DUDLEY LOCK CRACK METHOD

[unlisted]

They changed the locks a while back, this method no longer works on them. You need an old lock for it to work.

[thelockpickkid]

Exactly, this method won't work, but I still have another method!

[ChainChomp]

All the sticky spots were the same range for me, I have a Dudley combo lock with an 'A' on the back (it's silver with a black knob). I found it in a locker room, already locked.

However, I did crack it using a (semi) brute force method in only 20 minutes.

1) Pull the latch up with the dial near 2, it should be able to move slightly over a range of 3-5 numbers. Write this range down. Repeat to find 10 ranges, if the dial is stuck when you pull the latch out you're not in a range.
Mine were:
0-3
6-9
12-15
18-21
24-27
30-33
36-39
42-45
48-51
54-57

2) For each range, write down a number that is near the middle of each range. For me, I got: 2,8,14,20,26,32,38,44,50,56. This part should only take a minute or two.
These are the ten locations that must be brute forced.

3) There are a total of 90 combinations that need to be checked (since you can't have the same number twice). Start with 56-2 (use your numbers): dial in the first two numbers, then proceed to each of your numbers you wrote down. Eg. 56, then 2 (go past it once), then your numbers: 8,14,20..56 and pull the latch at each stop.

Then do 56-8: 14,20,26...2
etc.
The whole set of combos starting with 56 only takes about 4-5 minutes to do. And that's 10% of all of them!



I recommend starting at the high numbers (56,50,44,38) for the first number, as I heard the second number is usually smaller than the first. Or, if there are suspicious numbers that seem to sound/feel different, start with those.

You have a 50%+ chance to crack the lock by checking 5 first numbers (= 45 combinations of the first two numbers) which takes me about 25 minutes at a leisurely pace. You are guaranteed to crack it in 50 (40 or 30 if you're intense) minutes if you don't screw up.

[mlepatron]

I tried Stas' method from page 3 and 4 of this thread and they work. I had to read the post at LEAST 15 times to be able to visualize (as a noob) what was going on, but now I get it and it totally works. I have been trying other methods on this lock for months and finally came back to this method for Dudley locks and it totally works.

My lock is a Dudley, silver face with blue dial and "A" stamped on the back. Final combo was 12-57-12 (plus or minus a few digits on each). This particular lock goes against the "norm" for Dudley locks where the middle number us usually the smallest. Not mine.

Kudos Stas!!! You rock!

[crimpoff]

I have a silver Dudley with black knob bought in mid 90'S. There is a "B" marked at the back.

I tried the method described at the beginning of this topic and it worked first time!!!

I had to pull quite hard while forcing the knob to rotate to find sticky point. I noticed that when I keep a little tension while shifting from one sticky point to an other there is 2 places where the latch is moving with an unusual "click". Number where 22-25 and 52-55. It popped open with 54-24-48.

Thanks for this method, now I can reuse my old Dudley!!!

[crimpoff]

I have a silver Dudley with black knob bought in mid 90'S. There is a "B" marked at the back.

I tried the method described at the beginning of this topic and it worked first time!!!

I had to pull quite hard while forcing the knob to rotate to find sticky point. I noticed that when I keep a little tension while shifting from one sticky point to an other there is 2 places where the latch is moving with an unusual "click". Number where 22-25 and 52-55. It popped open with 54-24-48.

Thanks for this method, now I can reuse my old Dudley!!!

I tried many other time to duplicate the method with an other Dudley without any success. It seems I had beginner's luck

I took the Padlock apart to understand the inner working of it. You can see the complete break down here: viewtopic.php?f=3&t=6423&start=345

Cheers

[stacephobia]

I have tried it out, it seems to have not worked for me
I have one of the blue A locks, my numbers are

1-4
5-7
8-10
11-13
14-17
18-20
21-23
25-27
28-30
31-33
34-36
39-0

it has not worked. i just don't understand how you do not have to know the last last number. with the two dudley locks i have in front of me you can not turn the dial if there is full tension on the loop. so how do u know where the third place is to open it?

Thanks
Stacie

[mja]

Thank you! I have a 'B' Dudley and I tried the method in the first post.
I had 10 points of 'stickiness' and 6 of them were 3 apart and 4 of them were 4 apart.
I took the 4 that were 4 apart and made 6 combinations of sets of two, and added 2 and subtracted 2 to get possible combinations to try, and I started working through them putting the lower number as the second number.
5-9 17-21 gives 23,3 and 15, 11
5-9 41-45 gives 47,3 and 39,11
5-9 59-33 gives 5,3 and 57,11
17-21 41-45 gives 47,15 and 39,23
17-21 59-3 gives 15,5 and 57,23
41-45 59-3 gives 39,5 and 57,47
On the 9th set, (15,5) suddenly the lock popped open around 31!
It was a little stiff, so I tried (15,6,30-33) but it didn't open, so I tried (15,3,30) and that was perfect.
I have a few Dudleys inherited from my kids, so I am excited to crack them all now.