Brush Hog Gearbox rebuild

Rtkman-706 · May 30, 2011

I recently got a brush hog with a large gear box (2" output) that has been apart for a while. It appears the lower bearing went out which then caused the gears to get out of mesh and they are chipped.
My question: Is it typically cheaper to replace the box or replace the gears & bearings?
Thanks.

D7fever · May 30, 2011

probably best to just replace it, if you do put it back together, it will probably sing enough to drive you crazy, or just disintegrate. probably cheaper too.

keh · May 30, 2011

I fooled with keeping used Bush Hogs repaired and finally bought a new one. Haven't tore it up yet.

KEH

keh · May 30, 2011

I fooled with keeping used Bush Hogs repaired and finally bought a new one. Haven't tore it up yet.

KEH

Brian in Ohio · May 30, 2011

Give a call to Brian Brooks (Not me) 877-885-4300 at DN Equipment Parts. He"s a gearbox GURU. Probably has either a replacement gearbox in stock, or the parts to fix yours, and will tell you which avenue would be cheaper...

Tell him you heard about him through YT, and he"ll take good care of you!
DN Equipment Parts

Anonymous-0 · May 31, 2011

I have a couple of used ones(1 Ford 501) give me a call. Jim --No-Advertising-in-Forums

Ken Macfarlane · May 31, 2011

If it is bushhog brand, I junked an 8 fter because the output shaft sheared off and the whole gearbox was something like 1000$. Later I read a post by someone on tractorbynet who was able to order just the shaft from bushhog for 100$ or so. Kicking myself every time I hook up the 5 ft hog that replaced it.

Anonymous-0 · May 31, 2011

I've been hitting the same wall. It appears the gear box replacement cost ($500) may be more than what I paid for it. Hopefully not, but if so that would be OK since I got it cheap. I'm still getting information on individual parts replacement. Note to self: big gearboxes (120hp) are very expensive to replace.

oldhousehugger · May 31, 2011

A couple of years ago I rebuilt a 1950's Continental Belton post hole digger. The previous owners had run it without oil and galled the gears and smoked the bearings. Since the gearbox on that old gal ran pretty slow and intermittently I figured that if I touched up the gears with a fine flap disk on the right angle grinder and replaced the bad bearings it would run right for my purposes. Sure enough with new bearings shimmed to the right clearance it runs well. I did have to make a new lower bronze bushing because it was a dealer item and no longer available anywhere.
My take on the gears is if the new bearings will hold tolerance and you can clean the galling on the gears with a fine disk then why not give her a go? Another thing I've discovered is that the less horsepower you try to force through a gearbox the longer it lasts.
Another thing I've discovered is that you can install grease fittings on old gearboxes and keep the bearings well lubricated and they will hold up much better than the original design.
John

Brush Hog Gearbox rebuild

Rtkman-706

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D7fever

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keh

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keh

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Brian in Ohio

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Anonymous-0

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Ken Macfarlane

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Anonymous-0

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oldhousehugger

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