I have just purchased a secondhand Haines Hunter 17C which has a Seastar steering mechanism. The steering wheel has a lot of backlash and feels tight.
Can anyone tell me how to fix this or has a manual I can buy that tells me how I can?

[marco]

owners manual
http://ww2.seastarsteering.com/PDFs/296784-AL.pdf

[mally]

bleed the air out of the steering,check if there is enough oil