It always concerned me that the hitch was locked and in place. One thing I always do is pull forward a couple times with the trailer brakes full on to put pressure on the locking jaws. I also back up a couple times to put pressure full on the back of the jaws as well. This all with the front pads only a couple inches off the ground in case she unlocks. A good coat of lubricant in all the right places is a must as well. The link to the owner's manual is really important. There are lots of things to check on the 5th wheel hitching process and the manual is a must until you get familiar with your hitch.
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