Backing up a cobra trailer uphill. Is it safe ?

On Friday, October 16, 2015 at 8:20:05 PM UTC-6, wrote:
I have a steep driveway where I want to park my Cobra trailer.
Is it safe to backup the trailer up the incline ?
This means that the run-up brake will be completely compressed.
Can this be done without any damage to the mechanisme ?
Is my understanding correct that there is some kind of free-running mode on the brakes when pushing backwards ?
3U

No problem with the brakes if they are properly adjusted but I've encountered two situations where a trailer hitch popped off the ball damaging the rear of the tow vehicle when backing up a steep driveway.

It seems that some ball hitches don't like a large positive angle (trailer angling upwards with respect to the car) when combined with backing loads.

This led one owner to use an electric winch inside his garage to pull the trailer in without risking his car.