Trailer Door Spring Tension

The mounting bracket has two 3 8 holes that allow the installer to bolt the spring to the rear header.

Trailer door spring tension.

The overhead ramp door spring system is designed for enclosed trailers. Ramp door hinge style m 3 spring assist systems are designed to be used on doors with pipe style hinges attaching the ramp door to the trailer frame. Trailer ramp springs are heavy duty torsion springs which work as a lift assist to take the majority of weight off of the gate ramp lid. You adjust the tension with the door closed.

Recently our polar pj trailer hybrid snowmobile trailer polar sport enclosed trailer had a stuck door it would not pull open either it was frozen or ja. The cables could not be detached with the ramp door lowered because the springs would suddenly lose tension and they could break and that is very dangerous. I recommend having a garage door company take a look at it to determine if anything can be done to fix the existing system or if a new system is needed. Edited by xp123 28 december 2015 07 01 am.

I m thinking you may have to adjust them while open because that s when the tension will be the strongest. I have a 7 enclosed trailer with rear ramp door that has 2 torsion springs. Single spring 96 2 x 60 lbs. Torsional torsion springs designed and manufactured to be installed into gates trailer ramps doors hatches and lids to complete a leverage function by making it easier to lift or lower the gate ramp lid or door.

Have two new cables and know how they came off the drums. The system features a double drum and cable. The torsion springs on our trailer door need adjustment. The springs used for trailer ramps doors hatches gates and lids are torsion springs.

You will find that design assistance here in this article. The winding pucks face each other. All mounting hardware included except for mounting bolts. When starting a new torsional trailer spring design you must know the following parameters.

Spring type hinges should not be used with m 3 spring assists as they alter the physics of the door and you will not achieve satisfactory lift. The springs are under a lot of tension. With an enclosed trailer ramp spring ers120d81 when the door is lowered it will pull the cables which will turn the pulleys and put tension on the springs. Page 1 of 2 trailer ramp door torsion spring winding posted in trailer talk.