Milty Zerostat 3 - defunct

[CageyH]

My Zerostat 3 has stopped working.
The trigger has no pressure to activate or spring return.

Is this likely to be fixable, or is it likely to have to depart in the bin.

[Firebottle]

Bring it along Kevin, we'll take a look at it.

[CageyH]

I have stripped it down, and there is a crack in the magnetic section, which causes it to lose tension.
I think it is pretty goosed. I will pack it anyway.

[CageyH]

I have just welded the crack in the part that houses the crystal etc. And it now seems to work better than ever.
Having bought this second hand, I am wondering if is was cracked before.

[struth]

Pics please....this could happen to any of us:eyebrows:

Well fixed that man..did you weld or solder it

[CageyH]

Welded it.
But I think I put too much tension on the mechanism as it has now cracked again, and not at my weld either. :(

It will be more weld than original soon!

[RobbieGong]

Welded it.
But I think I put too much tension on the mechanism as it has now cracked again, and not at my weld either. :(

It will be more weld than original soon!

Modded then ! :D

[CageyH]

First thing to do is pull off the nozzle, and split the case.

https://c2.staticflickr.com/6/5566/30322201805_707bb546e4_z_d.jpg

After you have split the case open, remove this part.
You can see where I have welded this, and where it has cracked again - probably as I have put too much tension into it.

https://c2.staticflickr.com/6/5639/30322201305_9c28f38500_z_d.jpg

Welding this up will be fun, as the face next to the trigger sits flush against the case.

[struth]

bit of cast by look... hope you fix it again

[CageyH]

Very difficult to weld with my 130A MIG!

[struth]

can imagine... brazing wire maybe

[337alant]

You should strip it down completely, check to see what type of cast it is by grinding a bit of it, if you get yellow sparks its cast steel if you get red sparks its cast iron, if its cast steel use a E6013 electrode, if its Cast iron use a nickel based electrode for repair techrod55 or 99 should do it , heat the whole thing up first to 100 C and weld a small piece at a time , as soon as you stop welding peen the weld with a chipping hammer point to retard the shrinkage of the weld metal wait 5 mins then weld another piece, keeping the pre heat temperature up as well whilst waiting
Good luck

Alan

[CageyH]

Thanks for the advice Alan.
I have ordered a new one, so thought I may as well use what I have, so the MIG came out again.
I have welded it back up and it appears to be working with the little nozzle inserted. I have not overtightened it this time, so it should be good as a spare.