Installation of Hanger Brackets and Springs for Tandem Trailer Axles

Question

Question:

i went to a trailer supply and ask for weld on brackets for tandem wheel trailer that we are building her gave me 4 hangers that were like 2 that was for the front spring for both sides and back springs for both side for the middle hangers he gave me two that were 3inch long or more the axles and the equializer dont look right .. but looking at all other trailers its only like an 1inch 0r 1-1/2inch off of where the other trailers are when no load on them..and what the pictures i have seen of what they should look like..i hope what i said makes cents to yall..

asked by: Richard W

0

Expert Reply:

It is not uncommon for the trailer hangers on a tandem axle trailer to be all the same size or for there to be different sizes that can be 1-1/2 to 2 inches different in height when you compare the center hanger to the front and rear. For example, the Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 2-1/2" Front/Rear, 4-1/2" Center # APT8 has that 2 inch difference in size. I've attached an article on suspension to help further as well.

You will want to make sure you position your axles properly and space your hangers correctly as well.

I've attached a photo of typical dimensions used for 3,500 lbs axles and hanger locations.

expert reply by: Jason S

0

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Answer 1

Equalizer #TREQE1 does not have a weight capacity itself. It isn't bearing much of the weight compared to other components in a trailer suspension set up. If you have a tandem axle trailer then you could potentially use kit #APT5, #APT3, #APT9,…

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Answer 2

There will be different dimensions between the hangers. From front to back your hangers for that 20-3/8 inch spring like #e84SR will be 24-3/4 on center then 29 inches on center and finally 24-3/4 inches on center. This will put each of the 3 axles…

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Answer 3

Having the shackles below the equalizer would put the leaf spring out of level. Also, the equalizer wouldn't want to function properly and most likely the shackle would end up flipping over to the top of it or binding up/putting undue stress on…

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Answer 4

The most common 5-bolt trailer wheel lug pattern is 5-on-4-1/2, but since there are actually four different 5-lug patterns in use you will want to refer to the linked article for help determining which you have. You will also want to verify the size…

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Answer 5

That depends on the width of the equalizer used in the suspension setup. Let's say you were using the tandem hanger kit part #APT8 though which has a 7-1/2 inch wide equalizer though. The distance between the hangers would be 28 inches using the…

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Answer 6

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…

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Answer 7

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…

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Answer 8

I attached a picture that shows the proper position of shackles and equalizers on trailer suspension. Sometimes the shackle will flip up but if you jack up the trailer by the axle that's got the shackle flipped you can usually get it to flip back…

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Answer 9

In order to retain the same suspension geometry, when you replace shackles you should use the same length replacements. Going with a shackle that is too short will not allow enough articulation in the suspension, and cause a very rough ride. Using a…

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Answer 10

It depends on the leaf springs you are using. Basically you will need to mock it all up before permanently installing anything on the trailer. Generally speaking the distance between hangers would likely be 24-3/4 inches on center to 29-1/2 inches on…

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Answer 11

For your double eye springs that are 25-1/2 inches, it is likely your hangers are 29-1/2 inches apart on center and your springs most likely were originally 25-1/4 inches as they will stretch slightly over time. For instance if you were to use 25-1/4…

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Answer 12

Ff the springs you are installing are 25-1/4 inches, you would need to place the hangers between 24-3/4 and 25 inches apart. The shackle should be angled as the drawing shows in the attached helpful article, which should be toward the rear of the…

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Installation of Hanger Brackets and Springs for Tandem Trailer Axles

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