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

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 2

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 3

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 4

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 5

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 6

The cables with the Conventional Ramp Door Springs like part #M394FR are attached to the door via anchor brackets which are included with the kit. I have attached below the excerpt from the install instructions below which goes over the cable…

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Answer 7

The cable for the Conventional Ramp Door Spring #M394FR needs to always come off the bottom of the drum. If it comes over the top, the system is installed backwards. It should be noted that it is recommended that only individuals who have experience…

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Answer 8

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 9

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 10

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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Answer 11

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 12

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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

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