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Tractor Talk Discussion Forum

Seen this to many times in the last few days

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old

05-08-2007 09:37:31




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Please guys be safe. I've seen in the last couple days a few people saying they have jumped started a 6 volt tractor with a 12 volt battery so figure this needs to be said. NEVER EVER HOOK a 12 volt battery to a 6 volt battery or it can/will blow up in your face. SAFETY first please.




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cat236

05-09-2007 01:50:14




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 Re: Seen this to many times in the last few days in reply to old, 05-08-2007 09:37:31  
Fear and respect all batterys,I have never heard of a battery blowing simply because it was jumped from a larger voltage battery.Most result from overactive acid in all or even one cell. The production of the vapor and some source of ignition is devestating. In high school Vo tech we were starting a piece of equipment with a jump/charger. We were just trying to start to diagnose and fan shroud was missing.One of the other kids began revving engine and positive lead began to come off and head for fan, i quickly reached to gab clamp and BOOM. I as well as my buddy standing next to me were covered in acid. I had a large piece of plastic shell lodged in my forearm.Yeah it hurt but the acid in it hurt much worse in a few short minutes. Since then any batteries that show sign of any leakage I rinse with water and remove caps. Connect clamps and move to a safe position to start charging.It only takes one time to make you safe..

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Billy NY

05-08-2007 19:45:41




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 Re: Seen this to many times in the last few days in reply to old, 05-08-2007 09:37:31  
This is one of those things that, I don't think I've ever given much consideration to, although I heard one story about it as a kid, the person involved having to quickly shed his clothes while others hosed him off.

Since reading about this here, the safety glasses go on everytime, when I charge a battery I clean the top, the caps come off first, check electrolyte, leave caps loosely on top, connect to terminals, then plug charger in, same in reverse when disconnecting. Jumping batteries on things, use similar care.

There is something about a volatile gas like this, with such a low flash point, in addition to also being concentrated inside a plastic case, that could send shrapnel your way with one spark, that seems to get my attention without hesitation.

The eyes being these soft little sphere's, somewhat stronger than martini olives, vs. a highly caustic substance and high velocity flying shards of a heavy plastic case, kind of tips you off as to changing your ways a little.

Wonder if there is any footage taken from a safety lab, showing one of these exploding, boy that ought convince a person.

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Aaron Ford

05-08-2007 19:41:59




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 Re: Seen this to many times in the last few days in reply to old, 05-08-2007 09:37:31  
So I wasn't supposed to put 24v to a 12v system?

I was in a bad way and needed to get home. I had one dead battery and another dead one in the truck. I connected the pos lead to one battery and the neg to the other. I interconnected the two (+/-) with one side of a set of jumper cables. This placed the two dead batteries in series and the net result was 24 volts (likely about 18v due to the dead batteries. Even at 18v, the starter spun like mad and the truck started immediately. I disconnected the batteries and reconnected one.

I am sure it was not terribly intelligent, but I got home on a darn cold day.

Cheers,

Aaron

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730virgil

05-08-2007 17:59:25




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 Re: Seen this to many times in the last few days in reply to old, 05-08-2007 09:37:31  
a friend tells about had a new john deere 730 diesel 24 volts. temp was below zero but dairy cow barn still had to be cleaned once a day and that meant tractor started and spreader drug to field. herman told me 2 mornings in a row i had battery blow up under my azz! the third day he had 720 diesel with pony motor.



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james in mo

05-08-2007 14:05:30




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 Re: Seen this to many times in the last few days in reply to old, 05-08-2007 09:37:31  
hello old, im one of those ding-dongs that you were talking about. i will admit what i did was stupid buttttt t at the time i did'nt know it could hurt anything. i guese ignorance is stupidity.



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old

05-08-2007 15:07:20




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 Re: Seen this to many times in the last few days in reply to james in mo, 05-08-2007 14:05:30  
I may self have done it before but I got lucky. Then one day I met a guy that had one explode on him and he was blind. That sort of cured me of ever doing it again.



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Buddy Schiel

05-08-2007 13:49:18




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 Re: Seen this to many times in the last few days in reply to old, 05-08-2007 09:37:31  
I have a friend that lost an eye 30 yrs ago doing that. Be careful.



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Ludwig

05-08-2007 11:38:57




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 Re: Seen this to many times in the last few days in reply to old, 05-08-2007 09:37:31  
Hmmmm.
I'm still curious about this. Has anyone on here ever actually seen anything happen? We've jumped the Super M off the truck for YEARS and never had anything happen other than it shortens the life of the jumper cables.
I'm real careful about it, ground to the frame on the truck and where the ground cable connects on the tractor and I make that connection last.

The Super M can be hard to pull start without a full size truck and I'm sure not going to buy a full size truck to start my tractor 10 times a year.

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Michael Soldan

05-08-2007 17:44:53




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 Re: Seen this to many times in the last few days in reply to Ludwig, 05-08-2007 11:38:57  
I was jump starting my Dad's car one night and there was the slightest spark when I put the positive cable on..the explosion blew all the caps off of the battery into my face, luckily the side tap was only a few feet away and I was able to wash my eyes and face..I have since seen two batteries explode and I mean explode..into pieces with a loud bang like a shotgun...Batteries are very explosive!..the gases produced by them is very volitile

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Sid

05-08-2007 17:05:42




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 Re: Seen this to many times in the last few days in reply to Ludwig, 05-08-2007 11:38:57  
I have done that as well in fact I have jump started a six volt with a twelve and six with a twenty four and twelve with twenty four. I am not going to say nothing will happen. I have never had a battery explode while jump starting but we take precaution. I know of four different explosions while jump starting. Three of them were jumping a twelve volt with a twelve volt. Two of the three they goofed up and hooked the cables backwards. The third one the key was left one when he jumped it. The only explosion that I know of when jumping a six with a twelve. The guy just knew because it was positive ground you had to cross the cables when you jump start. I am no expert just passing on some of my experiences.

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Bob

05-08-2007 15:14:58




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 Re: Seen this to many times in the last few days in reply to Ludwig, 05-08-2007 11:38:57  
Yes, I have had a battery explode. Once you experience that close up (thankfully I didn't get acid in my eyes), you will look at the thought of a battery explosion quite differently!



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Steven@AZ

05-08-2007 12:51:57




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 Re: Seen this to many times in the last few days in reply to Ludwig, 05-08-2007 11:38:57  
Have exploded a couple of batteries in my day... luckily enough I was looking away the first time, and wearing safety glasses the next time. Both times was just charging a 12 volt battery, but sparks were involved and blew the cases open. Not pretty at all.

Never had a problem jumping a 6-volt tractor off 12-volts, BUT I always unhook the battery and just use the 12-volts - once the tractor starts a quick move unhooks the jumper cable and puts the tractor cable back on the 6v battery before it quits.

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old

05-08-2007 12:40:43




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 Re: Seen this to many times in the last few days in reply to Ludwig, 05-08-2007 11:38:57  
As PatMz says. If you ever do see one blow up it could well be the last time you ever do see it. Yes it can kill you or the acid can burn your eyes to the point that you will never see again



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PatMz

05-08-2007 11:54:17




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 Re: Seen this to many times in the last few days in reply to Ludwig, 05-08-2007 11:38:57  
Just connect the jumpers to the starter lug and frame; just like the 12V conversions polarity doesn't really matter. Leave the battery out of the equation altogether.

Haven't seen one explode, but have seen serious "boil overs".



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mjbrown

05-08-2007 10:19:39




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 Re: Seen this to many times in the last few days in reply to old, 05-08-2007 09:37:31  
Amen to that. A farmer near here by-pass started his tractor standing on the ground next to it. Forgot it was in gear and it ran over him. He crawled a hudred yards or so and lay for seven hours in the field before some one driving by saw a hand wave in the distance and went out in the field to investigate. He was lucky only broke his pelvis. He will likely recover.



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georgeky

05-08-2007 10:14:31




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 Re: Seen this to many times in the last few days in reply to old, 05-08-2007 09:37:31  
Last year I had a 6 volt on the charger with the lids open and was grinding on something when a spark ignited the battery gasses and man what an explosion. I was lucky me and the guy helping were within 8 feet of it and neither one was hurt.



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RAB

05-08-2007 12:07:52




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 Re: Seen this to many times in the last few days in reply to georgeky, 05-08-2007 10:14:31  
Remember those battery gases are a mixture of pure hydrogen and pure oxygen - well OK, mixed with a bit of air - "cos it has been released inside the battery by splitting (hydrolysing) water. So they are in the ideal proportions to revert to water with a big bang. Don"t need more than one spark to start that reaction.
Regards, RAB



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georgeky

05-08-2007 13:28:24




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 Re: Seen this to many times in the last few days in reply to RAB, 05-08-2007 12:07:52  
The worst thing is just before it happened we had discussed the likelyhood of this happening. I don't know what was on my mind with that grinder. I moved the charger to the other shed.



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