Most likely it will need a rebuilt hyd. pump or at least new seals in the current one. The PTO shaft extends through the pump and needs to be removed prior to removing the hydraulic unit. I would suggest that get a shop manual to help you.  [url:1kncsi40]http&#58;//www&#46;floydcountymuseum&#46;org/[/url:1kncsi40] would be the best source for a factory manual that has detailed information. You can find parts suppliers by clicking on the HPOCA flag, upper left of this site and then click on &quot;Links&quot; which will connect you to various suppliers and rebuilders.