I have the solution for the Volvo brake servo that sucks brake fluid.

Found a source for the kits needed to rebuild.

Mine managed to empty the res once every 1 1/2 hrs of driving.

I had 2 spare assys along with the ones out of the driver.

I rebuilt all 4 for under $120.

This comes a bit late for Greg

. From dissassembling all,the booster portion is bullet-proof,that mini-master is the weak point. I will post up my info 2-morrow when I find the paperwork. It's 2:40 a.m. and my insomnia is wearing off...
Mark