Rotary Cutter Lubricant leaked from Bush Hog Rotary Cutter

[Batman50615]

Have on old Bush Hog Rotary Cutter Model 105 Serial # 30964. The lubricant leaked from the gearbox and comes out from underneath. What do I need to do to fix? Where can I find instructions on how to repair? What is the correct lubricant to put back in once it is fixed? To what level do I refill the lubricant once it is fixed?

 

[SPYDERLK]

It is the output shaft seal. You can put cornhead grease or even std NLGI 2 in it and just keep running it for many years. Fixing it will require taking it apart ... time, tools, and skill. And it might go bad again ... quickly or not. :confused3:
larry

 

[Batman50615]

Sorry, but I'm not real mechanical. What is cornhead grease & std NLGI 2? Maybe a brand name & viscosity rating or something that would help me pick the right thing from a Farm & Home Store.

 

[cmore]

I just pumped mine full of bearing grease that I use for all the grease zerks on the equipment. Has worked for several years w/o issue.

 

[Ductape]

I just pumped mine full of bearing grease that I use for all the grease zerks on the equipment. Has worked for several years w/o issue.

Same here, sep'n mine was full of grease when I bought it. I ran mine that way for five years and sold it (just didn't need a bush hog anymore). I'm sure the new owner will run it for many more years with the gearbox filled with grease.

 

[Clint S]

It's really not hard to fix, but the parts are heavy and require large tools. If there is any wobble at all it oblongs the seal and they leak. I replaced my seal twice before giving up and filling with grease too

 

[Soundguy]

could just be the seal.. or could be a bad bearing.

it's worth checking.

if it does not leak fast on 80w90 gear oil.. go with a 0 EP grease jd cornhead grease is 0 ep. lubes like snapper/stens make a 00ep grease for lawn/golf course maint equipment as well.

checkt hhat bearing though.. if bearing is bad.. it will eat seals,, and leak worse till it flies apart..

 

[thatguy]

Sorry, but I'm not real mechanical. What is cornhead grease & std NLGI 2? Maybe a brand name & viscosity rating or something that would help me pick the right thing from a Farm & Home Store.

If you go to a tractor dealership (especially a JD one) they should have 'cornhead' grease -


John Deere Special-Purpose Corn Head Gun Grease - AN102562

its thick enough that it wont reach a melting point and leak past the seals..

Brian

 

[Depmandog]

I have an old Bush Hog 13' flat rotary cutter. The outboard seal was leaking BAD on mine so I replaced it. The hardest part was getting the stump jumper off. We ended up cutting a hole in the deck and sliding a large solid bar down thru the hole to the topside of the stump jumper and then pounding on the bar with a 16 pound sledge, we also applied heat. Wow, it was a tough bird to remove.

Once it was off, piece of cake to replace the seal. And the seal was only around 10 bucks if I recall.

As far as quantity of oil, the two out board hubs on mine have a 1/4" "fill to this level plug" that when oil runs out - it is full. The center hub just has a fill opening part way up on the gearbox, and you put oil in it until it starts to run out the same hole. Pretty simple. I use 90wt gear oil, but then my seals are in pretty decent shape.

Ditto what has been said re: checking the bearings and the grease if your seals are leakers.

 

[MESSMAKER]

Try Cornhead grease first. Two tubes are about $10. It takes 15 min. to fill it up. Way easier than a seal. Cornhead grease thins more atr heat to act like the regular lube. I don't understand why it does not come from the factory with it.