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Implement Alley Discussion Forum

Removing blades from brush hog

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lee in mass

02-28-2006 06:36:30




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Hi, I've got a BigBee AgriFive bush hog that needs to have the blades sharpened. Got the thing up on its side and removed the shaft pin and nut. But the disc doesn't seem eager to come off. Anyone know what to do next. Really don't want to sharpen the blades in place.




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Michael Soldan

02-28-2006 19:15:51




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 Re: Removing blades from brush hog in reply to lee in mass, 02-28-2006 06:36:30  
Lee, I used to remove the blades to sharpen mine and then realized as others are saying that I was just creating more work. I pick the mower up by the loader and stand beside it and sharpen with a 4' grinder, can do just as good a job as if I take them off, have had my old brush hog over twenty years..... .Mike in Exeter Ontario



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txgrn

02-28-2006 18:05:35




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 Re: Removing blades from brush hog in reply to lee in mass, 02-28-2006 06:36:30  
Just asking for extra work. Leave the mower on the tractor. Lift to highest point. Brace adequately. Lie down on the ground at the rear with a 4" grinder and sharpen to your heart's content.

Why go thru the trouble of trying to remove them when it is a terrible job and totally unnecessary.

Mark



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BBx

02-28-2006 10:11:13




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 Re: Removing blades from brush hog in reply to lee in mass, 02-28-2006 06:36:30  
I do like you for the first part. Turn it up on its side. But then I just use an angle grinder and sharpen them without taking them off.



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supergrumpy

02-28-2006 08:56:34




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 Re: Removing blades from brush hog in reply to lee in mass, 02-28-2006 06:36:30  
if yours is built like mine, don"t remove that big center nut

I got mine loose and the whole shebang dropped into the dirt pouring out grease and oil, spacer for the oil seal got turned upside down and took me several tries to figure that one out and stop the seepage

blades are usually mounted on ends of a sort of spacer bar, undo those 2 bolts using huge breaker and 3/4 drive sockets thru hole in deck like other post said

use antiseize when reassembling

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TomTX

02-28-2006 08:05:32




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 Re: Removing blades from brush hog in reply to lee in mass, 02-28-2006 06:36:30  
Leave the mower on the tractor 3-point. Should have an inspection plate which removes with small bolt or two. Through the hole you can use a socket and extension to reach the blade bolts. No need to remove the "stump jumper disk" at all. Tom



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lee in mass

02-28-2006 08:54:27




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 Re: Removing blades from brush hog in reply to TomTX, 02-28-2006 08:05:32  
Thanks so much, Tom. I"m new to this so I keep doing things the hard way.



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Bill in TN

03-02-2006 07:44:30




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 Re: Removing blades from brush hog in reply to lee in mass, 02-28-2006 08:54:27  
There is one school of thought that says not to sharpen bushhog blades as a dull blade causes the stem of the weed to shatter, split and bruise,and it doesn't grow back as fast as a clean cut from a sharp blade. A plant has to expend more energy repairing the damage from a dull blade and as a result doesn't grow tall as fast. If you look at replacement shredder/bushhog blades, they are not sharpened, and this is by design.

A mower is designed to make a clean cut so you don't get a brown top on cut grass and is what you need if you want it to grow back fast. Sharp mower blades do less damage to grass and makes everything look nice.

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Bill in TN

03-02-2006 07:57:23




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 Re: Removing blades from brush hog in reply to Bill in TN, 03-02-2006 07:44:30  
Sorry, I really didn't answer your question. I had to remove the stump jumper and blades to get a piece of wire removed. I tried a lot of different things, but what worked for me was to soak the end of the shaft with a penetrant of some kind. Lightly wire brush the area and clean it as best you can. Lightly tap the shaft with a hammer and 2 by 4 to loosen the crud.

I then took a chain and secured it around the blades as close as I could get to the stump jumper. Screw the nut back on a few threads so not to damage the end of the shaft, place a hydralic jack on the nut and place the chain over the end of the jack and start jacking. This is kinda like a flexable gear puller.

Be careful as it might take several hundred lbs. of pressure to break it loose and if the stump jumper is rusted it may break before it gives.

If you go to the trouble to remove the blades, you may want to replace the seals on the gear box at the same time.

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