On Tuesday, December 26, 2017 at 2:16:52 PM UTC-8, David Farber wrote:
I'm servicing a Behringer EUROPOWER PMH2000. The + and - 15 volt regulators
need replacing because the leads have failed. The transistor is mounted to
the chassis at a 90 degree angle and then soldered to the pc board. The
problem is that pc board fits very tightly into the chassis. The leads on
the regulators keep getting flexed with each pc board removal. Anyway, I
want to replace them because a couple of the leads have broken off. They are
packaged in a TO-220 case. The center tab is nonmetallic so it is insulated
from the chassis.

I presume, however, that the tab connects to the chassis for heatsinking?

Best practice if the strain on the component is breaking wires, is to use
a strain-relieved wiring connection, like a few-inches pigtail wiring from the
regulator to a female Molex KK socket; this will plug onto male pins mounted
in the printed wiring board, 0.100" centers spacing just like the LM78xx.

Those regulators are available in fullpak (epoxy insulated tab), metal-tab-wth-hole,
and short-metal-tab (for soldering to a surface mount "heatsink").