Have two new cables and know how they came off the drums.
Trailer ramp door spring assist adjustment.
A typical horse trailer or utility trailer ramp uses 3 4 inch hinge pins and would require two ramp springs with a 3 4 inch inner diameter.
Plus my spring itself has about 7 full winds on it even with the trailer door closed.
Initial fabrication of trailer ramp assist spring.
Single spring 96 2 x 60 lbs.
You will find that design assistance here in this article.
Since 1982 all metals supply in oroville ca has provided metal processed metal and industrial hardware to northern california repair shops and industry and manufacturing.
The system features a double drum and cable.
All mounting hardware included except for mounting bolts.
So my door had to be at least propped open almost 2 feet.
The door must be open during the adjusting process.
Page 1 of 2 trailer ramp door torsion spring winding posted in trailer talk.
7 wide 2 wheel 1 spring.
Press brake bend.
8 and 8 5 wide 2 wheel 2 spring.
The overhead ramp door spring system is designed for enclosed trailers.
You might also consider taking the trailer to someone who sells them for the adjustment.
Unit is completely assembled cables sold separately.
The winding pucks face each other.
Overhead mounted spring assists allow easier closure of trailer ramp doors.
The mounting bracket has two 3 8 holes that allow the installer to bolt the spring to the rear header.
When starting a new torsional trailer spring design you must know the following parameters.
Again be very careful and have a helper with you.
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.
My trailer door is an easy 500 lbs and as i remember it has 5 turns on the springs.
So the spring is under substantial tension at the adjuster collars always.
Sizes range from assists for 5 wide trailers to 8 5 wide trailers.
I have a 7 enclosed trailer with rear ramp door that has 2 torsion springs.
Ramp door spring assist overhead.
But all trailers are different so this might be an alternative.
We ship over 35 000 pounds every day and offer a huge variety of material types shapes and fabrication hardware as well as the following processing services.
