I'm about to replace the VR on a 19" K7000, due to getting HV shutdown activated which is in turn "fixed" by taking D10 out of circuit. Indeed, I'm getting over 160 V at the regulated side of the B+ resistor.
In the past, this VR had been replaced by an NTE equivalent 1741. Whomever replaced it used a bunch of thermal compound between it and the little plastic insulator and the chassis frame.
The insulator looks to be intact, but I am not so sure this compound should be here and going to clean it off, for fear of it being the electrically conductive type.
Should there be any of this stuff applied here at all? I haven't replaced a VR on a k700 in a few years now and can't remember.