Depends how old, how bad. 5 years is a good life for a battery with moderate work load. If the plates are just "Hardened" it can be recoverable if they are heavily sulphated, probably not. Like Walt says, charge for UP TO 24hrs at 5A or so with the tops LOOSE to let out the gas but not the splashes, check regularly, see if you can hear or see it "fizzing" enthusiastically, if so that"s it charged. See what happens then. See if it"s the same on all cells. DONT get your eyes in the way of splashes goes without saying. If it looks not too bad and you want to go for a bit of reconditioning, empty out, flush with water (Distilled/de-ionised NOT tap)get rid of any sludge ( that can be shorting the plates at the bottom of the cells). Refill with sulphuric acid at about 1250/1280 SG. Recharge till it fizzes. If you have/can get a hydrometer, a charged reading of 1250 or better is what you are looking for. Usual health & safety warnings. Hydrogen gas is what is fizzing, makes some good bangs !
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Today's Featured Article - Ford Part Number Trivia - by Forum Participants. "Replaced by" means the part was superseded. All of my part books date back to 1964 and New Holland have changed some part numbers. They usually put the old Ford part number on the package. I was suppressed when I looked up the part number of the auxiliary drive shaft because for some reason the part number went through a radical change and it lost its "Basic Part Number". Ford part numbers follow the following rules. Most part numbers are in three parts. The middle part is called the
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