We lost ours somewhere on Route 66 between Las Vegas, NM and Holbrook, AZ.
It also took the hub cap with it.
I'd never seen the EZ lube caps as the hub caps always covered the hubs.
Not sure how many miles we drove before I noticed the hub cap missing, but probably put another 300 miles on the trailer before the wheel bearing burned up.
Not being the most mechanical person in the world, I didn't know anything was missing.
Which is why I was upset at the service manager at the Flagstaff, AZ Camping World, who came outside and looked directly at the hub, and sold me the $15 hub cap, but failed to mention that I was about to loose a wheel bearing.
And that was the beginning of the end for that Trail Runner for us . . .
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On a new trailer, the manual warns, and there's usually a sticker warning that the lugnuts need to be tightened after
25/50/200 miles. Looks like a missing cap would have been obvious when the hubcap was removed to expose the lugnuts.
If you didn't tighten the lugnuts, you might need to check on whether things are loose and whether you've got any damaged threads on the lugnuts or studs.
When you purchase a Heartland trailer here in Colorado, it should already have 1300 miles on it.
Wouldn't/shouldn't the delivery driver or dealership take care of tightening the lug nuts?
I had the Trail Runner tires balanced a few days after we bought it, and our Prowler, as you know, I had the tires swapped out and balanced before we took possession of it.