Is there any danger to charging a "Reversed Charged" battery?

A while back I posted about my tractor with generator having the battery charged backwards. The plan was to replace the generator with an alternator, and buy a new battery. However the weather got bad and making brackets and all of that sort of thing is not work to be doing in cold and nasty winter weather.
Therefore, I'm hoping to just get the tractor usable for now, and do this replacement when Spring comes.
Apparently this battery was already reverse charged when I bought this tractor in Sept., at which time I ran it for several hours, and it ran fine. It was not until I tried to charge the battery that I had all those sparks and noticed the reversed charge.
Anyhow, the plan is to just charge the battery and use the tractor AS-IS until spring. It wont be used that often anyhow, but it's presently in a bad place and needs to be moved, as well as using it to move some snow as needed.
All it needs is to charge the battery. I'm just a little uncomfortable connecting the charger (backwards of course). Is there any chance of the battery exploding?
The only reason that the battery is run down, is because I tried to start the tractor when the distributor was wet, and it would not fire at the time, and also because I was working on the wiring to the lights and had them turned on for awhile.
There is still a good amount of charge in the battery, but not enough to spin the starter fast enough. If charging this battery ruins it, I really dont care because I intend to replace it anyhow, once I replace that generator.
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On Tuesday, January 5, 2016 at 6:53:03 PM UTC-6, snipped-for-privacy@unlisted.moc wrote:

Since it had been working that way, I would go ahead and charge it backwards. Look how dangerous it was the other way?
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On 1/5/2016 7:48 PM, snipped-for-privacy@unlisted.moc wrote:

My off hand guess is that the reverse charge battery won't work very well. Not what it was designed to do.
Batteries explode when the water decomposes to hydrogen and oxygen, and then is later ignited by a spark.
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On Tue, 05 Jan 2016 18:48:54 -0600, snipped-for-privacy@unlisted.moc wrote:

Hook up the charger to the battery pos to pos and neg to neg - Go by what IS pos and what IS neg, not what is marked. It won't cause any more damage than what has already been done.
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snipped-for-privacy@snyder.on.ca posted for all of us...

You have told him what to do what 5/6 times?
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I lost count. I'd say at least double that.
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