Do you have a front hyd angle blade on the unit?
And it does not angle??
There must be a blade or something coupled to the front outlets to determine if they are operative.
I assume the deck lift is working?
Pull the fuel tank and front dash cover to observe the hyd linkage.
May just be loose and slipping on the shafts.
Swap the valves rt to left in order to test them.
Either the forward or reverse may be stuck (if manual valves) or defective or dirty in some way if automatic pieces.
The auto valves are the tall units and the manual valves are the short ones with a tit in the middle. If one of those tits is stuck down, therein lies your forward/reverse issue. Caution: clean the areas around the valves THOUROLY before removing them to avoid debris from falling into the unit.
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