Recently my Manfrotto 161mk2b is starting to vibrate and making noise when you drop the center column. It always happens when the lever is between 11 and 2 o'clock. When this happens the closest leg or the thin metal tubes on the on the exterior of the center colum tube is also making noise (ticking noise)
Also you feel a little more tension in the lever between 11 and 2 o'clock.
The tripod is never used in sandy environments. I used some high pressure air to remove dirt/dust if there was any at all and some WD40, but i didn't help at all.
Further if you gently apply pressure to one side of center column the issue is gone, or what also helps is to push the lever a bit like if you would lock it.
What could be the culprit?
BTW, i never disassembled the tripod, because i am not sure if i can do this without a tutorial or manual. I recently contacted Manfrotto, but haven't received a reply yet.