Silage trailer pto

Hey so I’ve been having trouble unloading a silage trailer’ it started when one of the motors on the trailer started leaking oil so I changed the motor and it started struggling too unload at first’ I would have too press the gas of the truck to unload and if I don’t the truck dies on me so I thought maybe I put a different motor on the trailer so I bought Twonew motors put them on the trailer and nothing changed it keeps doing the same thing’ I need help cuz I’m lost now. Also I changed truck because I said maybe it’s the pto or pump on the truck and no the trailer does the same thing with a different truck someone help

 

I put the same motors it had same brand same everything ‘ no I can’t move it by hand while empty. Bad bearing where if there was? Thanks in advance

 

Yes sir I’ve tried doing that and it does the same thing’ yes I put oil back

 

It doesn’t have a relief valve I don’t think

 

No sir everything is working the same except that problem that I’m having