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Old 07-25-2015, 10:33 AM   #15
Rivet Master
1974 Argosy 20
2014 20' Flying Cloud
Kooskia , Idaho
Join Date: Jul 2009
Posts: 4,591
I was never suggesting that the electric brakes should be used for parking brakes. That is both silly and stupid. They were and are not meant for parking brakes.

My comment was that the brake magnets will not "burn up in a few minutes" if fully applied. I cited my personal experience with mine being accidentally left on for 3 days with no consequences. Three days is a lot more than a few minutes.

And yes, it is only one experience and the brakes and magnets were relatively new, that is less than a year old. Maybe old ones fail more easily after they have been used for many years, but I still very much doubt that they fail in a "few minutes" if left on or activated.

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Old 07-26-2015, 09:58 AM   #16
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dalemonroe's Avatar
2008 16' Safari
Portland , Oregon
Join Date: May 2013
Posts: 43
Parking Brake

Originally Posted by TimeForFun View Post
I would like to add a few thoughts on electric brakes. An electromagnet is made up of many windings of wire. The wire is insulated with a thin coating of varnish like material. The heat can build up over time and melt the varnish. The wires may short internally and this will cause more heat. It will just destroy itself. Anyone try to remove a 25 watt incandescent bulb while it is on. That is a lot of heat. Also the manufacture doesn't recommend using them as a parking break. After working on my breaks it looks to me like the vehicle has to be moving before the breaks will work. Bottom line. They are not parking breaks.
It would not work very well for the reason above. The magnet sticks to a spinning disc when the vehicle is moving and the force of the spinning disc forces the brake shoes against the drum.

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Old 08-02-2015, 06:45 AM   #17
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1987 32' Excella
Nepean , Ontario
Join Date: Mar 2006
Posts: 1,158
Originally Posted by batman View Post
Someone correct me, I think some countries in Europe require travel trailer to have a mechanical (parking) brake.
However, I see no real need for a parking brake. I do not (and would not) park on steep slopes or grades. Chocks work great for me!
I have hydraulic disc brakes on my Safari which uses an electric/hydraulic actuator. I have never tried to use them for parking brakes. I wonder???
I used to have a small English trailer that had a surge brake with a hand brake for parking it. In fact, I think if you take the factory tour at JC, you will see that the trailers made for the European market have the surge brake with a hand brake for parking.

My experience with the hand brake was not good. I had parked and was told to move my g*&# d^*&# trailer "forthwith". So I hitched up and took off forgetting to release the hand brake. This caused the return spring on one wheel to overheat and break. Finding a replacement was impossible, so I took the spring off the other wheel and had it duplicated. Unfortunately, they duplicated it exactly as per the one I gave them, whereas it should have been wound the other way. It kludged it and it worked for the next 5 or 6 years that we had that trailer.

AIR 12148
1987 Excella 32-foot
1999 Dodge Ram 2500HD Diesel
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