[Fr. Frank]

Most Continental trailers are shipped wheels-off. They stack them one upon the other, then the dealer assembles the wheel to the hubs.

Here's some good advice: NEVER ASSUME THE PERSON PUTTING YOUR BOAT ON THE TRAILER AND ADJUSTING SAME KNOWS WHAT HE'S DOING!

Check everything! .
Make sure the axle u-bolts nuts, bunk nuts, spring hangers, etc. are tightened by checking them yourselves. Any bolt or nut you ever plan to remove for any reason whatsoever MUST have grease on the threads. That means you gotta grease them yourselves.
And if you check that BEFORE you ever pull out of the dealer's parking lot, you're being smart.

In an in-out storage marina, the kid on the dock or running the forklift is probably untrained and making less than $15 hour, and in the case of dockhands, probably making about minimum wage. Check things accordingly.

Take it from an old marina manager. Assume three things were done improperly, and then check carefully 'till you find 'em.