Hydro's weak

[lag]

I have a 616 grasshopper. It's been the best mower ever. The only problem so far is the hydro's seem tone getting weak. Does anyone know where I can get a good parts breakdown or the part number for a rebuild kit. I hear both sides of people saying you can and can't rebuild. With the ridiculous cost of buying new hydro's I beleive I am going to rebuild this winter. Does anyone know of any cheaper hydro's?From what i'm told the balls in the pump are the main issue to make sure you don't forget which goes in which hole in the pump. Is there any other option on the hydro as far as retroing the hydro's to a new style. Any help or suggestions is much apprecieated.

Thanks
LAG

 

[Young grasshopper]

They have a guy that rebuilds them at the factory so I'm pretty sure you can get a rebuild kit for it

 

[lag]

Thanks.
I'll try to geta part number.