Recommendation for Adding Third Axle To Trailer Suspension

Question

Question:

I’m not really new at this,this is the third time I’ve done a triple axel change over but the first time for 35 inch spacing. the correct spacing for the hanger spacing is 30 1/2 x 35 back to 30 1/2 using a kit number K 71 453 not the 360 information was hard to fine but this is the correct setting

asked by: Larry B

0

Expert Reply:

The Dexter Heavy Duty Suspension Kit # K71-360-00 is designed for 33 inch axle spacing. To add your third axle, you cannot simply add a hanger spring and axle. You can keep your 35 inch spacing but you will need to relocate your hangers. I've attached an article to help with the proper positioning of your axles.

You will need to add another equalizer of the same dimension as you have to each side and then add the same leaf springs and shackle straps as what you currently have. You will use the same hanger as your front hanger for your rear hanger. Without knowing what you have, it would be really difficult to duplicate. You may want to consider just using a kit like the Triple-Axle Trailer Hanger Kit for Double-Eye Springs - 3-1/4" Front/Rear/Center # APTT5 and the difference in your spring length will account for the difference.

For your leaf springs, you can use the 6-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 26" Long # e94SR.

I've attached the 5,200 lb axle options we carry to assist with the hub face to hub face length and the spring seat to spring seat measurement on center.

expert reply by: Jason S

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Larry

6/11/2018

I’m not really new at this,this is the third time I’ve done a triple axel change over but the first time for 35 inch spacing. the correct spacing for the hanger spacing is 30 1/2 x 35 back to 30 1/2 using a kit number K 71 453 not the 360 information was hard to fine but this is the correct setting

Jason S.

6/11/2018

It is good to hear that you aren't new to this as this is a little bit of an undertaking. When using the Dexter Heavy Duty Suspension Kit # K71-360-00, you would want to space your hangers out and mock it up. The way I see it, you are wanting 35 inches at the center, but I get 31-1/8 inches on center on either end. I get this by starting with the 35 inches of your axle spacing which will make that center section the same 35 inches. Then you subtract 1/2 of once equalizer and 1/2 of the other which is 7-3/4 inches. Then subtract 26 inches on center for your leaf spring, and you will get 1.25 inches which is great for the 2.25 inch on center shackle. So when you move to the front and rear hangers you then add that same 1.25 inches for the shackle to match, add 1/2 the equalizer, and the 26 inch spring which puts you at 31-1/8 inches. I've attached the diagram to help. Let me know if you have further thoughts.

Answer 1

Hello Mike, Thank you so much for the detailed information, most helpful! For the leaf springs, you will want to go with (6) of the 6-Leaf Double-Eye Spring for 7,000-lb Trailer Axles - 24-7/8" Long #e64SR. Since you have 7K axles, these are the…

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Answer 2

Hey Bekzod, So while we don't have a way of knowing the exact leaf springs for your Arctic Wolf 5th wheel trailer, I can help you determine the correct replacements. You do have to take a measurement, though it's pretty easy, as all you need…

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Answer 3

Despite what the manufacturers of these equalizers say, the axle/wheel spacing isn't the right way to figure out the best fit for upgraded equalizers, including the MORryde CRE3000. The wheel spacing is more of a guideline, so to determine the…

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Answer 4

Hey Mark, I looked up the specs of the spring you have now and found that it is a 24-3/4 inch long spring from eye center to eye center and for a 7k axle. So that means that the replacement spring part #EM28AJ that you referenced will work great as a…

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Answer 5

Hey Kenny you can upgrade your leaf springs to a higher rated 4k spring like the 7-Leaf Double-Eye Spring for 8,000-lb Trailer Axles #DX74XR. I'm just going to need to know what your current spring measures from center eye to eye, as well as the…

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Answer 6

Hey Kyle, this is a great question but the difference is the bolt length for the ones that connect to the hangers because the Correct Track brackets add thickness. You can see the difference in the two pictures I attached. Note how much more bolt is…

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Answer 7

We have one double-eye leaf spring that has a 7,000 lb axle rating. For that you would want the part #e64SR. The hanger kit you would need then to go with that is the Dexter Heavy Duty kit part #K71-360-00. The axle spacing will be 33 inches which is…

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Answer 8

On equalizer 013-105-04 in kit #K71-360-00 the eye center to eye center measurement is approximately 7-1/2 inches.

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Answer 9

It sounds like the Replacement Shackle Link with Bolts #018-026-05 that you referenced is what you are needing. It comes with the shackle and wet bolts that have a grease zerk fitting installed on them. This kit is compatible with the following heavy…

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Answer 10

It is very possible that the Dexter Heavy Duty Suspension Kit #K71-360-00 you were looking at will fit your 2008 Heartland RV Cyclone 5th Wheel Triple Axle Toy Hauler, but to confirm this you will want to measure the length of your existing…

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Answer 11

You are right on. Since you have 33" axle spacing and 6000lb axles on your triple axle toy hauler I recommend the Dexter Heavy Duty Suspension Kit #K71-360-00 as it was designed to work with trip axle trailers with 33" axle spacing and…

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Answer 12

Thank you for all of that excellent information and photos! To replace the front equalizer you need the Curved Equalizer #TREQ104 and then for the rear equalizer you need the Equalizer for 1-3/4" Wide Double-Eye Springs #TREQ105. To replace your…

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