How tight should axle bolts be?
Tighten all U-Bolts until they are snug only. Tighten in the sequence shown to approximately 1/3 of recommended torque.
How tight should spring shackle bolts be?
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 and the whole suspension system will bind and cause problems.
How much do I torque leaf springs?
A 1/2 inch diameter bolts should be torqued between 45 ft/lbs and 70 ft/lbs. A 9/16 inch diameter bolt should be torqued between 65 ft/lbs and 95 ft/lbs and a 5/8 inch diameter bolt should be torqued between 100 ft/lbs and 120 ft/lbs.
How to install u bolts?
How to Install a U-Bolt
- Step 1: Remove the Nuts. The U-bolt will probably come with nuts attached to its threads.
- Step 2: Position the U-Bolt. Place the U-bolt around the object you’re attaching to the beam or support.
- Step 3: Examine Your Holes.
- Step 4: Thread the Bolt Through.
- Step 5: Fasten the Nuts.
What happens if you over tighten U-bolts?
When this happens, the threads are actually cut and grooved by the nut as the nut is tightened around them. This means that if the nut is loosened back up or if it is retightened again, it is going to damage the threads on both the bolt and the nut. This creates an opportunity for the U-bolt to loosen up over time.
What happens if you over tighten U bolts?
Why would u bolts have to be tightened correctly?
centre bolts hold the spring together for assembly and help locate the spring onto the axle in the correct position. Correctly tightened ubolts are what holds the springs firmly in place on the vehicle when driving. Most times just supplying the vehicle make, model and year will be enough.
Do you have to replace U-bolts on leaf springs?
U-bolts are a vital part of your suspension system and should never be reused. Failure to replace or properly fit your U-bolts when maintaining or servicing your suspension could cause premature failure of your leaf springs or other components with catastrophic results.
Is it OK to reuse axle U-bolts?
While the U-bolt has some flexibility in its ability to stretch after being loosened, the bolt will never tighten enough to allow it to regain its full torque spec potential. The next issue with trying to reuse U-bolts has to do with the threads themselves. When being tightened, the threads stretch out under torque.
Do you need a torque rating for shackle bolts?
The shackle bolts 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.
How much torque does a you bolt nut have?
Spring Axle Torque Specifications Bolt Type Axle Capacity Torque 3/8″ U-Bolt Nuts 2K 35 ft-lbs 1/2″ U-Bolt Nuts 3.5K 50 ft-lbs 9/16″ U-Bolt Nuts 5.2K 65 ft-lbs 9/16″ U-Bolt Nuts 6K-8K 90 ft-lbs Spring Eye, Equalizer and Shackle Nuts All Double Eye 30-50 ft-lbs Spring Eye, Equalizer and Shackle Nuts All Slipper Snug nut only
How much torque does a 16K axle have?
Trailer Axle (8K-16K) Owner’s Manual Wheel Torque Specifications Wheel Size Stud Size Torque Sequence 1st Stage 2nd Stage 3rd Stage 16” Dual and 17.5” Cone Nut 5/8″ 50-60 ft-lbs 100-120 ft-lbs 190-210 ft-lbs 16” Dual and 17.5” Flange Nut 5/8″ 50-60 ft-lbs 150-200 ft-lbs 275-325 ft-lbs
How big is a U-bolt for an axle?
Typically 1/2 inch diameter u-bolts are used with leaf springs for 3,500 lb axles and they have a torque rating of 45 ft/lbs to 70 ft/lbs.