disconnect the battery.....

[DarkBlack]

I can't beleive the usual doubters are letting me get away with this one.

 

[Baby Grand]

Heck, I'm still trying to figure out what you just said.
I'm good with anything as complex as a flashlight circuit.
Beyond that I get that "what'd ya do with the ball" dog look.
Can you give me a plumbing analogy?

 

[Jesse masterson]

Would that fact matter even if you were welding on ac current, would the battery absorb ac current.since its DC

 

[Soundguy]

think about what is happening wih ac current. it simply swaps polarity.

 

[wolfpack2]

The main reason the OEMs tell you to disconnect the battery is to power down all of the electronic modules in the vehicle. A powered down circuit is much less susceptible to EM damage than an energized circuit. It is the EM radiation produced by welding that the manufacturers are concerned about.
Most people forget that there are several circuits and modules that are on at all times and just turning off the car/truck/tractor does not turn them off.

 

[DarkBlack]

Digital circuits that are still powered with the key off, are usually co-supported by an internal backup battery or storage capacitor. So if you desire to pull your battery connections, you will have to wait for the caps to discharge on those devices. The ones with internal batteries will still be live. If you're worried about EMI, You might want to think about any other elecronic device in the area.

 

[Johnp33]

I worked on Class eights, I was always taught to disconnect the batterys period both cables. I always thought it was a waste of time, then a truck was brought in with a no start condition, it had stainless boxes on the side of the deck, and a recent weld, the trucking company was not a fly by night outfit. They did a lot of fabricating, and specialty work. The ECM was fried, and the core was denied he paid, that is about a $2,800 touch, for an M11 ECM plus reprogramming and resetting all the presets, If you ever see an M11 in a FL112 you will understand why it was a 8 hour job, that was an $840.00 labour charge.
I worked at a trucking outfit and they were welding the light box on a set of triples, the "C" box and it burnt out every marker and clearance light on the three trailers. The truck was running and the lights were on.
There are a lot of rules about electricity, the bad thing is that electricity does not seem to be able to read.
I always waste my time and disconnect the batteries, good time to clean the connections anyways.

 

[k0ua]

I just got done welding my hooks on the Kioti bucket. I did not disconnect the battery. There are 2 control modules, several sensors on board this tractor. I made sure I had a good ground connection on the bucket itself. Everything still works. Not saying it is a good or bad idea.. just saying what I done, and the results.


James K0UA

 

[DarkBlack]

I worked on Class eights, I was always taught to disconnect the batterys period both cables. I always thought it was a waste of time, then a truck was brought in with a no start condition, it had stainless boxes on the side of the deck, and a recent weld, the trucking company was not a fly by night outfit. They did a lot of fabricating, and specialty work. The ECM was fried, and the core was denied he paid, that is about a $2,800 touch, for an M11 ECM plus reprogramming and resetting all the presets, If you ever see an M11 in a FL112 you will understand why it was a 8 hour job, that was an $840.00 labour charge.
I worked at a trucking outfit and they were welding the light box on a set of triples, the "C" box and it burnt out every marker and clearance light on the three trailers. The truck was running and the lights were on.
There are a lot of rules about electricity, the bad thing is that electricity does not seem to be able to read.
I always waste my time and disconnect the batteries, good time to clean the connections anyways.

Blowing lights from welding, would happen even faster if the battery was disconnected.

Welding on a running vehicle is a whole different circumstance.

 

[Soundguy]

I just got done welding my hooks on the Kioti bucket. I did not disconnect the battery. There are 2 control modules, several sensors on board this tractor. I made sure I had a good ground connection on the bucket itself. Everything still works. Not saying it is a good or bad idea.. just saying what I done, and the results.


James K0UA

my guess is that most people that damage stuff by welding fall into one of these catagories:

1, welded THRU something into a wire or caused insulation to melt from heat conduction.

2,welded thru a bearing or bushing causing a galling, distortion or seizing.

3, welded on a part that, due to ground placement.. welded thru another part or cable as a ground path, due toi an insuficient ground location they chose with t he cable