How to repair a low output signal on an HP 3640B signal generator.

This video shows the most common problem that causes low output in the HP3640 signal generator. A straightforward method is shown to verify if this is the problem and what part replacement solves the fault.

[@1337itjosh]

if you popped the lower one off and it had no grease.. wouldnt it be smart to check and add grease to the upper?

[@FranksPlace-jk7pj]

I only filmed the one that was faulty, but it would make sense to do both.