Omega Owners Forum

Chat Area => General Discussion Area => Topic started by: Debs. on 20 March 2009, 19:14:28

Title: Welding and alternators?
Post by: Debs. on 20 March 2009, 19:14:28

I`m going to do some chassis welding repairs on 'Lazarus' (my old Land Rover Seriess III) tomorrow....`trying to recollect: to prevent damage from (possibly) stray, welding current, do I need to remove the battery -ve cable or the alternator +ve cable?

Title: Re: Welding and alternators?
Post by: Welung666 on 20 March 2009, 19:16:08

I always remove both cables, no idea why just always have :P

Title: Re: Welding and alternators?
Post by: Tony H on 20 March 2009, 19:22:05

Quote

I always remove both cables, no idea why just always have :P

Agreed :y

Title: Re: Welding and alternators?
Post by: Pitchfork on 20 March 2009, 19:22:58

I once had a Mk2 Capri that went into a body shop for repairs including new panels welded on. They did not remove battery or altenator
For several weeks after I got it back it burnt out contact breakers every 2 days then they fitted a resistor in series because there was about 20 volts coming out of the altenator
Eventually the penny dropped that the diodes had been blown during welding & they fitted a new altenator to solve the problem!

Title: Re: Welding and alternators?
Post by: Lazydocker on 20 March 2009, 19:40:37

You need to remove the battery -ve Debs. But I always just whip the battery off (or at least both terminals) as it takes a whole minute to do.

Title: Re: Welding and alternators?
Post by: miggcddave on 20 March 2009, 19:43:35

Quote

I`m going to do some chassis welding repairs on 'Lazarus' (my old Land Rover Seriess III) tomorrow....`trying to recollect: to prevent damage from (possibly) stray, welding current, do I need to remove the battery -ve cable or the alternator +ve cable?

hi i remove the battery ? and keep earth lead close to welding area sa possible . to keep welding current local . watch for any cables running through chassis  :'( my mistake before ended up with no back lights :-/

Title: Re: Welding and alternators?
Post by: Tony H on 20 March 2009, 19:44:20

For the time it takes to pull the plug off the alternator (just in case) it's worth the effort  :y

Title: Re: Welding and alternators?
Post by: Andy B on 20 March 2009, 19:46:34

Quote

.....
 it burnt out contact breakers every 2 days  ......

Remind me .... what are they?  ;)  ;)  ;D  ;D  ;D



The best thing ever to be replaced by modern electrickery. :y  :y  :y

Title: Re: Welding and alternators?
Post by: Debs. on 20 March 2009, 19:51:25

Quote

Quote

.....
 it burnt out contact breakers every 2 days  ......

Remind me .... what are they?  ;)  ;)  ;D  ;D  ;D



The best thing ever to be replaced by modern electrickery. :y  :y  :y

 :y Agreed; `utterly pointless! ::)

Title: Re: Welding and alternators?
Post by: Andy B on 20 March 2009, 19:53:54

Quote

Quote

Quote

.....
 it burnt out contact breakers every 2 days  ......

Remind me .... what are they?  ;)  ;)  ;D  ;D  ;D



The best thing ever to be replaced by modern electrickery. :y  :y  :y

 :y Agreed; `utterly pointless! ::)

 ;D  ;D  ;D  ;D  ;D  ;D  ;D very good!

Title: Re: Welding and alternators?
Post by: Pitchfork on 21 March 2009, 11:53:43

Quote

Quote

Quote

.....
 it burnt out contact breakers every 2 days  ......

Remind me .... what are they?  ;)  ;)  ;D  ;D  ;D

Where's your coat??

The best thing ever to be replaced by modern electrickery. :y  :y  :y

 :y Agreed; `utterly pointless! ::)

Title: Re: Welding and alternators?
Post by: miggcddave on 21 March 2009, 21:05:35

Quote

I`m going to do some chassis welding repairs on 'Lazarus' (my old Land Rover Seriess III) tomorrow....`trying to recollect: to prevent damage from (possibly) stray, welding current, do I need to remove the battery -ve cable or the alternator +ve cable?

how did the welding go today  :y

Title: Re: Welding and alternators?
Post by: Debs. on 21 March 2009, 21:26:46

Quote

Quote

I`m going to do some chassis welding repairs on 'Lazarus' (my old Land Rover Seriess III) tomorrow....`trying to recollect: to prevent damage from (possibly) stray, welding current, do I need to remove the battery -ve cable or the alternator +ve cable?

how did the welding go today  :y

I`m about half way through the welding/patching; the area around the O/S rear shackle-mounting is left to complete tomorrow (weather permitting).
I disconnected the battery and alternator; so all should be electrically well when the job is competed. ;)

Title: Re: Welding and alternators?
Post by: Vamps on 21 March 2009, 21:35:58

Good for you Deb's....... :y

Title: Re: Welding and alternators?
Post by: Marks DTM Calib on 21 March 2009, 22:00:54

The old trick was to remove the battery and short the pos and neg leads together.

Title: Re: Welding and alternators?
Post by: miggcddave on 21 March 2009, 22:11:54

Quote

Quote

Quote

I`m going to do some chassis welding repairs on 'Lazarus' (my old Land Rover Seriess III) tomorrow....`trying to recollect: to prevent damage from (possibly) stray, welding current, do I need to remove the battery -ve cable or the alternator +ve cable?

how did the welding go today  :y

how many burns did you get on your self  :'( ive got burn scars all over my arms  >:(
I`m about half way through the welding/patching; the area around the O/S rear shackle-mounting is left to complete tomorrow (weather permitting).
I disconnected the battery and alternator; so all should be electrically well when the job is competed. ;)

Title: Re: Welding and alternators?
Post by: Marks DTM Calib on 21 March 2009, 22:16:33

Nice easy way to get a sun tan....bit of arc welding!

Title: Re: Welding and alternators?
Post by: miggcddave on 21 March 2009, 22:19:21

hell of a sun tan but it dont last very long  8-)