They might just be very tight. Mine get that way occasionally. Other thing to look for is to make sure the cotter pin that locks the mechanism is in place. If not, it will just spin. I think it would be very unusual for them to be missing in one, let alone both. Your wrench is locked, right?
Jayco Designer 30 RKS Medallion pkg, Trail Air pin
'05 F350 6.0 PSD CC 4x4 DRW LB B&W Companion, Edge Insight
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