I have a 2010 Cub cadet Yanmar sc2450. I’m having problems with the three point hitch raising and lowering I recently change the hydraulic fluid and filter. Today I’ve noticed when I get the three-point to go up if I move my front loader the three point starts falling. I also have to raise it very slowly or it acts like I didn’t even try to lift it.I’ve had this tractor for about four months now when I first removed the backhoe I noticed this problem I disassembled the lift valve inspected it for scarring everything inside of it looked good I replaced the O-rings reassembled and everything work good for about three weeks now we’re back to this problem. Any help is much appreciated.