Tom,

It's gotta be that HF hitch. Look on the underside and you should see a
nut or bolt just aft of the socket where the ball sits. It is meant to
be adjusted tightly enough so the "fork" plate (making up terms as I go
along here) which grips around the neck of the ball can't come off. That
nut should have some kind of spring arrangement above it to give the
plate some flex, but not so much that things come loose.

--
Jack "Rocket j Squirrel" Elliott
1984 Westfalia, auto trans,
Bend, Ore.

On 08/28/2012 12:45 PM, Tom Buese wrote:
> As far as I can tell, 1 7/8" ball w/ correct trailer attachment for same&
> I couldn't pull it off when tugging up on it w/ lock in place, but the
> trailer is very light&  the suspension is stiff, so when it is empty&  hits
> something that causes the whole trailer to bounce in the air, it can come
> off!  Put a load in it or drive on smooth roads, no problemo.  I've had
> this trailer for 7-8 years&  been coast to coast w/ it, but always loaded.
> This time we went empty to pick up stuff,&  that's when the issue occurred.
>
> I think I will replace the lock mechanism&  see if it makes a difference?
>
> YMMV,
>
> Mr. BZ-what goes up must come down or off.
>
> On Tue, Aug 28, 2012 at 12:13 PM, Rob<vwrobb@gmail.com>  wrote:
>
>> Quite the adventure, figured out the mpg problem&  had a happy ending!
>> I'm curious as to why the trailer kept coming off the ball? Sloppy lock
>> mechanism?
>>
>> Rob
>> vwrobb@gmail.com
>> still in western WA state
>>
>>
>>
>> At  8/28/2012 07:35 AM, Tom Buese wrote:
>>
>>
>>   In summary, disconnecting a bad 02 sensor increased my gas mileage by 50%,
>>> driving a HF trailer w/ no load is extremely dangerous to your health&
>>> peace of mind,&  it is possible to urban camp in the NYC area.
>>>
>>> YMMV,
>>>
>>> Mr. BZ-Camping in Manhattan next time?
>>>
>>> --
>>> Tom Buese
>>>
>>
>>
>
>
> --
> Tom Buese