Re: reese 18k
Hey gary phillips, it's my understanding that when the Reese hitch is closed and locked the weight pressure while towing is on the hitch locking mechanism to stay closed. I hate to say this, but in almost all documented cases the fault was shown to be after technical examination of the hitch, operator error.
The best way to hitch/hook up the king pin to the hitch, is to have the king pin slightly lower than the hitch when you back on to it. If it is higher, you may be to high to get a proper connection to the neck of the king pin. Then lock it closed with a padlock.
Now having said this, I must point out, I have owned and been using a Reese 18 K hitch for the last 13 1/2 years. You have certainly got my attention.