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Implement Alley Discussion Forum

Bush-Hog Blades

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ScubaInstr

10-25-2005 09:25:35




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I have a "real" Bush-Hog brand (RazorBack 5 footer) rotary cutter I have just acquired, and have a question. This hog was purchased new in 1996, but never used. Instead, it sat out in a field (long story) until last Saturday. Spent Sunday afternoon de-rusting and cleaning the PTO Shaft so it will fit on my tractor's PTO, and now the blades are rusted to the stump-jumper. There is a hole behind the gearbox to remove a 1 5/16" nut that holds the blade to the plate. I soaked it down with PB Blaster for several hours. Then, I tried a 3/4" drive pull handle and socket. Couldn't budge it at all.....Move up to the 5' pipe (aka "Cheater Bar"). Broke BOTH the pull handle and the socket!
This afternoon, I'm off to Sears for a Craftsman socket & pull handle, but here's my question:
Could the bolt holding the blade to the stump-jumper be threaded backwards? I'm trying to turn it counter-clockwise to loosen.

All guidance appreciated!
Tommy D.

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ScubaInstr

10-26-2005 12:00:41




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 Re: Bush-Hog Blades - Thanks, Got them! in reply to ScubaInstr, 10-25-2005 09:25:35  
Thanks all. Here's what I did:

I sprayed them down last Sunday with PB Blaster (after breaking the 3/4" drive socket AND pull handle with a 5' cheater pipe), then again Monday night. Last night, I set the hog on blocks and jackstands, still attached to the tractor. I sprayed and tapped with a hammer several times. Went to Sears & got a Craftsman 1 5/6" socket and 3/4" pull handle (almost $50!). Got home, sprayed again, and they came loose with the cheater bar. VERY tight!
I cleaned them up with a wire wheel and put them back on - good as new!

Thanks for all the help!!!
Tommy D.

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evielboweviel

10-26-2005 14:17:57




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 Re: Bush-Hog Blades - Thanks, Got them! in reply to ScubaInstr, 10-26-2005 12:00:41  
use antisieze so you don't have to go thru this again??
Ron



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KEH

10-26-2005 05:48:48




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 Re: Bush-Hog Blades in reply to ScubaInstr, 10-25-2005 09:25:35  

On my Bush Hog brand bush hogs, the central nut that holds the stump jumper on has left hand threads. Do not bother this if at all possible. Its embarassing to have the SJ with blades fall off in operation because you didn't get the nut tight enough.

The bolts that hold the blade on are regular threads, as posted below, abd Bush Hog sells, or used to sell, a special heavy duty socket to fit them that has a big square shaft that extends above the bed of the bush hog. You put a big adjustable wrench on the shaft and a pipe extension on that anh have at it. The bolt has a tapered shoulder with one ridge on it that fits into a groove in the blade carrier. It is possible to turn the bolt in the groove, probably ruining the SJ-blade carrier. Suggest you try a hammer on the blades to knock the rust loose and try running the hog as suggested in other post, CAREFULLY.

KEH

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marlowe

10-25-2005 17:39:52




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 Re: Bush-Hog Blades in reply to ScubaInstr, 10-25-2005 09:25:35  
you should have some real tools 3/4 or 1 in. drive sockets and a air impact 3/4 or 1 in. or a 48 in braker bar. 1/2 in will not cut it. i change a lot of them and have never used the hot wrench . you get the right tools they will come loose



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wh

10-25-2005 18:10:16




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 Re: Bush-Hog Blades in reply to marlowe, 10-25-2005 17:39:52  
i have everything from 1/4" drive thru 3/4" drive. some off-brand but 90% is SK, Bonney, Craftsman. 3/4 drive is all SK. sockets from 15/16 to 2 1/2. have used the 3/4 with a 60" cheater and also had to have the "hot" wrench. some bolts regardless of what is hooked to them will not come loose without a "little" help!!



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wh

10-25-2005 16:58:22




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 Re: Bush-Hog Blades in reply to ScubaInstr, 10-25-2005 09:25:35  
use a "fire wrench" (torch) to heat the nuts red hot. there should be a cotter key thru the bolt to keep the nut on -- make sure it is not broke off flush with sides of nut.



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ric1

10-25-2005 16:25:27




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 Re: Bush-Hog Blades in reply to ScubaInstr, 10-25-2005 09:25:35  
i heated mine up with a cutting torch and they came right off



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Billy NY

10-25-2005 15:33:04




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 Re: Bush-Hog Blades in reply to ScubaInstr, 10-25-2005 09:25:35  
I've "wrestled" around with my Rhino SE-6, have stood on its side with the loader, and braced carefully so I could get access to both the top and the bottom at the same time, ( this is really a 2 person job ! ). Mind you, I braced/locked the loader frame up and the rotary cutter was hoisted with a chain and braced with 4x4's but I never stood under it, just off to one side, so it could not get me, I was comfortable with the way I had it uprighted, but I figure it's best to work on when you have 2 people, I used a pipe on the end of a large adjustable wrench and was able to get a bite on both sides by myself to loosen the shoulder bolts. I have not since done this, I just carefully flip it over now, no chance of it ever falling, had no help that day. Leaving it hitched to the 3 pt. and carefully blocking it up seems to be an easier way to get under there to sharpen the blades without removing them but if someone is up top that can turn the nut while you hold the shoulder bolt below, it makes it easy to remove the blades.

The nut on the shoulder bolt is standard thread on this Rhino SE-6, but a left hand thread, ( clockwise to remove if I recall, the parts details call for LH nut ). It is also nylon lined, kind of a thread locker, keeps it from backing off and loosening. If you do leave it on the 3 pt. to work on, I'd disconnect the P.T.O. and if it's a gas engine, why not pull the coil wire or disable the ignition, after seeing the results of what these things do to 1"-2" dia. brush, and all the other stuff I've taken down it's got my utmost respect.

I'm not sure if I've ever seen the stumpjumper option. Mine has a big round pan, with the flat plate across under it where the shoulder bolts attach, be curious to know what the "SJ" looks like and how it works.

By all means use care when working on it.

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Rod in Smiths Falls, ON,

10-25-2005 14:45:28




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 Re: Bush-Hog Blades in reply to ScubaInstr, 10-25-2005 09:25:35  
Rotary cutters are scary things to work on, aren't they? I discovered mine was less intimidating if I had it mounted on the tractor, raised, and then rested on two large wooden blocks and a jack stand. Then I could crawl underneath and get acquainted without claustrophobia. Tractors tend to lower 3 pt hitch implements whenever they see fit, so don't get any part of your body under there without full support.

The central nut is very, very tight. I'd leave it alone if possible. Make sure the gearbox is full of oil and go mow some rocks. It's not a precision instrument, and it should loosen itself up pretty quickly.

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supergrumpy

10-25-2005 09:42:18




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 Re: Bush-Hog Blades in reply to ScubaInstr, 10-25-2005 09:25:35  
I have a squealer - underneath the mower I have a short center piece taking power from the gearbox out to the blade pivot bolts

the 2 blades pivot on 2 large bolts with huge flat mushroom heads, the nuts on these 2 huge bolts face upwards and line up with the hole you mentioned, these bolts are regular thread and you can buy some at TSC or a bushhog dealer if you want to check

I use a 3/4 drive socket and extension long enuf to reach up thru the hole, first time off I used a 4 foot cheater but had the unusual good sense to put some anti-seize on when I put it together

I suggest you hook up the power takeoff and go chop some good heavy brush, this might get the blades swinging like they need to

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Jerry/MT

10-25-2005 11:23:50




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 Re: Bush-Hog Blades in reply to supergrumpy, 10-25-2005 09:42:18  
You might not want to do this if the blades are not sticking straight out in the running position becuse the vibration will beat the dickens out of the hitch and drive line until they free up. If you do this I would suggest you just "pulse" the PTO, i.e. engage and disengage quickly until you get a feel for what's going on. Be careful!



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BillD1

10-25-2005 15:29:04




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 Re: Bush-Hog Blades in reply to Jerry/MT, 10-25-2005 11:23:50  
I have found that PB blaster and an impact wrench will usually work



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