What Torque Should Be Used For U-Bolt Nuts On Trailer Suspension

Question

Question:

Hello, I am changing the leaf springs on my boat trailer. When I tighten down the u-bolts, is there a foot pound number I should tighten them down to?

asked by: Lenny B

1

Helpful Expert Reply:

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.

expert reply by: Jeffrey L

1

Answer 1

The torque spec for the rear U bolts on your 2019 F53 motorhome are dependent on the size. If you have 3/4 x 16 u bolts (and used a 1 1/8" socket to remove the nuts) then they torque to 250 lb-ft. If the u bolts are 7/8 x 14 (and you used a…

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Answer 2

The MORryde Suspension Upgrade Kit #MR58ZR uses the Flange Lock Nut #006-092-01.

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Answer 3

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 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

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…

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Answer 6

I have attached for you below all the parts you requested for your 2019 Grand Design Reflections 303RLS. 5-Leaf Double-Eye Spring part #e34SR MORryde Suspension Upgrade Kit for Tandem Axle Trailers part #MR46ZR MORryde Shock Absorbing Suspension…

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Answer 7

For a standard replacement equalizer for your Dexter 13-122 equalizers you'd want the #TREQE1 or for a cushioned version you'd want the part #K71-653-00 which comes with new shackles and bolts. For a kit that includes new bolts, bushings, and…

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Answer 8

No, that is not completely true. The wet bolts can be re-used as long as they are not rusted, cracked or damaged in any other way, to include the splines or threads being damaged. The main thing that you'd want to replace is the lock-nut which…

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Answer 9

The correct torque spec for trailer suspension u-bolts will depend on the the diameter of the bolt. You will want to use the following depending on bolt size: 1/2" bolts: 45 ft/lbs - 70 ft/lbs 9/16" bolts: 65 ft/lbs - 95 ft/lbs 5/8"…

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Answer 10

You will need a lock nut, though the ones you mentioned are not, we do have the correct lock nut for the Step Bolt For Double Eye Springs - 9/16" Diameter - Plain - 3" Long #ABS34FR: - Fastenal Lock Nut - Zinc Plated Steel - 7/16"-20…

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Answer 11

Every 3,500lb Dexter axle we sell has a diameter of 2-3/8" and typically uses a 5-1/2" U-bolt, such as U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts #APUBR-1. You may have a 5,200lb Dexter axle, which has…

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Answer 12

Thank you for all of the very helpful information Kevin. Let me start by saying the amount of leafs isn't as important as the capacity the actual spring is rated for. We have single leaf springs that are rated higher than some 4 leaf springs so…

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What Torque Should Be Used For U-Bolt Nuts On Trailer Suspension

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