Springs......

[Mark Sierant]

Do at home if you have a Press, take the main leaf and mark in chalk 1inch increments from the centre bolt out to about 6 inches from the bolt on both sides. Now place the spring in the press so that it is supported about 4inches from the press head on either side. Now apply preasure to your first mark until you can see the suface tension change on your spring. IE rust will start to sprinkle off, back the preasure off and move to your opposite chalk mark and start again.
Move back and forth on your marks until completed, then offer your main leaf up to your truck shackle points. You should end up about 5 degrees past the centre point in the direction of travel of the swinging shackle.

Adjust as required, never apply preasure to the centrebolt posistion directly as it is the weakest point. Once your main leaf is fine use this as a template for the rest of the spring pack.

This should take a couple of hours per spring.