Recommended Replacement Leaf Springs for 2005 Keystone Raptor D3612 Fifth Wheel

Updated 08/05/2015 | Published 08/04/2015

Question:

Hello, I have a 2005 Keystone Raptor D3612 Fifth wheel trailer. I need new leaf springs. Do you know what leaf springs this trailer uses? Thank you.

asked by: Peter

Expert Reply:

Trailer manufacturers typically don't list the specific leaf spring specs in their product information but I did call Keystone to see if they could provide the necessary details about your 2005 Raptor D3612 fifth wheel, such as axle capacity, spring length, etc. My contact there was not able to provide this.

What you can do is check on the axle's safety sticker or I.D. plate for its rated capacity. You can also observe how many leaves there are in the springs. The other things you need to know are the width and length measured from eye to eye and its width. This length measurement can be tricky unless you actually remove the spring from the suspension system. Leaf springs can actually stretch after many years and miles, up to about 3/4-inch, so when you remove the spring you may find it measures slightly longer than current replacement springs.

You can use the linked page for double-eye springs to find suitable replacements. Let's say your axle capacity is 6000-lbs and your spring is a 5-leaf type. If you measure it as 25-3/4-inches to 26-inches from eye to eye then a good replacement spring is # e34SR, which is 25-1/4-inches long.

Always replace the springs on both sides of the trailer to ensure even geometry and that it tracks correctly.

expert reply by: Adam R