6 replies to this topic

[sam138]

I changed my gas on my sealey mightymig turbo 120 xt , first time I have changed it and the regulator when placed on it and tightened did not seal until pressure lowered is this normal. I could not get any spark the wire feed is all working . The only other thing is when the regulator is turned to max you can here it coming from the gas line push in on the regulator . Could this be the regulator or is it an earth
Problem ??

Edited by sam138, 28 December 2013 - 09:45 AM.

[sonikk4]

Generally if there is no spark it's the earth. If the wire is feeding when you pull the trigger then the torch is live so points to the earth being the issue.

With regards to the gas is this a disposable bottle or a rechargeable unit from Adams / BOC etc.

[sam138]

Ok do I check for loose earth from machine and clamp end ? And the bottle is a disposable which came with the welder a sealey one .

[sonikk4]

First off make sure the metal you clamping to is clean. No paint or rust etc.

If after that there is still no spark then check the clamp itself. Then have a look inside the machine ( power off completely here) and check the earth connection inside. Did the welder work before you changed the bottle by the way??

The disposable bottles are notorious for being rubbish which is why on here and all the other forums we recommend you get a proper bottle and regulator. There are quite a few companies that hire out bottles etc and I have already mentioned two of them.

You will need another regulator which are easy to purchase and if you are doing a lot of welding will pay for itself very very quickly.

[M J W J]

I would get rid of the disposable bottles. In about 4 bottles time you will have spent the same amount as a proper regulator and a bottle of CO2.

 

When you swap to a bigger bottle, use ptfe tape between the threads on the bottle and the regulator. This will help ensure a proper seal. Also avoid lifting the bottles up by the tap on top of them. I've had a few bottles with faulty valves on the top and I reckon this is what is causing it.

[sonikk4]

I would get rid of the disposable bottles. In about 4 bottles time you will have spent the same amount as a proper regulator and a bottle of CO2.
 
When you swap to a bigger bottle, use ptfe tape between the threads on the bottle and the regulator. This will help ensure a proper seal. Also avoid lifting the bottles up by the tap on top of them. I've had a few bottles with faulty valves on the top and I reckon this is what is causing it.

I would hold fire on using the PTFE tape as I got shot down in flames for mentioning that on here. A decent regulator should not need any tape and I use the big Y bottles from BOC without any tape needed. If you suspect a leak some soapy water applied to the couplings etc will show up any leaks and may just need a tweak to stop any leaks.

[freshairmini]

I was always taught at college that you shouldn't use ptfe tape on them, the connectors are brass and soft so should form a good seal.

 

If the bottle leaks and you've bought a new regulator then either the reg needs to be returned as faulty or get the bottle changed as, surely, the gas company can't sell a leaky and basically dangerous bottle. Which is what my common sense tells me! :)

Edited by freshairmini, 28 December 2013 - 01:01 PM.