have 2005 cubcadet model gt1554 after 10 min. it hardley moves?

Question

this is hydrostatic .replaced drive belt and still same thing .
can not add oil to hydro because iit is sealed from factory
only does it when oil seems to get warm

Answer 1

There is a rod or accuator that you can pull to set the trans for "bypass" to push the mower by hand. Find this (usualy at the back of the tractor) and move it in and out several times. It may be not completely seating in the drive valve assembly.