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Troubleshooting Masterlock Hitch Lock that Key Won't Insert Into  

Question:

My master hitch lock unlocking always wont with no problem. Now I can not get the key in to unlock it. What can I do to get the key in to unlock it ?

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Expert Reply:

Try directing WD40 into the keyhole using the straw that comes with it. Typically that frees up stuck tumblers and allows the key to insert and turn as needed.

expert reply by:
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Jameson C

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