How do I tell if I need new pads for my lifter?

Replace pads if:

1. Surface of any given mounting bolt is not at least 3/32″ below the surface of the pad.
2. There is any de-lamination of the pad from the backing plate.
3. There is any scarring, chunking, or missing pad material constituting a total combined loss of surface area greater than 3 square inches per pad.
4. There is any single scar, chunk, or missing pad material that is greater than 1 square inch per pad.

Replacement pads can be found https://kenco.com/store/#pads