What is the Torque Rating for 1/2 Inch U-Bolts for Leaf Spring Trailer Suspension

Question

Question:

What would I torque the nuts to on half inch u bolt ?

asked by: Roger P

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Expert Reply:

The torque rating for 1/2 inch u-bolts in U-Bolt Kit, # APUBR-1, is a minimum of 45 ft lbs and a maximum of 70 ft lbs.

expert reply by: John H

0

Answer 1

You will torque them between 45 and 70 ft lbs and use a 19 millimeter 3/4 inch socket to tighten the nuts of the U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts #APUBR-1. I have added a link to a short video…

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Answer 2

Since suspension components use lock nuts on the ends of the shackle bolts and the bolts need to be able to allow movement you actually don't want to torque down the bolts at all. You want to snug them up so that there's no lateral…

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Answer 3

The torque rating for the 1/2 inch diameter u-bolts in the U-Bolt Kit #APUBR-1 is a minimum of 45 ft lbs and a maximum of 70 ft lbs. These are designed to mount your trailer's leaf springs to round, 2-3/8 inch diameter axles. The U-bolts,…

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Answer 4

You will need to have the spring seats removed to have them or new spring seats welded to your axle at the correct locations to match your trailer's hanger spacing. For a 3-inch round axle rated between 5200- and 7200-lbs use part #TRSS300;…

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Answer 5

The torque of U-bolts for 3,500 lb axles such as the 95" long Dexter Trailer Axle Beam #7359765 or 89" long Dexter Trailer Axle Beam #T3584F-EZ-8974 depends on the diameter of the U-bolts. I have cut out a part of our help article on…

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Answer 6

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 7

There is no specific torque rating for shackle bolts. You'll want to ensure that the bolts you use are long enough so that when installed you will have at least 2 threads protruding from the nut. Make sure that the bolt you're using has a…

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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

There is no specific torque rating for shackle bolts. Basically for the middle bolt there should be enough free play in the shackles to allow them to move. Tightening the shackle bolts too much will squeeze the shackle straps against the leaf springs…

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Answer 10

You may be able to reuse the same shackle bolts provided that they are the correct size, are not severely rusted, and are not cracked or otherwise damaged, but not the lock nuts. If you think your bolts might be rusted, cracked, or damaged I would…

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Answer 11

There are two different sized wet bolts used for the MORryde Suspension Upgrade Kits with 2.25" shackles. (1) of the wet bolts is 9/16" Diameter x 3-3/8" long and (1) of the wet bolts is 9/16" Diameter x 2-7/8" long. If you…

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Answer 12

For a 3500-lb axle, it's most likely a 2-3/8" diameter so you can use the U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts #APUBR-1. If this is a boat trailer or utility trailer that might be sitting outside a…

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What is the Torque Rating for 1/2 Inch U-Bolts for Leaf Spring Trailer Suspension

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