Trouble Installing Trailer Ramp Door Spring  

You will need to measure to be sure, but I believe the Enclosed Trailer Ramp Spring - Dual Spring, 81" Wide #ERS120D81 will fit your 18 foot Haulmark Trailer and I've included the dimensions of this hit for you. Each spring is 22-1/2 inches…

I checked with M-3 and when you are ready to wind the spring on the Enclosed Trailer Ramp Spring #ERS120D81 you will need to use two 1/2 inch diameter bars (of around 18 inches long). You will insert the first bar into the winding cone of the spring…

To test the weight of your ramp door, you will want to get the door all the way down to the ground and then on a scale of some kind (a bathroom scale can be used for this if it's the only thing available). This will be when the door is at its…

The dimensions you listed for your ramp spring door mounting brackets are pretty wide but the Enclosed Trailer Ramp Spring #ERS120D81 would be a great options as it's overall width is 81 inches and it can be cut to your specific length.

The spring with the black cable drum should always be mounted to your LEFT, standing on the inside of the trailer looking out. This is very important for proper operation. Dual spring systems, like #ERS160D96, have a red-coned and a black-coned…

Thank you for all of the info you listed for your enclosed trailer ramp. The best option is going to be the ramp spring kit part #ERS120D81. This is 81 inches wide and has capacity of 120 lbs. This is more capacity than you'd need but it can be…

You can use the 81 inch ramp spring #ERS120D81 if you would like. The springs and pulleys are held in place with set screws, so you can move the springs closer together and tighten the set screws down to keep the springs and the pulleys in place. I…

There are a couple of possibilities here. First, it could just be a ground issue on the utility trailer. You will want to check the main ground from the trailer connector and the taillight grounds and make sure they are attached to clean and…

It sounds like you have a 7-Way and are using a 7 to 4-Way adapter because the trailer has a 4-Way flat. If the running lights are not working with this set up, the first thing you will want to do is use a circuit tester, like #PTW2993 if needed, and…

In order to help diagnose the problem, I would first need you to check that both trailer connectors are properly wired. You can do this by using a circuit tester like part #PTW2993. You will then need to have a friend sit in the vehicle and perform…

I do have an option for you but the Stromberg Carlson 4000 Series 5th Wheel Louvered Tailgate part #VGD-10-4000 does not have a spot for the factory backup camera. Therefore you would either need to find a way to mount this yourself, go without, or…

Most manufacturers are in the process of discontinuing their fifth wheel tailgates with the camera relocation kits due to mechanical issues. Therefore I could not find one that fits your 2017 Ford F-350 Super Duty. The Stromberg Carlson 4000 Series…