Although extremely important, U-bolts may be one of the most overlooked components of the leaf spring suspension system. These invaluable pieces of the suspension can mean the difference between a well functioning system and failure that can lead to damage of the leaf springs they hold.
Do you have to replace U-Bolts on leaf springs?
One reason is if you are making repairs or changes to your leaf springs or axles. If you need to remove your original U-bolts for any reason, then you must replace them with new ones. This is because their threads are rolled instead of cut like traditional bolts.
What is the main function of U bolt in leaf springs?
U-bolts are common bolts that are used for building construction and/or vehicle suspension like leaf springs. Considered one of the major parts of your leaf spring installation, u-bolts will provide a permanent tie between the spring leaves and your axle.
What do U-Bolts do suspension?
U-Bolts are a crucial part to your truck’s suspension. These bolts keep the leaf springs of your suspension tied together. Without these, your truck’s suspension wouldn’t exist.
How tight should leaf spring U-Bolts be?
Tighten all U-Bolts until they are snug only. Tighten in the sequence shown to approximately 1/3 of recommended torque.
Is it safe to reuse U-bolts on leaf springs?
Why can’t I reuse my U-bolts? This is one of the single most commonly asked questions out there when discussing leaf springs and related components. We get a variety of reactions when we advise our customers that reusing U-bolts is never a good idea.
Why are U-bolts so expensive?
Ever wonder why fasteners like nuts and bolts are so expensive? You would think something so standard and manufactured in such high volumes would be cheap, but in most places, they’re actually pretty expensive. … They are manufactured in automated factories where they are pumped out by the ton.
What should U-bolts be torqued to?
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.
Why do U-bolts break?
Fatigue failure happens when the bolts have not been tightened properly, or have loosened up during its service life. If enough force is acting on the loosened joint during use of the product, bending stresses can weaken the fastener, eventually causing it to fail.
How much weight can U-bolts hold?
How Much Weight Can An Eye Bolt Hold?
|Shank Diameter (in)||Weight Capacity (lbs)|
When should the U-bolts on a spring suspension be re torqued after installation?
Also, TMC recommends running the truck on a course where maximum articulation of the suspension occurs after installation, then loading the suspension before retorqueing the U-bolts. They should be retorqued again between 3,000 and 5,000 miles after replacement.
What do U-bolts do?
A U-bolt is a bolt in the shape of the letter U with screw threads on both ends. U-bolts have primarily been used to support pipework, pipes through which fluids and gasses pass. As such, U-bolts were measured using pipe-work engineering speak. … U-bolts are also used to hold ropes together.
How do you tighten U-bolts on leaf springs?
Place the new U-bolt around the leaf spring. Connect the two portions of the “U” with two nuts. Use a torque wrench for the installation. Tighten them in a cross pattern, gradually bumping up the torque.
Can you over tighten leaf spring bolts?
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 and tighten them until they are snug and then backed off 1/4 turn.
How do you keep leaf springs from shifting?
Proper way to do it would be to take off the leafs, pull them apart, grind down any ridges made by friction, paint them, slip plate them, and put them back in with new bushings. Make sure your spring clamps are tight enough on the sides, but not so much that they wear into the spring (or viceversa).