Tandem Axle Trailer Suspension Hanger Kit To Provide More Axle Clearance

Question

Question:

I own a 2003 currahee 16 foot 10K rated equipment trailer, pr-5 springs, on 5200 lb axles with 35 o/c. 7-3/4 standard equalizer, center frame clips hole center is 3-3/8 where the ends are 1-1/2, 60 inch out to out. Unloaded, level, only about 1.5 bump clearance, and no noticeable spring deflection. Loaded to less than 6K, I had dented axles. Installing all new components, but should I increase the frame clips height? do not want a repeat. Why are shorter used front and back?

asked by: John

0

Expert Reply:

It sounds as if your trailer suspension was built with the common Tandem-Axle Trailer Hanger Kit, # APT3, and that the springs and attachment hardware are wearing out enough that with the weight you are carrying there is no longer enough room for the suspension to work without contacting the trailer frame.

I would recommend stepping up to the Heavy Duty Tandem-Axle Trailer Hanger Kit, # APT3HD, or the Tandem-Axle Trailer Hanger Kit, # AP233-H248.

The # APT3HD kit comes with 2-1/2 inch tall front and rear hangers and 5-7/16 inch tall center hangers, and will provide for 33-1/2 inch axle centers.

The # AP233-H248 kit comes with 3-1/4 inch tall front and rear hangers and 3-5/8 inch tall center hangers, and will provide for 34 inch axle centers.

You will need to be sure there is clearance at the center between the wheel and tires for these slightly shorter axle to axle center. Your axle center may be measuring slightly longer due to the springs being worn and flattening out over time.

You will also need the U-Bolt Kit for Mounting 5,200-lb to 7,000-lb, Round Trailer Axles, # APUBR-9. U-bolts are installed with locking nuts and are considered one time use items.

expert reply by: Robert G

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Answer 1

The longer hangers are the center hangers. The reason they are longer than the end hangers is because the shackle straps of the equalizer. It is somewhat hard to explain, but the longer center hanger is to compensate for how the shackle straps move…

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Answer 2

The center hangers in the Tandem-Axle Trailer Hanger Kit #APT8 that you recently purchased are indeed longer. This is actually pretty common for tandem axle trailers. The reason for the extra length on the middle hanger is related to the shackle…

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Answer 3

To start with, the 6,000 pound springs I suggest are #e34SR. They're 25-1/4 inch long, 5 leaf springs. I recommend either hanger kit #APT3 or #APT5 with the springs. The difference between the two hanger kits is the height of the hangers. With…

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Answer 4

It all depends on the spring being used, the shackles, and the equalizers among other things. There are some suggested hanger spacing measurements but really you would mock it all up first before permanently welding the hangers in place. For example,…

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Answer 5

When using the equalizer kit part #K71-359-00 with leaf springs that measure 25-1/4 inches long like the part #e28SR the hanger spacing you'd want to use is 29-1/2 inches.

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Answer 6

The hanger kit I recommend is part #APT3HD which includes front, center and rear hangers, equalizers and bolts. This kit is good for axles up to a 7K rating and most 3-inch diameter axles are rated for 6000 to 7200-lbs. The linked video will let you…

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Answer 7

For a tandem axle trailer using 25-1/4-inch double-eye springs like #e57SR and a 7-3/4-inch equalizer like #TREQE1 the hanger spacing should be approximately 29-1/2-inches. This is a starting point and you may need to adjust this dimension slightly.

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Answer 8

The suspension kit that would be the closest to what you have on your trailer would definitely be the Tandem-Axle Trailer Hanger Kit #APT9. The minor dimensional differences would not cause an issue. Since the equalizers would be 3/4 of an inch…

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Answer 9

The Dexter Heavy-Duty Suspension Kit for Tandem-Axle Trailers #K71-359-00 is ideal for 33" axle spacing but since the shackle straps are able to rotate they can be used for varying axle spacings that are near that 33" mark. The best thing…

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Answer 10

For a tandem axle trailer using 25-1/4-inch double-eye springs like #e57SR and a 7-3/4-inch equalizer like #TREQE1 the hanger spacing should be approximately 29-1/2-inches. This is a starting point and you may need to adjust this dimension slightly.

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Answer 11

Mobile home axle components can be hard to find replacement parts for, but if you have leaf springs part #e46SR the part #APT9 would be a great hanger kit to use. The distance on center between the spring hanger bolt holes for dual axle setups, with…

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Answer 12

The position of the axle should dictate the position of the springs and hangers not the other way around. With that being said, in order to determine proper placement of the hangers you will want to take the the distance between the two eye holes on…

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Tandem Axle Trailer Suspension Hanger Kit To Provide More Axle Clearance

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