first off, welcome to the site
next, its kinda impossible to say much about what is worth ding or not, without knowing the history and condition of the machine at hand
as like all things, they wear out from use or abuse
being this ia forum, and all we know is what YOU tell us,, so, its again impossible for me or anyone one else to say whether continuing to repair is the best thing to do here!
as at some point, throwing money at a old worn out machine isn;t the best way to go, some times, money is better spent towards a newer or better condition machine.
SO< what you have to maybe do is break down the history of the machine, how many hours, overall condition , and from there loom at things closely
look at hoses, and pins
are they OLD in need of being replaced NEXT?
all things again wear out , and many things wear out from age alone, , seals , hoses, tires and so on can all age from time passing by, sunlight, or just drying out!
SO< MY best suggestion to you is, be honest with things,. look machine over, and go from there
just throwing money at something and hoping it lasts, is a fast way to go broke!