My trailer door is an easy 500 lbs and as i remember it has 5 turns on the springs.
Trailer ramp door spring assist adjustment.
Ramp door spring assist overhead.
All mounting hardware included except for mounting bolts.
Unit is completely assembled cables sold separately.
Plus my spring itself has about 7 full winds on it even with the trailer door closed.
Sizes range from assists for 5 wide trailers to 8 5 wide trailers.
When starting a new torsional trailer spring design you must know the following parameters.
You will find that design assistance here in this article.
The winding pucks face each other.
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.
Initial fabrication of trailer ramp assist spring.
I have a 7 enclosed trailer with rear ramp door that has 2 torsion springs.
Have two new cables and know how they came off the drums.
So my door had to be at least propped open almost 2 feet.
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.
Press brake bend.
Overhead mounted spring assists allow easier closure of trailer ramp doors.
You might also consider taking the trailer to someone who sells them for the adjustment.
Again be very careful and have a helper with you.
The system features a double drum and cable.
Single spring 96 2 x 60 lbs.
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.
So the spring is under substantial tension at the adjuster collars always.
But all trailers are different so this might be an alternative.
The door must be open during the adjusting process.
Cables are wound on drum and 1 shaft is clamped with vise grips to prevent.
Page 1 of 2 trailer ramp door torsion spring winding posted in trailer talk.
7 wide 2 wheel 1 spring.
8 and 8 5 wide 2 wheel 2 spring.
The mounting bracket has two 3 8 holes that allow the installer to bolt the spring to the rear header.
The overhead ramp door spring system is designed for enclosed trailers.
