I agree with Squizzy, you got a more major problem either in the pump or valving. I guess it could be in the motor for the front drum, and maybe the vibrator drive side too.
Pull your hydraulic filters and cut them open to check for debris and excess metal. Get the dealer out to perform some presure tests. It may take just starting at the pump and going on down the line tearing things apart till you find the problem. Make sure the motor mounts are good and that the pump is lined up properly.
I never had any trouble with Bomags, they are one of the best vibratory compactors on the market in my experience. But, there's always one............. Good Luck!