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Old 01-13-2015, 07:04 PM   #1
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Bought a Coupler Lock...now I need help

Purchased a coupler lock for this older 2" coupler
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Well the one that we purchased does'nt fit (would rather not say what I bought, no negatives)

Anyone with this coupler have advice on what may fit?


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Old 01-13-2015, 07:16 PM   #2
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I have a collection. That's what it took to get a fit. Use an RV catalog.
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Old 01-13-2015, 07:19 PM   #3
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Dave, Masterlock makes a lock that would probably fit this coupler. I use it on my boat. The locking portion fits over the lip at the front of the coupler. Remember, these things just keep honest people honest.
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Old 01-13-2015, 08:11 PM   #4
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Here's a link to the above mentioned coupler lock.

Master Lock 1-7/8" and 2" Trailer Coupler Lock - Stainless Steel Master Lock Locks 377DAT

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Old 01-13-2015, 08:16 PM   #5
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OLder version Master #35

The older version Master #35 fits the 1968 Marvel coupler for sure, I use one. There's one on eBay right now... $30 free shipping
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Old 01-13-2015, 08:49 PM   #6
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Originally Posted by ALUMINUMINUM View Post
The older version Master #35 fits the 1968 Marvel coupler for sure, I use one. There's one on eBay right now... $30 free shipping
Thanks, just bought it. Returning the one I bought previously tomorrow
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Old 01-13-2015, 09:21 PM   #7
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Won't a standard pad lock fit that one? I have been known to enlarge that hole slightly to make standard lock fit.

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Old 01-13-2015, 09:24 PM   #8
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Bought a Coupler Lock...now I need help

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Diversi-Tech Locks - DT25013
Fits most 1-7/8", 2" and 2-5/16" ball couplers
Works good on my Airstream

Ron


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Old 01-14-2015, 09:06 AM   #9
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DFlores, good choice.

The Master #35 has a nice smooth well fitted vintage appearance, that if painted same as coupler, may not be noticed. It's a good ol' USA made product from back when there was pride in manufacturing and the best materials were used. It wasn't made just to look like a coupler lock, it IS a coupler lock. It fits 2” or 2 5/16”.
Its Design is such that, unless you have all day and plenty of blades, it cannot be sawed off. Otherwise, you need an angle grinder, cold chisel, 5/8” diamond drill, slide hammer and 3/16” hex key, or maybe liquid nitrogen and an 8# sledge hammer could remove it.


A righteous product, it will slow or deter a casual amateur, or inadequately equipped thief from ball towing...
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Old 01-14-2015, 09:46 AM   #10
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I have used Master #35 for yrs. painted red. Last year when ready to to hook up couldn't find key had to call lock smith, he picked in 30 seconds, so they are not fool proof but I would not have any other kind.
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Old 01-14-2015, 10:32 AM   #11
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Yup, the Master-Lock key hole is indeed the Achilles’s Heel of this mechanism. I'd venture to say that the first-day class of “Lock Picking 101” is taught on Master-Locks.

Iris or thumbprint recognition retrofit??

I'm thinking to reset my tumbler pins to match the trailer's exterior access doors.

Why they are factory painted copper color is a mystery...
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Old 01-14-2015, 11:14 AM   #12
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Megahitch Lock Coupler Vault is another option. I won one at Alumafandango (Alumafandango trip – Day 6 | CasaRodante - Our House on Wheels). https://www.megahitchlock.com/products/
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Old 01-14-2015, 12:03 PM   #13
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Attachment 230392
Diversi-Tech Locks - DT25013
Fits most 1-7/8", 2" and 2-5/16" ball couplers
Works good on my Airstream

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This is the one I have and it works perfectly.
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Old 01-14-2015, 01:10 PM   #14
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I went with the MegaHitch lock after reading most of the posts on this forum about various locks. I ordered the silver one, and it is not too ugly, other than the red sticker on the side. It is all a crap shoot, but this gives me a bit of piece of mind.
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Old 01-14-2015, 02:41 PM   #15
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hitch lock

Sounds like you picked up a 2.5" ball; as far as I know all AS hitches are 2"; either that or you haven't pulled back the locking plate up inside your hitch; use some quality lubricant like WD40 and give it a good shot;
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Old 01-14-2015, 03:02 PM   #16
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Just before packing the coupler lock I purchased, thought I would try once more with a different screw and not screwed all the way in, and what do you know, it locks on. Talk about feeling stupid.

It hangs a little funny, but it locks. Did'nt want to try and pry it off with crow bar, so
I put a plastic bag over it, to keep it from catching water.

I think it is the cold that keeps me from working at this more, ....yea that's it. Blame the weather.
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Old 01-14-2015, 03:04 PM   #17
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I also got a MegaHitch lock after reading all of the reviews. Unfortunately it will just barely fit on my old Marvel coupler. I think the old Marvels must be thicker than the newer couplers. I had to extend the center bolt out to its maximum extent and then just hook the lock over the lip of the coupler. It doesn't seem all that secure. I considered contacting the manufacturer to see if they could make one a little bit taller, but haven't done so yet.
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Old 01-14-2015, 04:19 PM   #18
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Just before packing the coupler lock I purchased, thought I would try once more

I think it is the cold that keeps me from working at this more, ....yea that's it. Blame the weather.

Works for me every time.
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Old 01-14-2015, 04:31 PM   #19
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Originally Posted by casarodante View Post
Megahitch Lock Coupler Vault is another option. I won one at Alumafandango (Alumafandango trip – Day 6 | CasaRodante - Our House on Wheels). https://www.megahitchlock.com/products/

That's what I have and it works on any hitch. They need a torch; a sawsall won't cut it.

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Old 01-14-2015, 07:20 PM   #20
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OK, time to fess up.

The coupler lock that I originally purchased was a Mega Lock.

Gretchen, from Megahitch was more than helpful, she had a new smaller bolt modified for me and kept in communication the whole time that I was trying to figure this thing out.

Customer service like that not found everywhere.

Gretchen answered all my questions and was ready to accept the return of the Mega Lock.

I am not as stupid as this thread makes me sound, I am glad that there are people like Gretchen out there for my senior moments.
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