After reading alot here thought i would ask about my bush hog.....Got a older 5ft bush hog i think its a razorback. got it used in 2007 have cut many times with no problems. I often check fluid in gear box,ect. about 2 weeks ago it started making a loud tapping noise like the blades were hitting the frame,ect. braced it up to get a look under deck and blades seem fine not hitting, spins freely best i can tell. DID NOTICE round stump jumper is VERY wobbly and you can rock it back and forth so blades may be hitting the top of the cutter. any ideas or suggestions? thank you all for a great forum!
Bush Hog razorback (Help?)
- Thread starter rtd2
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flyingcow
Veteran Member
When mine does the "blades wackin' the bush hog" it means time to tear it apart and rebuild the gearbox. usually only does it when you shut it off, and it's winding down. Last time i had it rebuilt it cost $1200. Should have bought a new gearbox instead of rebuilding it.
flyingcow
Veteran Member
Also, if you have slip clutch versus shear pin, might want to make sure the slip clutch is working properly. I plan on buying one thru sweettractors for my unit.
Bear Foot Farm
Silver Member
Is the stumpjumper loose on the output shaft, or is the shaft wobbling in the gear box?
One is a simple fix
One is a simple fix
All THANKS for the quick replies I apologize I was gone all day today.
I will check the areas mentioned. and maybe gets some photos up to help,can say the rattle is CONSTANT from time u start it till shut off. dont run bush hog right now as i dont wont something coming loose. thanks again will update with findings tommorow.
I will check the areas mentioned. and maybe gets some photos up to help,can say the rattle is CONSTANT from time u start it till shut off. dont run bush hog right now as i dont wont something coming loose. thanks again will update with findings tommorow.
Gary Fowler
Super Star Member
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I recently repaired my BIL's 4 foot bushhog. Started out to just sharpen the blades, however when we pulled the blades and stump jumper off, I found that the weld at the shaft that held the flat bar connection for the stump jumper was broken completely off. This had caused the stump jumper to warp since if was then actually holding the blades in place. Removed all the bolts and sledge hammered the stump jumper back into shape. THen put a double bevel on the 1/2 plate where it welded to the hub and welded it back up with a 100% penetration weld. I also put some more weld on the other connection as it was very poorly welded. It is better than new now.
RAIN today all day! first measurable amount in 33 days so we needed it and it comes with cooler air for those of us still baking in the deep south. Will give it another look and update. I've read and learned alot today (Atlesat 60 pages worth of messages) :thumbsup:...this site has a priceless amount of information. Thanks
all day! first measurable amount in 33 days so we needed it and it comes with cooler air for those of us still baking in the deep south. Will give it another look and update. I've read and learned alot today (Atlesat 60 pages worth of messages) :thumbsup:...this site has a priceless amount of information. Thanks
kebo
Elite Member
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- 2001 John Deere 790 4x4, bar tires
All THANKS for the quick replies I apologize I was gone all day today.
I think something has already come loose, it just hasn't come completely off of the gearbox yet!!
whistlepig
Elite Member
You won't be able to figure out anything until you tighten the stump jumper. Gear boxes on brush hogs rarely wear out if they have oil in them. Stump jumpers coming loose isn't that uncommon. If the stump jumper comes all the way off you will have a frisbee on steroids. It will slice off the bottom of your tractor tires and perhaps the legs of anything alive close by.
:shocked::shocked::shocked: Thats what I'm afraid of......Weather cleared up but I cant get the nut off the bottom of the Jumper :mur: sprayed it with PB try again tommorow. Oh I cant tighten nut either so I'm not sure if pan is loose on the shaft or its something else. I cant see much but blades turn freeley in all directions. if you grab the jumper pan it will rock side to side.
Hey Guys! sorry to dig this thread up but i figured it would be easier than stating a new one since this thread already discribes my issue. I JUST got around to pulling off off the stump jumper today and the shaft is wobbling inside the lower housing im attaching a few recent photos in hopes I could get some ideas on what part(s) i need for fixing. B.T.W I did some more research and found out this is a Bush Hog Model 12. its pretty old but still solid and cut great before this happened and I'd love to get it cutting before summer. I think i found the correct gearbox diagram here
BushHog Parts Diagrams
thanks again
BushHog Parts Diagrams
thanks again
Attachments
Bear Foot Farm
Silver Member
I would suspect the lower bearings if there is no visible damage evident
Thanks for the QUICK response. There is no damage visible. I will open the gear box tommorow to be sure. I'm decent with tools and general repairs but I've never tore into one of these gearboxes. what's involved in replacing the bearings? would it involve parts (BEARINGS/SEAL) in this diagram i scanned? thanks again for your help!
Attachments
Your first picture shows plenty of visible damage...the shaft is laying at the bottom of the opening. There's no bearing left inside there and the seal is gone. I'm not trying to be a downer but don't be surprised if the bearing races and a few other areas are severely damaged in there. I would bet that the lower end of that gear box is shot or close to it.
If it were me I'd replace the gear box.
If it were me I'd replace the gear box.
Just Bill
Silver Member
Check the price of a new one but you can probably rebuild this one for a lot less.
kebo
Elite Member
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- Tractor
- 2001 John Deere 790 4x4, bar tires
I would at least get it apart and inspect it very closely before making any decisions. If it looks repairable, then price the parts and while you are at it, price some new boxes (that will drop right in). That should tell you which way to go.
As hightechtTed stated, it looks like the entire bottom bearing is gone, that would certainly allow the shaft to wobble. The problem is that if it was wobbling bad enough, it was also beating up the gearbox housing and the shaft. It might just be that neither a bearing nor a seal will fit snug now, but you won't know until get it apart. Good luck.....
As hightechtTed stated, it looks like the entire bottom bearing is gone, that would certainly allow the shaft to wobble. The problem is that if it was wobbling bad enough, it was also beating up the gearbox housing and the shaft. It might just be that neither a bearing nor a seal will fit snug now, but you won't know until get it apart. Good luck.....
Dont know how long bearing was shot but i remember cutting with it and the next day it started the noise and i shut it off and have not used it since. I Got it apart today and I dont know 100% what i'm looking for in terms of damage so I cleaned off grease to get a few pictures in hopes ya'll could give me some further input. Did pull out a tangled piece of metal thats pictured with the output shaft. thanks again to everyone for your help.
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Found a new set of BH seals and Bearings for 40$. I have a detailed diagram but i'm not sure exactly how to install them? does the seal drop in from the top of the housing or press onto the bottom? as for the missing bearing I'm guessing it goes in spot A or B (See pict below) EITHER spot would require removing the nut and gear correct? thanks for any input! this site is a great resource!
