Hi, I have a Snap-on Mig 130 (Cebora Pocket Mig clone), and had to dismantle the torch to replace the liner. On reassembly I noticed that the gas pressure on the gauge drops, even though the trigger is not pressed. I am fairly sure it is coming from the black plastic thingy where the electrical on/off is connected. I have replaced the o-ring on this part, which has improved, but not stopped it. If the torch is dismantled and I hold the assembly tight together, there is no leakage, but when re-assembled into the gun,
the leak reappears. I remember seeing an on-line video saying that the gas seal was made by the plastic casing of the gun (reassembled) holding everything tight together, but I read on here somewhere that the plastic bit was originally stuck (glued ?) to the brass body. Anyone know which is correct please? Thanks.
- Thread starter cobox
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mike 109444
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Try a bit of soapy water around the valve AND the push in pipe connector.
And welcome BTW
And welcome BTW
Thanks for the welcome, Mike. I used gas leak detector to test, but can only do that when the torch is dismantled. It only leaks when put back together. I know this from turning the gas on to pressure up the supply line, then turning off the gas and seeing the pressure drop on the gauge. This doesn't happen when everything is apart and I'm holding it together by hand.
mike 109444
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I would not think or expect the shell of the torch to hold every thing tight to help with sealing.
I would think that during the reassembly some part of the case is pushing the gas flow button "on" or is pressing on the gas pipe "push fitting" (semi clear pipe).
I would think there should be a small amount of slack in the trigger of about 1mm before it touches the gas button. Worth putting half the torch shell back together and checking for the free play maybe.
I would think that during the reassembly some part of the case is pushing the gas flow button "on" or is pressing on the gas pipe "push fitting" (semi clear pipe).
I would think there should be a small amount of slack in the trigger of about 1mm before it touches the gas button. Worth putting half the torch shell back together and checking for the free play maybe.
