Help with Master 642(?)'s stuck dial

[ARF-GEF]

Hi

I have this Master padlock (maybe type 642? Not too sure, please correct me if I'm wrong) which I used from when I need a low security combination padlock.

The problem is the top dial is stuck. For no apparent reason (it did not fell down or anything) after normal usage I tried to close it but I realised the top dial won't move.
I can "lock" it with the other dials, but that not only reduces it to a 3 dial one, but also neglects the underlying problem.

I tried to reset the combination, successfully, but now instead of just the up-most dial not moving at all, now it became really hard to move the second dial either. So now I got a reset padlock which has 1 dial stuck the second dying, but I still can reset it to further combinations without an issue.

It is not even too old, 3-4 years or so. I believe they often come with life long guarantee but unfortunately I do not have a receipt.

Any ideas to help it or any explanations what can this be?

Here's a photo of the padlock:


Thank you very much for your help and ideas

[rai]

Spray some lube at it, that would be the first thing I would try,
you say you didn't drop it, maybe its time to drop it a few times, give the shackle a few jerks too. sometimes it helps to slap them around.
hey, thats all I got right now

[ARF-GEF]

Thank you for the advice Rai!

Shackle been jerked and it has been soaked with WD 40 Forgot to mention it in the original post
To no avail.
I've just tried smashing it a few times to the ground and that didn1T help either.
The padlock itself is not a big loss, I have a few padlocks (LOL) but I'm curious if someone has experienced this before and I would be much interested in an explanation.

[mastersmith]

Send Master a complaint (nicely, of course!) email asking if this is a warrantee item. Usually from a PR perspective company's will replace things to halt the bad press. Unfortunately there is no learning experience in that! If learning is the goal, break out the die grinder!

[ARF-GEF]

Good idea, thanks mastersmith!