Torque Specs for U-Bolts on 3,500 Pound Axles  

For U-bolts like #APUBR-1 the torque spec is between 45 and 75 ft-lbs. For the shackle bolts on the end of your leaf springs and a standard equalizer there are no listed torque specs. If you make them too tight they won't function properly.…

Torque specs for wheel lug nuts will vary depending on the diameter of the lugs, type of lug nut and the wheel's material. The linked chart details the recommended torque for many combinations. Dexter Hub/Drum #84546UC3 has 1/2-inch studs…

The torque requirements for leaf spring u-bolts depend on the diameter of the u-bolts that are being used. If the gross weight of your tandem axle trailer is 7,000 lbs, then you likely have two 3,500 lb axles. Typically 1/2 inch diameter u-bolts…

It looks like the hub is rubbing up against the trailer axle on your boat trailer. If I had to guess, I would say since that spindle is attached to the axle with U-bolts it probably shifted over time to a point where the hub is too close to the…

To use with the 4-Leaf Double-Eye Spring for 3,500 Pound Trailer Axles #SP-210275 I recommend the U-Bolt Kit #APUBR-1. The manufacturer doesn't list any specified torque specs for this kit but based on the size of the hardware (1/2 inch…

Hi Bobby; I have attached a help article below which explains how to replace trailer leaf springs in 5 steps. I also attached an installation video. Between the two you should be able to install the #DX55CR without any issues. Edit: I just double…

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.

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…

Yes, you can upgrade your current leaf springs with the higher rated 4,500 lb part #e27SR and you'll be fine. The suspension might be a little stiffer but you wouldn't have to worry about it going flat like what you have now.

M12-1.5 and 1/2"-20 threads are not going to be interchangeable. The diameter of an M12 thread is only going to be 0.4724" while 1/2" threads are going to be 0.500" in diameter. We currently only have…

You may be able to replace your existing axle that has an 84 inch hub face length with one that has an 89 inch hub face length without a problem but it's going to be dependent on your existing spring center length. This is the distance from…

The easiest way to accomplish this would be to start on one side of the trailer and get the springs in place before bolting the axle to the springs with the u-bolts. Have the axle up on jacks or blocks so its weight is not bearing on the springs.…