Recommendation for Adding Third Axle To Trailer Suspension

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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

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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

0

click to enlarge

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

The Dexter Heavy Duty Suspension Kit #K71-360-00 is designed for 33" axle spacing. Since your current spacing is 34" this kit should fit just fine with your current hanger spacing. I have attached a picture showing what this kit should look…

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Answer 3

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 4

On each individual electric brake magnet the amperage draw would be 3.0 to 3.2 max amps at 12 to 13 volts on 7-inch brake magnets and 3.2 to 4.0 max amps at 12 to 13 volts on 10 and 12-inch brake magnets. The max amperage draw for the brake magnets…

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Answer 5

Hello Randall, that is a good question. To sum it up, the equalizer allows both axles of a tandem or triple axle setup to bear the full weight of the trailer equally, hence the name. Lets say you had a tandem axle trailer with two independently…

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Answer 6

Hi Benito, Even though it's super close that 3/4" difference can cause issues since the spring seats must line up with the hangers welded to the frame rails. We do offer the Trailer Axle Beam with Easy Grease Spindles #e88GR which has a 7k…

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Answer 7

Hello Greg. Generally, yes, shackles are required for any single axle utility trailer. The diagram below will show you the components of a typical single axle setup. You will have shackles on the rear hangers only. This is because as your axle hits…

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Answer 8

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 9

The 052-003-00 number on your current shock is the part number from Dexter Axle. We don't carry the direct replacement but if the specs match for the Lippert Standard Replacement Shock #LC283271 and the axle this is being applied to is a…

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Answer 10

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 11

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 12

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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Recommendation for Adding Third Axle To Trailer Suspension

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