There is a damper inside the tongue. Eventually it fails, and these
noises are probably an indicator of that. On the Wings And Wheels
website Tim has put a diagram and some directions on how to replace
this part. I have replaced a couple of these on Cobra trailers.
The tongue is manufactured by Alko, and there are many different
shocks so contact the Komet distributor with information on the
trailer year and all the numbers on the tongue that you can find.
Jim
http://www.wingsandwheels.com/Tongue%20detail.htm