hydrostat issues

[rhino69]

when I have to move the mower by pushing it I pull the lever at the back to freewheel, problem is when I release the lever ,my hydrostatic won't go it stays in freewheel. is this an electrical switch to take out of freewheeling. it will go in reverse but it slips going forward. any help would be appreciated, thanks it is a 97 landlord fd 501v

 

[mechanic mark]

manual operation, pull rod out to freewheel push rod in to operate,

https://www.simplicitymfg.com/na/en_us/search.html?searchrequested=1692786

see operators & parts manuals, you need to remove deck & replace drive belt & inspect idlers for replacement
https://www.google.com/search?sourc...city part 1707381&aqs=chrome..69i57.32099j0j8

http://parts.sepw.com/?gclid=CjwKEA..._17HP_LC_Hydro/Foot_Controls/1692786/04320049 items 28 & 30

http://parts.sepw.com/?gclid=CjwKEA..._Drive,_Belt_&_Control_Group/1692786/04320021 item 44