How to Fix Hitch Pin Lock that Stopped Allowing Key to Turn

Updated 03/09/2020 | Published 03/07/2020

Question:

My key will fit in the lock perfectly but won’t turn the lock. I’ve used WD40 on it several times but it still won’t turn. I just used the trailer a few weeks ago so I am sure I’m using the correct key and the lock really shouldn’t be stuck that quickly.

asked by: Macey

Expert Reply:

Most likely it's a stuck tumbler. Your best option would be to daily direct WD40 into the key hole with the straw and then insert and remove the key several times. Eventually the tumbler will release and the key will start working again. Otherwise it's faulty and would need to be replaced.

expert reply by: Jameson C