Hi, does anyone know if it is possible to change the lug on the earth lead myself. If not it's not possible does anyone know if weldquip sells then as I can't find them, Any help is appreciated.
Do you mean the lug at the end of the wire or the earth clamp?
Lugs are available near anywhere, I think one for 6 gauge will work. I actally picked mine up from big box store in their battery department (used on riding mowers).
If you have a suitable sized ball bearing you could set it up in a vice and squeeze the ball into the barrel of the crimp a couple of times. It leaves a set of round dimples that holds the wire nice and snug, and also looks quite professional. Best done with a loose vice that isn't bolted to the bench though! It may also be possible with some mole grips?