Page 1 of 2 trailer ramp door torsion spring winding posted in trailer talk.
Trailer door spring tension.
All mounting hardware included except for mounting bolts.
Edited by xp123 28 december 2015 07 01 am.
I have a 7 enclosed trailer with rear ramp door that has 2 torsion springs.
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.
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.
The torsion springs on our trailer door need adjustment.
I ve installed many garage doors and replaced many torsion springs.
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.
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.
You will find that design assistance here in this article.
These trailer doors work different from a garage door.
You adjust the tension with the door closed.
The springs are under a lot of tension.
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.
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.
Cables are wound on drum and 1 shaft is clamped with vise grips to prevent.
The mounting bracket has two 3 8 holes that allow the installer to bolt the spring to the rear header.
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.
Have two new cables and know how they came off the drums.
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.
I m thinking you may have to adjust them while open because that s when the tension will be the strongest.
The springs used for trailer ramps doors hatches gates and lids are torsion springs.
When starting a new torsional trailer spring design you must know the following parameters.
