How Tight Should Nuts of Trailer Suspension Shackle Bolts be Torqued To

Question

Question:

On a tandem axle utility trailer with 3500 lb axles, what should the leaf spring shackles be torqued to after replacing bushings?

asked by: Rick R

0

Expert Reply:

Shackle bolts don't typically have a specific torque value. They're usually tightened until the knurled portion of the bolt pulls completely into the shackle strap and the bolt head is ran all the way down to the shackle strap and you have at least 2 threads extending past the face of the nut.

expert reply by: Jameson C

0

Answer 1

Thank you for providing a photo of your trailer shackle straps showing the extra non-threaded portion of the Redline zerk-fitted bolts #126B2. Shackle bolts are intended to have a fairly loose fit with the shackle straps when installed properly. This…

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Answer 2

Like you said it depends on how much use the trailer gets. If you do not use it very often then it is not working as much and the grease will not break down as quickly. So you will want to grease it at least once a year. If you do use the trailer…

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Answer 3

Thank you for the photo. Based on that you can use either Shackle Bolt with Locknut #166081 or Wet Equalizer Bolt with Locknut and Grease Zerk #126B2. These are the exact same 3-5/16" bolt with 9/16" diameter and the only difference is that…

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Answer 4

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 5

To correctly measure a leaf spring, you'll want to jack the trailer up on jack stands so the axle is hanging freely, then measure directly across from the center of one spring eye to the other, as shown in the provided diagram. The height of the…

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Answer 6

I contacted MORryde and this does happen from time to time as the weight of the trailer can spread out the axles due to downward pressure on the springs/suspension. Odds are the 35" wheel base #MR27ZR will be the correct one for you, but they…

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Answer 7

For a single axle trailer, you want the shackle strap to be able to move so that you have the spring deflection needed for your suspension. Angled like the photo or even almost vertical is fine you just don't want the shackle strap to bind and…

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Answer 8

To find the load capacity for your axle you should look on the trailer VIN plate or sticker that lists the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that…

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Answer 9

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 10

Well shackle length is mainly based on the height difference between the front and rear hangers. The rear hanger normally doesn't hang as low as the front so that the shackle can offset the difference and add the ability to move. What is the…

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Answer 11

Personally Russ, if you are planning to keep your 2018 Grand Design Momentum 351M toy hauler and want to benefit from a better ride then upgrading to the Roadmaster Comfort Ride Leaf Spring Suspension Kit #RM-2460-2570 makes the most sense. If you…

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Answer 12

Yes, our Dexter leaf spring part #DX74XR is the same as the part number 072-079-00. This is a 7-leaf spring for an 8,000 lb trailer axle that is 24-7/8 inches.

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How Tight Should Nuts of Trailer Suspension Shackle Bolts be Torqued To

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