Combines 550 variable spd problem

[Bernie]

Check the variable speed cylinder. It might have a bad O-ring or just worn out. I've had this happen before.

 

[greenswede]

Thanks. I am kind of suspicious that you are right. No visible outwards problems with belts, pulleys, oil lines, etc. Since it happened so suddenly, perhaps an internal o-ring blew on the pistonIJ gs