OK guys, let's try to solve your common problems first then the rest will become clearer.
The Hobart A200,,,,,,,, does not use oil! It uses grease! If you see oil, it's because the grease is separating the oil in the grease. Both machines have not been serviced for at least 5 years. That's about the lenghth of the lifetime of most greases. I recommend that you call Hobart and ask about their tech. rates. All bearings should be checked carefully for wear, as should the worm gear, seal, and the Bronze gear that it turns. The Planetary (mixing part), should be removed as well, cleaned. and inspected. Replace the seal on the planetary and on the mainshaft. Removal of all old grease is required, as it's no longer doing the job it was designed to do, will result in advanced wear, and is the actual source of your problems. The seals were designed to seal grease, not oil.
If Hobart is too pricey for you, and they are for many, try to find someone from a wholesale restaurant equip. place who has rebuilt these machines, or find a repair shop who have experience with this Hobart model. If you'd like to tackle the job yourselves, go to www.hobartservice.com
. Register for free, then find the files that match your mixer model and ML # and download the parts files for it. These exploded drawings will be very helpful with your task.
Either way, these mixers need to be opened up to remove existing oil and hardened grease, especially the oil! The planetary must be removed to drain any oil out of it and to regrease it. If you can get the oil out of the mixer, a short fix would then be to simply regrease the the mixer and put it back into service, leaving the existing seals in place. Don't forget to wipe out the shiny ring on the planetary, if it too has oil in it.
There is no seal at the hub. No seals can be tightened. The oil leak underneath the mixer comes from the motor shaft seal at the transmission case where the pinion gear enters the trans., it flows down into the mixer support column and drips onto the floor or counter, again, because of the breakdown of the grease.
If you tackle the job yourself, find your local Chevron Distributor and get several tubes of the approved grease, namely, Chevron FM ALC EP NNGI 2. Chevron p/n 230204-000. If you've found this solution helpful, please rate it as fixya!
Good Luck! ricardok45