Back in highschool my brother figured out these locks, i'm sure there are other ways to do this, but here's how the newer (the little red arrow is indented, not sticking out) master combo locks work:
there are 12 gates, and of course we all know 1 of them is the last number... so put tension on and find the gates, there are two types;
1) A double digit gate: where the dial will turn and hit 2 numbers I.e. stopping so it hits 3 and 4 and just bounces back and forth
2) a middle digit gate: this is where it stops with a digit in the center and bounces between half of one number, over one, and half past that one.
I.e. stops on 3 and a half, crosses 4 and stops again on 4 and a half.
double digit gates... ignore them, they are useless. So find all the middle digit gates and note the whole number they all have, it's different for each lock but there is always a set that ends in the same number... so for one of my locks the middle digit gates are: 8, 18, 28, 38 and 35
Most of you have figured it out by now, the one that breaks the ending in the same digit pattern is your last number, and now you use this chart to find the first and second numbers. Also note that from the list of possible first and second numbers, if your last number is odd, only try odd numbers, as master combo's are always all odd numbers or all even.
The underlined numbers are the last digits, use the colour coding to find your first and second digits, if your last digit was 30 you'd use the 2 blue columns, the first number always being the left column and the second number being the right.
Enjoy, but don't do bad things with this manual... as they are, err... bad.
