Tandem-Axle Trailer Hanger Kit for Double Eye Springs - 3-1/4" Tall Front/Center/Rear

Ask the Experts about this etrailer Trailer Leaf Spring Suspension

• How to Find the Correct Replacement Equalizer
  The Tandem-Axle Trailer Hanger Kit for Double Eye Springs # APT5 may have the correct equalizer but you will need to measure the current equalizer to find out. The length from the center of the left-most eye to the center of the right-most eye of your equalizer needs to be the same as the 7-3/4 inch measurement in this kit. Since you said the shackles are hitting the frame I recommend using a kit with a center hanger that is longer than the 3-3/4 inch hanger that comes with Kit # APT5....
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• Replacement Suspension for Tandem Square Axle Venture Boat Trailer
  I reached out to the manufacturer but they are not currently able to look up VIN numbers for part assistance. I was able to find on their website that the square tube axles are either 2000 lbs capacity each or the more common 3,500 lbs capacity each. Most of their trailers utilize the 3,500 lb axles and I believe that is the case for all their tandem axle trailers. For your trailer you can use the following: -Tandem-Axle Trailer Hanger Kit for Double Eye Springs - 3-3/4" Tall Front/Center/Rear...
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• Replacement Suspension Parts for 18 Utility Trailer
  If you have a serial number on your trailer axle or a plate or sticker on it that will list the VIN number, you can completely confirm your axle capacity but a 3" axle measurement would usually indicate a 5,200lbs or 6,000lbs axle. The Tandem-Axle Trailer Hanger Kit for Double Eye Springs # APT5 would be a sufficient capacity kit this application. For leaf springs, #PR4 is for a 4,000lb axle and maybe underrated. The 5-Leaf Double-Eye Spring for 6,000-lb Trailer Axles is also...
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• How to Determine Where to Put Axles on Trailer
  I have added a link to a help article for you which has the formula you need that allows you to determine exactly where to position your axles on a trailer. Using this formula, based on measurements you'll need to take and the weight of the trailer, will determine where you position the axles. As for the hanger kit that depends on the size of your axle and your leaf springs. For example, the Tandem-Axle Trailer Hanger Kit for Double Eye Springs # APT5 is for 2,000-lb to 7,000-lb tandem-axle...
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• Why do Some Trailer Suspension Kits Have Longer Equalizer Hangers
  The reality is that not every manufacturer makes their suspension kits to the same standard sizes. Some use taller hangers with wider equalizers and some might use a taller equalizer with a shorter center hanger. It really just comes down to the preference of the manufacturer and what gives them the ride height and distance between tires that works the best for them. Also the fact that some trailer leaf springs happen to be longer or shorter plays into what is best solution as well. Ideally...
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• Height Increase from Dexter Over-Under Axle Kit K71-384-00
  The Dexter Tandem-Axle Trailer Hanger Kit for Double-Eye Springs # APT5 does include the spring hanger components for a tandem axle trailer like yours. You'll need to determine how much height increase you need. This will tell you if the height gain from over-under kit # K71-384-00 or from the taller hangers will be enough for you. Typically an over-under kit provides a height increase of roughly the diameter of the axle. But a 3-inch taller hanger will not give you 3-inches of height...
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• Recommended Tandem Axle Hanger Kit For Double Eye Springs
  If you use the 5-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/4" Long # SP-111275 which have the same capacity, I recommend the Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4" Front/Rear/Center # APT5 for a tandem axle application. When you follow the attached photo, this will give you the 33-1/2 inch axle spread. For your 6-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 26" Long # SP-053275, you can use the same system but replace the equalizers with...
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• What Causes Shackle Straps To Flip Below the Equalizer
  It is not uncommon for the shackle straps to flip once weight is lifted off the suspension but if they do so when you have a load bearing then this will not allow for proper load distribution or suspension travel. The cause of this issue is that the leaf springs are too long, the shack straps are too long, or a combination of both. The best option for you to make sure you get the proper spacing would be to change these parts out. If you can let me know the distance between your leaf spring...
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• Help Info for Placing Axle Underneath Car Hauler Trailer
  The 60/40 axle placement formula is a great starting point for where to place the axle. That means putting 60 percent of the trailer in front of the axle center and 40 percent behind it. Basically the goal is to have 10 percent of the total weight of the trailer end up as tongue weight as this will allow your trailer to track the best behind your tow vehicle without swaying. I attached a picture and a help article that covers more on this topic for you to check out as well. Sometimes...
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• Spacing Measurements for Tandem-Axle Trailer Hanger Kit APT5 & Spring SP-051275
  When setting up a new trailer suspension it is best to do a mock-up (by clamping or tack welding the parts in place) to allow you to see how the system functions. There are so many variables that is best to test. Typical spacing dimensions for 25-1/8-inch springs are shown in the chart on the page for # APT5. Since the springs you intend to use, 4-Leaf Double-Eye Spring # SP-051275, are 7/8-inch longer than those listed in the chart, you will want to increase the hanger spacing approximately...
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• Will Trailer Suspension Hanger Kit # APT5 Fit a Trailer with 2-3/8 Inch Diameter Axle
  You can use the Tandem-Axle Trailer Hanger Kit # APT5 for your trailer with the 2-3/8 inch axle. A 2-3/8 inch diameter axle is typically found on 3,500 pound axles which is within the range of this kit (2,000 to 7,000 pound axles). The measurements in the chart on the page can be used as a guide. A better option for a 2-3/8 inch axle is kit # APT3, # AP233-H248, or # APT1. It all depends on the axle spacing, spring measurements, and equalizer length.
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• How to Determine Hanger Spacing for Tandem Axle Trailer Suspension with 26 Inch Springs
  Thank you for providing the specs for the suspension components that you already have. Correct hanger spacing really depends on the components being used such as springs, hangers and equalizers. Most of the hanger spacing dimensions that we have are based on our preassembled kits, so we will use that as a foundation for your setup. First, I would either replace all of the front and rear hangers with 2-1/2 inch tall hangers like part # 115918 or replace just the center hangers with 2-1/2...
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• Suspension Hanger Locations for Dual Axle Dump Trailer
  There are some measurements missing that are important in giving you the exact positioning. I've attached a couple articles to assist with the dimensions you must calculate to get your precise 35 inch on center axles. Your center hanger will be obviously directly centered between the two axles and then your other two hangers will be spaced identically on each side. Your spring from the center of the outside hanger to spring seat location is the dimension that would be extremely helpful....
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• Recommendation For Lifting A Tandem Axle Boat Trailer For More Clearance
  You can use a longer center hanger for the springs, but you will need to add as much height as possible because the spring deflection won't just mean one inch additional hanger length equals one inch of height lifted. Only changing out the center will not give you the additional height of 1 inch you are seeking. My recommendation is that you use a hanger like the Redline Center Hanger for Double-Eye Springs - 5-7/16" Tall - 3/4" Bolt Hole, # 115919, for all your front and rear mounts...
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• What is Minimum Distance Require between Tandem Trailer Tires When Considering Increasing Tire Size
  The difference in tire diameter will be an additional 2-1/2 inches going from the 225/75-15 which measure 28.4 to the 235/80-16 which measure 30.9 inches. As a general rule of thumb the minimum safe distance between front and rear tires on the same side of a tandem axle trailer is 4 inches. You would need to measure the distance between your tires currently and subtract 2-1/2 inches. If that dimension then ends up being 4 inches or greater the axle placement could be left alone. Looking...
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• Where is Height Measurement on Trailer Hangers # APT5 Taken
  The heights of the hangers that come with the kit part # APT5 is the distance from where they attach to the frame of the trailer to the bolt hole center of the hanger.
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• Determining Spring Hanger Spacing for Tandem Axle Trailer Fabrication Project
  Thank you for the measurements you provided and for the photo of your trailer suspension mockup showing the spring components' spacing. As long as your shackles do not hit the trailer frame (you mention 1/8-inch clearance) you should be fine, but if you'd like a bit more breathing room you could increase spacing from 29-1/2 to 30-inches without negatively affecting anything else.
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• Recommended Axle Kit That Will Add 2 to 4 Inches Of Clearance To Your Trailer
  Adding the Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4" Front/Rear/Center, # APT5, will give you a little more clearance, but it won't gain you the 1 inch you are needing with the spring deflection. Another way to lift your trailer would be an over-under conversion kit. This would add way more height to your trailer...probably closer to 4 inches more. This will change the center of gravity on your trailer too, so it is more prone to effects like sway, but will solve...
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• Trailer Suspension Kit and Leaf Springs Recommendation for a Tandem Axle Boat Trailer 4,600 lbs
  As long as you are replacing everything (hangers, springs, hardware, equalizer), then yes, you can use our trailer suspension kit, # APT5. In fact, this is the kit that I recommend for your trailer. The hangers must be welded to the trailer. The holes that you see in the top of the hangers are actually for welding, not bolt holes. For the leaf springs, you will be much happier with the ride quality of part # SP-212275 for 3,500 lb axles. The other springs you referenced are for 5,000...
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• Should Trailer Suspension Equalizers be Level
  If the trailer is not loaded then you will often see equalizers that are tilted like yours. It does not necessarily mean that there is a problem with the suspension. If the springs are worn out then the trailer would easily bottom out. If that is not happening then the springs are likely fine. It is possible that some component is not the right size as well. If the springs are too short or the equalizers are not long enough that can affect the geometry of the suspension.
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• Tandem Axle Trailer Suspension System Dimensions for Best Function
  The Tandem-Axle Trailer Hanger Kit for Double Eye Springs - 3-3/4" Tall Front/Center/Rear # APT5 does not have different size shackle straps. They are all 2-5/8 inches from center of hole to center of hole. If your current straps are different lengths, there are a couple of things to look at. The leaf springs may be different lengths, the hangers may not be positioned correctly, or the equalizer may be off-centered. Ideally you can the hangers, springs, equalizer and shackle straps...
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• What is Ideal Distance Between Suspension Hangers and Equalizer Bolt Centers
  I'd need to know what the length of your leaf springs are be able to figure out the proper hanger dimensions. What you'll want to do is go with the distance between the hangers that allows the distance between the equalizer side bolt center and the outside hangers to be right near 1/2 inch longer than the distance between the bolt centers of the leaf spring to ensure you get the correct shackle angle.
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• Where to Place the Axle on a 4 Foot Long Trailer
  The correct placement for a trailer axle is going to be dependant on the length of the trailer and total weight when loaded. You are first going to want to pick a spot where you think the axle needs to be which is usually about 3/4 of the way back. You will then use a formula which you can see in the attached help article to make adjustments forward or backward until the correct location is found. Please take a look at the attached help article and then let me know if you need any clarifications...
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• Where Place Center Hanger of Tandem Axle when Building Trailer
  You bring up a great question. I attached the picture of the worksheet that you referenced as well. What works best is to first setup the center line for the center hanger so that 60 percent of the length of the trailer is in front of the center hanger and the remaining 40 percent is behind it. That usually gets people the correct placement, but from there you would want to use the worksheet to verify if that is correct.
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• How to Determine Axle Placement for a Tandem Axle Trailer
  To determine the location for the front and rear hangers on your tandem axle trailer you will first need to make sure that you have the correct center point for your equalizer hanger. The center point of your equalizer hanger needs to be located where you will have 60 percent of the frame of the trailer in front of the center of the equalizer hanger and 40 percent behind the center of the equalizer hanger. For example, if the trailers frames length is 18 feet, then the center-line location...
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• Should Loctite be Used when Install Trailer Suspension Parts
  I would not use any Loctite when installing suspension components on a trailer since the suspension components need to be able to move relatively freely. I would be afraid of getting the thread locker on bolt or something away from the threads. If you were to use a thread locker then use the blue kind. The red is way too strong. The blue will allow nuts and bolts to be removed with hand tools. Maybe I'm just paranoid but for me, I wouldn't use it.
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• Determining Center Line of Spindle When Installing Timbren Axle-Less System
  A good way for determining the correct axle placement and spindle centerline when installing a Timbren Axle-Less System like # ASR3500S06 is to attach a plumb bob to each spindle and at the coupler. This will give you a vertical reference line to use when measuring from the coupler and from each spindle, making sure you get that perfect triangle between the 3 components. You can also use a leveling laser the same way. I have attached an installation video that you can use for reference....
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• How To Determine Parts Needed To Replace Suspension On Tandem Trailer
  There are a few differences between slipper springs and double-eye leaf springs. Slipper springs normally have a higher weight capacity, and fewer moving parts, but they tend to ride a little rougher than double-eye. You will need to know the length of the springs you are replacing. Over many years of use they can be stretched up to an inch. Also, it is helpful to know the height from the top-center of the spring to the center of the eye and the length from the center of the eye to the...
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