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How can I remove blades from sidewinder brushhog?

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Bill Hickle

06-14-2001 05:57:17




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I recently bought a used Sidewinder bushhog. The stumpjumper disc rotates fine, but the 2 blades do not rotate freely on the disc - instead they are frozen in place, with the end result that they are rigid like the fixed blades of a lawnmower. The bushhog works, but the blades will not recoil if they hit a stump.

I have spent hours and hours trying to get them off. They are held on with a 1 1/2" bolt that is inserted through the bottom of the blade, which extends upward through the disc, where a nut holds the bolt in place. Using 2 pipe wrenches with long (5 foot) pipes for extension handles, the nut immediately came off without a problem. I can't get either one of the bolts out, however. They will not turn, even with force applied by a pipe wrench with an effective handle of over 6 feet. I tried turning it to the right, then tried to the left in case the threads were reverse threads. No luck.

I sure would appreciate any help or advice. Thanks.

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Russ

06-15-2001 13:39:02




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 Re: How can I remove blades from sidewinder brushhog? in reply to Bill Hickle, 06-14-2001 05:57:17  
Bill, is it possible that those bolts are keyed or indexed somehow so that they will not turn as you remove the nut? I don`t remember the exact configuration on mine since I haven`t had them off in years but it is something along those lines. This much I do remember, break the nut loose and run it up the bolt so that you have some room to bang the nut downward and drive the bolt out, it doesn`t take much. Place a piece of 6x6 or something else under the stumpjumper so that it will not deflect when you bang the bolt. Now when everything is braced up solid, hit the nut with the heaviest driving implement(bfh) that you can get ahold of. It usually doesn`t need to be a real "sharp" hit, you don`t want to deform the threads on the bolt. Just let the weight do the work. Once the bolt becomes unseated it will probably almost drop out. Remember to torque adequately when you re-assemble the bolts. Mine calls for about 450ft/lbs if I recall correctly. BTW, I think the key here is to make sure that there is absolutely no deflection when you hit the bolt/nut with the hammer, you want to drive it STRAIGHT out. Heat and penetrating oil might also help. Good Luck, Russ

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Bus Driver

06-16-2001 17:10:18




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 Re: Re: How can I remove blades from sidewinder brushhog? in reply to Russ, 06-15-2001 13:39:02  
If the blades are not to be reused, cut the blade almost to the bolt hole with a torch (hot wrench, we call it) and finish with a grinder, perhaps 7" disc type. Grind to within about 1/32 of the bolt hole and the blade will come off. If blades are to be reused, be careful in the use of heat, might weaken the blade. PB Blaster is a good penetrant.



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Russ

06-17-2001 02:04:15




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 Re: Re: Re: How can I remove blades from sidewinder brushhog? in reply to Bus Driver, 06-16-2001 17:10:18  
You`re right Bus Driver, I should have been more specific about the application of heat. I`ve used it on the nuts, never on a blade to be re-used. Russ



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