Installation and Operation of the MasterLock Coupler Lock # 377DAT

Question:

hi i recently bought your trailer lock #377dat. i was curious i can put the lock on but only if the trailer latch is in the up position is this ok or should i go to a smaller lock in order to keep the trailer latch in the down or lock position any feedback is greatly appreciated.

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Expert Reply:

To install this Master Lock Coupler Lock # 377DAT onto your coupler you will need to have your coupler in the unlocked position so that the ball portion of the lock can slide up in to the coupler. Once slid on you will push the shackle back and it is locked. It is perfectly normal that your coupler has to be put into the unlocked position before it will accept the # 377DAT.

As long as you have a coupler that has is designed for a 1-7/8 inch or 2 inch ball and it has a lip around the edge of the coupler this lock should work well for you.

Check out the review video of this product that I attached also.

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Jameson C

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