Should be no problem to let it sit on ground. Bearings will hold up to that. I do know that some put a jackstand under the frame to take the weight off. Never did that in 32 years.
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Mark & Susan
Lehighton, Pennsylvania
EAGLE HT FIFTH WHEEL | 30.5CKTS - '13 Ford F150 SCREW - PullRite Superslide - Roadmaster Active Suspension Member - "Northeast Adventures RV Rally Group" & "Mason-Dixon Bunch"