Troubleshooting MasterLock Coupler Lock Where Key Seems Stuck
Question:
Having problem key won’t turn to
asked by: Harvey D
0
Expert Reply:
Try shooting some WD40 with a straw into the key slot of the Master Lock Trailer Coupler Lock # ML389DAT to see if you can get it to free up stuck tumblers. Most likely that will fix the issue but if not let me know!
expert reply by:
Jameson C
0
Product Page this Question was Asked From
Master Lock Trailer Coupler Lock - 1-7/8", 2" and 2-5/16" Ball Couplers
- Trailer Tongue Lock
- Surround Lock
- Universal Application Lock
- Keyed Unique
- Fits 1-7/8 Inch Ball
- Fits 2 Inch Ball
- Fits 2-5/16 Inch Ball
- Master Lock
more information >
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Todd H.
7/6/2020
Hi Jameson, I tried a graphite lock unstick product, but the key still won't turn. Any suggestions other than drilling the lock?