L4200 hydraulic not working in back

[Nascar46747]

It has set for a year its a 94 have no hydraulic to the three point hitch i had a friend change a line to the hydraulic pump while it had ben sitting I am not sure but I think it is a power steering line has a hollow bolt that holds it on I took the bolt off and there was just a spring in there should there be some kind of orfice just seems funny just a spring just wondering if they lost something when they changed it I couldn’t really tell by the book thanks Jim