mick the builder

Well-Known Member
Morning all, as the title suggests, apart from battery, is there a need to disconnect anything else before sorting out the holes in my chasis?
 
just as a precaution check the chassis you are about to weld doesn't have the wiring loom passing through and I would disconnect both battery leads ,bad earth clamp connection on the welder could causes excessive current to travel through wiring earth's melting the loom
 
We use to disconnect the alternators, a few time the diodes have fffed up.
Now i dont disconnect anything i use the battery surge protectors that way every thing is protected and you dont have to find the code for the radios.

I am sure draper do one for about £20
 
I disconnect the alternator, as I think it hooks up to the same earth as the battery, so just disconnecting the battery doesn't disconnect the alternator from the chassis!
 
Thanks for all the suggestions, I think I will also dissconect the Alt. I wondered what putting an earth on the chassis would do to my loom? As for the radio codes, thats only fitted for show, cant hear the fooking thing when i'm driving:eek:
 
Only need to do the battery, my series has a plate in it saying before arc welding disconnect battery, no other warnings or welding advice
 
welding-plate-small.jpg
 
I think that says it all! As I will be mig welding, I can either go gassless with a neg earth, or with gas with a positive earth. Does this change things?
 
I dont disconnect anything the only thing i always make sure i do is keep the earth lead as close as possible to the part being welded.
This is on cars and new trucks never any issues.



Lynall
 
I think that when you've got an arc going, the current is going to go pretty directly to the earth, but when you're initiating the arc, you get explosions of current reaching much further in all directions and it's those surges that cause the damage. I certainly won't be risking it!
 
I think that when you've got an arc going, the current is going to go pretty directly to the earth, but when you're initiating the arc, you get explosions of current reaching much further in all directions and it's those surges that cause the damage. I certainly won't be risking it!
So very right:D
 
After having experienced an exploding battery many years ago ... it made quite a nasty acidic mess, which was blasted around the garage! Fortunately, I was behind the bulkhead at the time, otherwise I could have had a very quick acid bath!

Now I always remove both battery leads.

Be safe!

OSD
 

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