Are there some trailer couplings that cannot be made to work with the Powrhitch Model 2 and Heavy Duty trailer movers?
Yes, we have found a few types of trailer couplings where some difficulty arises because of the design of the coupling itself. These are generally known as “surge brake” type couplings and are rather easily identified by a hydraulic or brake fluid reservoir sitting on top of the coupling. These couplings apply force to an internal activation mechanism when the brakes of your towing vehicle are applied. This force then activates the trailer brakes. Because of the fact that the Powrhitch Model 2 trailer mover attaches to the coupling by dropping down onto the ball on the top of the threaded post coming from the chassis of our machine, the same forces are applied to your surge brake mechanism when you attempt to back up your trailer. Apply power to the machine by backing up and your trailer brakes engage and you go nowhere. Here are the models we have identified that have presented some problems. Pacific Boat Trailers This company manufacturers an excellent line of boat trailers. However
