Will the Conventional Ramp Door Spring Fit My Door with Brackets 81 Inches Apart

Question

Question:

I have an enclosed trailer, the single spring shaft is bent. I was looking for a replacement and found your dual spring model. The brackets on my trailer are 81inch apart. The pulley dimension ,outside to outside, 88 1/4. Will the M394FR work for this application?

asked by: Tommy D

1

Helpful Expert Reply:

Yes. The Conventional Ramp Door Spring for 8' Wide Enclosed Trailer # M394FR fits 67-3/4" to 95" wide trailer doors. Your door with the brackets 81" apart falls in this range, so this spring will work well for you.

expert reply by: Erik B

1

Answer 1

Hey Scott you will need to get the width of your ramp as well as the weight of the ramp to pick out what you'd need. For example the part #M394FR is for 8 foot wide ramps and has a weight capacity of 185 lb. I attached a link to all of the…

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Answer 2

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…

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Answer 3

Sounds like you are looking for a rear door/ramp spring kit for your trailer. For that we have the Enclosed Trailer Ramp Spring #ERS120D81 which would work well. This should work well for you but I also attached a picture of it's dimensions for…

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Answer 4

The 120-LB #M354FR is going to likely be a better option with the door weight between 125-130lbs. While the 150-LB #362SA8207 will work the higher weight will make the door want to raise up off the ground which can be troublesome when trying to load…

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Answer 5

You did not mention what specific dimensions you were looking for, so I took several. I then produced a pictured showing the measurements. The blue arrow indicates the center to center distance between the mounting holes. The green arrow is center to…

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Answer 6

To determine the correct weight springs you will need a scale to determine how much weight is on the door when it lays out on the ground. You will place the scale on the ground in the center of the landing path of the door edge. This will tell you…

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Answer 7

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…

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Answer 8

If the weight you would be lifting is the weight of 80 lbs then yes you'd only need the part #M384FR to help lift it. This would have enough capacity and could be wound to basically make the ramp feel like its very light.

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Answer 9

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…

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Answer 10

Normally the trailer ramp springs like the #362SA5 attach to the inside of the top of a trailer door like the picture I attached shows. In the picture you can also see how it attaches to the ramp as well.

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Answer 11

The spring capacity of the torsion style ramps springs like the part #M394FR that you mentioned is how much lifting strength it is capable of if adjusted for it. This spring has a 185 lb capacity but could have a lower tension used if that's too…

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Answer 12

We have a couple options for trailer ramps springs. The first one will work great if your ramp rides on a 1-1/2 inch shaft. For that you would want the Ramp Spring - 2K Torque for 1-1/2" Shaft - RH #RS16933RH or #RS16933LH. Or we have ramp…

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Will the Conventional Ramp Door Spring Fit My Door with Brackets 81 Inches Apart

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