Something bad wrong with your tractor or someone has worked on it and didn't use the correct Filter, oil or you bought one with a tranny going bad.
Mine is a beast!! i can run it up against a tree & it keeps digging. Can't stall one that is in good working order.
We had 20" snow storm over the weekend and I pushed snow for about 12 hours the last two days for me and about 5 neighbors. Chains, No wheel weights.
10W-30 Premium Motor oil for the Hydro (5 Qts if drained properly)
WIX Filter 51410 (without the check valve in it) I think you have the wrong filter & its starving for fluid.
See the pictures, First passed almost made it to the bottom, but you can see the mound of snow in front.
moved it and had no problem after that. Second & third was end results, Last picture is a neighbors driveway 200 + feet long I plowed for a widow woman, about an hour or so...
Where can I find a Belt Guard with the vent holes like yours??