Too many Kubotas
Veteran Member
Do check the caster on the axles. It took me two sets of axles to figure out why the inner bearings would start turning on the spindles, spreading fine particles through the bearings in the process.Sure I agree bigger the better, but this 7000 lbs will be fine for what I need to haul and the price was right.
The trailer is very light, and rarely had more than 3,000 lbs. on it, which turned out to be part of the problem - there wasn't enough weight to make the slight bend in the axle tubing straighten out.
Combined with that I had set the springs to a certain ride height (adjustable spring hangers) especially the front axle ended up with negative caster, which in turn lead to toe-out. That removed the inward force on the inner bearing, making it turn on the spindle.
A different balance beam and moving the outer ends of the springs to the correct holes in the hangers created a slight positive caster on both axles (the third set), and they've been happy ever since.
Not saying that this couldn't apply to heavier axles with bent tubes, too, but I've never had any such issues with those.