What is the Torque Rating for 9/16 Inch Trailer Suspension Bolts

Question

Question:

I purchased new leaf springs, equaflex equalizer, u bolts, shackle straps, bolts, etc. for my tandem axle trailer. What is the torque lbs on the 9/16 wet bolts suggested for the equalizer and the straight bolts suggested for the spring eyes with never fail bushings

asked by: Curt

0

Expert Reply:

For 9/16 inch suspension bolts, wet bolts or regular bolts, you will want to torque them to 65 to 95 foot pounds.

And should you ever use 1/2 inch bolts then the torque spec is 45 to 70 foot pounds. And for 5/8 inch use 100 to 120 foot pounds.

expert reply by: Michael H

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Answer 1

Hello Justin, Looks like you were right on the money. I am showing with that information that it is a 3,500 pound axle so you will need the Hub Bearing Kit for Lippert, Dexter, and AL-KO Axles - 3,500 lb with #84 Spindle #BK2-100. Getting things…

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Answer 2

The #84 spindle is just a common way to identify the spindle dimensions typically used for 3,500 lb axles. So instead of listing out the parts, people can just say they have #84 spindles and it's easier to know what fits it. The CE Smith Trailer…

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Answer 3

Yes the 4,000-lb leaf spring is compatible with a 3,500-lb axle. There are a couple of important measurements. Spacing from eye to eye on the spring when unloaded with no weight on the axle. Inner eye diameter of the spring roll Spring width from…

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Answer 4

For 3,500 pound axle U-bolt kits like the Redline #APUBR-1 that use 1/2 inch hex nuts you will want to torque them down somewhere between 45 and 70 foot pounds. I have attached a great article on trailer suspension that includes this info along with…

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Answer 5

It sounds like you're asking about the torque spec for the castle nut on your 3,500 lb axle. There is no specific torque rating when installing the castle nut on any axle. You want to run the nut down until there is no side to side play in the…

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Answer 6

Yes, you could use leaf springs for a 4,000 lb axle, like part #e57SR (rated for 2,000 lbs each), with a 3,500 lb axle but it will make your ride a bit more stiff. The only times that a leaf spring would become damaged is if it is overloaded or has a…

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Answer 7

I have attached for you below some common torque values needed for a trailer suspension system but a lot of these will vary by bolt size and other factors. U-Bolts: Varies by Size - 1/2" bolts: 45 ft/lbs - 70 ft/lbs, 9/16" bolts: 65 ft/lbs…

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Answer 8

If the U-bolts are 9/16 inch diameter, the torque specs should be between 65 to 95 foot lbs. If the U-bolts are 3/8 inch diameter, the torque should be between 30 and 50 foot lbs.

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Answer 9

According to the installation instructions from Dexter Axle the torque specs for the wet bolts on their Dexter E-Z Flex Suspension Kits, like part #K71-653-00, is 30 - 50 ft-lbs. I have attached a clip from their instructions for you to check out.

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Answer 10

Hey Steven, I was able to find out that the center cap part number you mentioned is for a 3.75 inch diameter wheel pilot hole so for a suitable replacement we carry the #KE95JV which would work great. Did yours break or did they fall off?

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Answer 11

The torque requirements for leaf spring u-bolts depend on the diameter of the u-bolts that are being used. If the gross weight of your tandem axle trailer is 7,000 lbs, then you likely have two 3,500 lb axles. Typically 1/2 inch diameter u-bolts are…

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Answer 12

There should be enough free play in the shackles to allow them to move. There is no specific torque rating for shackle bolts. The first thing you should make sure of is that the bolts you use are long enough so that when installed you will have at…

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What is the Torque Rating for 9/16 Inch Trailer Suspension Bolts

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