How Tight Should Shackle Strap Bolts Be

Question

Question:

what is the torque on these?

asked by: Mike

0

Expert Reply:

The shackle bolts used between the springs and hangers do not require a specific torque rating because tightening the shackle bolts too much will squeeze the shackle straps against the leaf springs, and the whole suspension system will bind and cause problems. The best thing to do when tightening down shackle bolts is to use lock nuts, tighten them until they are snug, then back them off 1/4 turn. Lock nuts should be used because they resist loosening with vibration or torque.

The part # K71-358-00 comes with lock nuts.

expert reply by: Jameson C

0

Answer 1

All of the tandem axle hanger kits for double-eye springs use 2-5/8 inch or 2-1/4 inch long shackle straps. The length is taken from the center of one eye to the center of the other eye. The overall length of a 2-5/8 model is just under 3-1/2…

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Answer 2

I have a couple options for you. First our closest axle to what you have is the CE Smith Trailer Axle #CE33201GA which has a hub face to hub face measurement of 57-1/2" so it will make the trailer wider. For leaf springs the 4-Leaf…

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Answer 3

I went out to our warehouse and measured the Dexter Heavy Duty Suspension Upgrade Kit for Single Axle Trailers part #K71-358-00 for you. The dimension for the shackle kit are as follows: The distance between the top and bottom steel brackets is…

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Answer 4

Trailer manufacturers don't usually keep a record of parts like these that they install at the factory, so I cannot be sure as to the exact length of the shackle strap that would have come originally on your trailer. With this in mind, a 3-1/8…

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Answer 5

It is not uncommon for a trailer to lean to one side even from the factory as heavier appliances can be on the same side or there could be multiple slides on that side. In order to try and combat this issue there are options from SumoSprings and…

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Answer 6

The Road Armor Shock Absorbing Equalizer Kit part #LC696740 are taller than most other standard equalizers so you'll likely need the longer 3-1/8" shackle straps when using them, the Lippert AP Kit part #LC52SV is a go-to for this as it has…

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Answer 7

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 8

For 1/2 inch trailer u-bolts that attach to axle the recommended torque value is between 45 and 70 ft lbs of torque.

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Answer 9

What is the length of your leaf springs? Typically you put the hangers about 1/4 of an inch narrower than the length of the leaf springs from eye to eye when they are unloaded.

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Answer 10

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 11

The threaded portion of the bolts of the #K71-403-00 are 7/16 inch but the stepped up diameter is 9/16 inch. The shackle length is 3-1/8 inch from hole center to hole center. The bolt length is 2-7/8 inches. We can't help much with the axle…

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Answer 12

If the shackles are flipping the wrong direction frequently that typically means the leaf springs are too short, the hanger spacing is too big, or the shackles are too short. Most of the time it's somebody changed leaf springs and just went with…

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