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Brush hog-gear box full of grease

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C Wilcox

03-18-2001 05:52:38

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I recently got a 5 ft. brush hog with a tractor and when I checked the gear box I noted it was full of grease instead of gear oil. A friend tells me this is OK and won't hurt anything that probably the seal is gone.

Anyone got any advice/???

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03-20-2001 11:47:58

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 Re: brush hog-gear box full of grease in reply to C Wilcox, 03-18-2001 05:52:38  
I had bought an old JD 207 brush hog, it had grease in the gear box. I thought I was smart and replaced it with new seals and oil. Well the seal failed, it burned up, I wish I had stuck w/ the grease.

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Joe Evans

03-18-2001 19:41:58

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 Re: brush hog-gear box full of grease in reply to C Wilcox, 03-18-2001 05:52:38  
Grease is OK. As long as the grease is fresh it will lube fine. As the gear box is working, temperatures rise and the grease becomes fluid enough to do its job. As a matter of fact, the gearbox on my old ZTR deck is grease only. It has a zerk on it and of course a vent. Before mowing I pump just enough grease in to make it just sneak out of the vent. During mowing, the grease will expand and leak out the vent, but that is visual evidence of having enough lube in the box.

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Steve from Tn

03-18-2001 10:38:32

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 Re: brush hog-gear box full of grease in reply to C Wilcox, 03-18-2001 05:52:38  
Hi Mr. Wilcox, years ago I was advised to put maybe a tube or two of grease in my gear box in case the seal went out. This would prevent the gears from wearing out before the leak was discovered. I have always done this. I have never had to replace a gear box on a cutter. I know that others have done this when the seal went bad until it could be replaced.

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Rick Lees

03-18-2001 06:30:07

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 Re: brush hog-gear box full of grease in reply to C Wilcox, 03-18-2001 05:52:38  
Same thing happened to me the 6 footer I bought had grease in it. When it worked all the grease out I put gear oil in it and it ran out as fast as I put it in. I don't think it will hurt it I used mine for a year b4 replasing both upper and lower seals. Hope this helps

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03-18-2001 18:41:57

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 Re: Re: brush hog-gear box full of grease in reply to Rick Lees, 03-18-2001 06:30:07  
The key is to still have some oil in the box with the grease. Packed solid with grease alone may not give enough lubrication to the gear teeth, as grease won't sling around in there and cover everything like oil does.

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