Quote Originally Posted by Prometheus2017 View Post
The main thing to watch for is seals. If you leave it on them it can cause them to fail.
Yeah dead right.
I've been an engineering manager for over 30 yrs and while WD40 has it's uses on externals never allow it to penertrate the internals. Complex pneumatic valves in high speed production machinery was very often ruined when WD40 was used as an easy fix for sticking valves. It destroys air seals very quickly.