Spring over axle conversion.
Submitted: Tuesday, Jan 01, 2008 at 16:25
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Dirty Dan
I want to do a spring over axle conversion on new trailer but am wondering if I need it to have engineer certificate etc.
Not sure I'll do it if not legal.
Reply By: furph - Wednesday, Jan 02, 2008 at 07:55
Wednesday, Jan 02, 2008 at 07:55
DD.
There can be pitfalls in this exersize:
Where the axle is over the spring the clamping plate is pulled up snug to the curvature of the spring by the U bolts.
When the axle is below, the clamping plate is tending to only bear against the top spring leaf at its ends, leaving a gap in the centre of the spring. Flexing of the spring pack as the axle pushes up can cause U bolt loosening and for the spring to break across the centrebolt line.
If you draw a single line sketch of the 2 setups you will see the difference.
The solution (as done on vehicles built with spring over) is to have clamp plates over and under the spring, machined with curves to match
the springs.
furph
AnswerID:
279299
Follow Up By: Dirty Dan - Wednesday, Jan 02, 2008 at 19:09
Wednesday, Jan 02, 2008 at 19:09
Thanks for the reply furph.
This is also something to take into consideration.
I'll get started on it this week if I get time and see how it looks.
Understand what u mean but will get a better perspective to see it on the trailer. If
the gap is too much I'll have to look into the machining idea.
Thanks again for the info.
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