billcoleman

I replaced mine myself. As I already had both subframes out of the car and all four corners stripped down, it was a fairly simple job.
If your car is still intact, the hardest job is to pull out the rear driveshafts which requires the hubs to be removed.
The fronts are easier to remove.
Then, as Cobber said, make sure the surfaces are nice and clean before fitting the new ones.
I did heat them with a hot air gun, but they cool down so quickly, they get stuck before the final position is reached.
Really you need a tube with a slightly bigger diameter than the rings to press (hammer) them on squarely, but I resorted to tapping (carefully) to the final position with a flat punch. Be carefull not to bend them.
After fitting, give them a good coat of paint. This doesn't effect the sensing but should stop them rusting again. I also coated the painted rings with Waxoil.
If your LE500 is anything like mine (was), everything was rusted together and very difficult to dismantle.
As the hubs are removed, this is a good opportunity to replace the wheel bearings if required.