Brush hog repair, seal

Hi guys my brush hog seal is leaking oil,so I took off the blades and rock skid plate. I have access to the bottom now and don't know where to go from here.There a four bolts holding the gear box to the deck,I don't see a cover to take off to access seal. It's an old UFT United farm tool hog. Any idea what to do next.Any help would be great. Thanks Randy
 
It may take more than a seal,
Probably need new bearings and races, if shaft is worn it may still leak after all new parts

Might try corn head grease or some just fill old leaking gearboxes with regular grease,

Many gearboxes have run for years with grease,
 
Should be a typical oil seal, that you need to carefully pull, so as not to gouge the mating surface or the shaft where it meets the seal. Like was said, the shaft could be worn, (look for a groove or slight wear/depression).

I won't pretend to agree with using tube grease in a component that is designed for splash lubrication. Technically, greases have different soap bases, some may not be compatible with others.I just don't have any faith that this lubricates properly, then it sits for years, someone pumps whatever amount into it, seemingly over time that is mess of old grease.

I thought there were seals made that can allow for some wear. You'll have to see what it looks like.

JD cornhead, and NLGI 0 are a stringy/tacky less viscous grease or oil (whatever the correct term actually is). These may not leak out like 90 wt. My old Rhino actually calls for 0 if I recall correctly.

A friend has an old Massey-Ferguson 5' rotary, that someone installed grease zerks on. You can't tell what is in there, how much, and you certainly do not want to overfill it either. They switched back to 90wt or heavier and it does not leak. I use a Lucas 90 wt if I recall, as I can not find the small quantity of the 0, thankfully its worked well for 15 years.

Another thing to be aware of is that these can pressurize, a vented fill plug is a good thing to have. I discovered mine was as I always check the lube before running it and after 1 pass or so, when I first use it for the season. For whatever reason it pressurized one year, as if it was over full and I let some drain out until finally it stopped. Eventually that would have failed an oil seal. Was not overfull either as I will turn it upside down once a year or every 2 years, drain it out and re-fill to the correct level, using the level plug as a reference.
 
Good morning guys just an up date on the hog. I used some regular Grease and it seems to be working good. Sharpened blades and that made a big change. Thanks again this site is awesome. Randy
 

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