The # e47SR leaf springs you'd looked at are designed for 6K capacity axles.
In order to get an accurate measurement of your leaf springs, you'll need to put the 5th wheel up on jack stands so the axles hang freely. Then measure the center eye to center eye length of the existing springs. This is very important because leaf springs tend to flatten out over time. If you have tandem 6K axles, it's very possible that your leaf springs have flattened out by 5/8 of an inch.
To confirm, you'll... view full answer...
A 5200 lb axle is actually a 6000 lb axle that's been de-rated by using a different outer bearing.
The proper replacement leaf spring will depend on how long the original springs are. Because leaf springs flatten out and become longer as they wear out. To choose the proper replacement, you'll need to know if you have a double eye or a slipper spring. You'll also want to measure the springs by jacking the trailer so that the axles hang free. You'd then measure the center spring eye to center... view full answer...
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