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Tractor Talk Discussion Forum

OT-Melted battery post

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David Gray

08-28-2006 10:08:16




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I use a 36V golf cart to check fences and goats here in central TX (it's finally raining by the way!!). I noticed one battery terminal had melted the lead on the top of the 1st of 6 batteries yesterday. Don't know if it was a loose connection or what. Anyone ever try to fix a loose post? Thanks.




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David Gray

08-29-2006 07:54:12




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 Re: OT-Melted battery post in reply to David Gray, 08-28-2006 10:08:16  
Thanks for all the help! I'm going to try the setscrew repair this morning. Like all machines this is really handy...and heavy. Doesn't scare the livestock though. I didn't know anyone knew where Early was. There is a new, white water tank (lollypop) at the end of my driveway. Where are you in Early, Dave in TX? Have a great day (there were 3 1/2" of much needed rain delivered to our place in two days!!

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Gene Davis(Ga)

08-28-2006 19:03:38




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 Re: OT-Melted battery post in reply to David Gray, 08-28-2006 10:08:16  
I work at a golf course where we see a lot of this happen. It is usually caused by excess resistance in the connectio, better known as a loose connection. we had one battery to explode because of the hydrogen gas given off while in use and the spark of the loose connection triggered it. The golfer was quite shaken up!. It is necessary to go around the batteriies on a weekly basis and just snug up the connections. I usually take a 1/4"diameter x1"long lag screw and carefully drill a 3/16" hole in the flat part of the post terminal that is left. be sure to wear goggles when dealing with this. Thread the lag screw through the cable(s) and the screw the screw into the lead post that you have cleaned till it is shiny bright and when it reaches the point where it tightens up against the post tighten very carefully so that you don"t strip out the threads. We have some of these that have been running for 14-16 months. The secret to a good performing electric golf cart is to keep the cable connections tight and clean. There is a great need to keep the batteries clean also to keep down the self discharge that comes fro current leakage . It really makes a difference if you clean the connections good with baking soda and when they dry coat each connection witha good coating of grease like you use in a grease gun to keep down corrosion. This really helps when kept up on a monthly basis The batteries on 36 volt carts use a lot of water also. Keep the electrolyte above the plates and refill ONLY AFTER charging them. If you see the batteries with bulged sides you can be sure they have been run very low on water and the heat generated in discharge/recharge cycles makes the cases swell Do not run these batteries too low as that also cuts into their life cycles. The purple case Trojan 105 amp hour batteries seem to be the cream of the crop for sustained use. They are also about the most expensive batteries.

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Dave in Tx

08-28-2006 15:07:50




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 Re: OT-Melted battery post in reply to David Gray, 08-28-2006 10:08:16  
David, where outsike of Brownwood are you?? I'm in Early.



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Glen in TX

08-28-2006 10:27:11




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 Re: OT-Melted battery post in reply to David Gray, 08-28-2006 10:08:16  
They use to make molds to repour lead on posts but easiest way would be to just shim it with brass or lead sheet if you can.



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David Gray

08-28-2006 10:46:51




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 Re: OT-Melted battery post in reply to Glen in TX, 08-28-2006 10:27:11  
Thanks. I Thought of that, but wondered about using a flame around the top of the battery to do the melting. Any chance of an explostion? You getting any of this rain? I'm outside of Brownwood and enjoying it.



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Glen in TX

08-28-2006 21:43:55




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 Re: OT-Melted battery post in reply to David Gray, 08-28-2006 10:46:51  
No you don't want torch lit around it. I think they used hot lead in a ladle from lead melter so no flames near battery. The lag screw idea above sounds good. Yeah been getting lots of rain this past week in panhandle and mowed down some 5ft. weeds today lol.



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KITO

08-28-2006 11:53:45




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 Re: OT-Melted battery post in reply to David Gray, 08-28-2006 10:46:51  
I used to work on electric fork lifts and all our connections were made with melted lead. If you take the battery caps off first and use the oxygen side of the oxy/acetylene torch to blow out fumes, while the torch is not lit of course, you should not have any problems.



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