Today well be taking a look at part number PR3, the 3-Leaf Double-Eye Spring for 3,500-lb Axles.Youll notice that it does have 3 leaves as indicated in the description. These leaves will give it the ability to support 1,750 lbs. When you multiply that by two, you get your 3,500-lb per axle spring capacity.Youll notice it has two 9/16 mounting eyes. These eyes are lined with a a nylon bushing. The nylon bushing will help to prevent metal on metal contact while the spring is on the trailer.When you order a spring you do need to know a few things first. This spring measures 25 inches long by 1 inches wide.
Youll need to know the springs half-length which is measured from the center of the eye mount to the center of the spring here at the leaf bolt. This springs half-length is 12 5/8 inches. The final measurement you will need to know is the springs height. To get this measurement, well draw an imaginary line from the center of the eye to the center of the eye on either side of the spring. And using this line you can we can get our height from the spring surface to that line.
This spring has a it is 3-inch height.And that does it for part number PR3, the 3-Leaf Double-Eyed Spring for 3,500-lb axles. .
Today on This Old Trailer, we are going to inspect and replace some shackle links. This part right here is a shackle link. And you can see here, we are actually moving it back and forth. That really should not happen. In fact, you can see if you pull it up how far the hole is worn out. Now, normally when you see a gap down here, it indicates that it is worn out too. That defiantly needs to be replaced. Now, we have the whole trailer on jack stands. And we have an additional jack underneath the axle just to help support it in case something moves around. To remove and replace them, you just have to remove these two bolts right here called the shackle bolts. However, this is a very old trailer and pretty much everything is rusted together. So at this point, we are just going to have to cut them off and start over new. We will go ahead and double check the equalizers as well. 0:51
Today on This Old Trailer, what we will be doing is replacing a broken leaf spring. In this case, the style of the spring is a slipper spring. The first thing we need to do is take off our wheel, which we have already done. We will go ahead and point out the problem. You see this edge on the top leaf of the spring, it used to be right down here, connected in one piece. :33
Today were going to show you how to install a typical leaf spring onto a trailer. What we have here is a typical 4 leaf spring on a 3500 pound axle. The first step involved is loosening this bolt here and this bolt here on the bottom and this top one we do not have to worry about for now. The next thing we have to do is loosen these U-bolts here. The nuts are on the bottom, so we loosen these out so we can get our axle away from the spring. What were going to do first is take off this bolt and then well come around and do this one. Were going to let this spring down and our axle is going to hang down a little bit. What we did was keep the axle tight on the other side so it will come down some but it will take off most of the weight so that way we can do one at a time.