Oil seal for rear tine shaft

You could try putting the tiller to use, preferably where it will have to work hard to till the ground it unsuccessful you may need a torch and some good old fashion luck to loosen tines from shaft. Now consider this; if the bearings are worn so that the shaft is loose new seals will not hold up and you will risk doing further damage to the worm gear located on rear shaft and possibly other damage to your transmission from contaminated oil.

IF THIS IS A WALK BEHIND TILLER OR FRONT TINE TILLER. THERE SHOULD BE PINS OR BOLTS HOLDING THE TINES ON THE DRIVE SHAFT REMOVE THESE AND PULL THE TINES OFF THE TILLER. THEY MAY GIVE YOU A HARD TIME GETTING THEM OFF SO DON'T GIVE UP. ONCE YOU GET THE TINES OFF YOU SHOULD SEE THE SEALS YOU CAN POP THE OLD ONES OUT WITH A SCREW DRIVER CLEAN OUT THE SOCKETS WHERE THE NEW SEALS WILL GO REPLACE THE NEW SEALS GENTLY WITH A SMALL HAMMER TAPPING THEM IN EVENLY AND TRY NOT TO BEND THE SEAL

http://www.mtdparts.com/webapp/wcs/stores/servlet/OperatorManualView?storeId=10101&catalogId=19502&langId=-1

Go to this website and type in PONY for your model number and find your operator manual by your serial number. The operator manual should have detailed instructions on how to replace your seals.
On the Horse model you remove the wheels and then carefully use a couple of screw drivers to pry out the old seals being careful not to scratch the wheel shaft sealing area. Then polish the wheel shaft with fine emery cloth to remove any sharp edges. Then grease the wheel shafts and carefully slide the new wheel seals on and use a piece of plastic PVC pipe cut square that will slide over the shaft and gently drive the seal to the depth the old seals were installed at. You dont even have to drain the gear oil. Getting the wheels off the wheel shaft is sometimes a problem if they are rusted on. if you can get the wheels off its not to hard to change the seals.

Frank

try looking for tiller model 410 or 420
#215-410-019
the 135202 number is the b&s motor number

That's the engine number. It's a 6Hp Tecumseh. Go on ebay and buy the Troy Bilt parts manuals on CD for Horse Roto Tillers (if that's what it's on). I paid $8. Definitely worth it.

Have you tried soaking the shaft area with either PB Blaster or Deep Creep penetrating oil. Try this for a few days before trying to tackle getting the tine attachment off.

if you have a B&S engine look at the frist two numbers on the code. thats the year of the engine and more likelyof your unit, As long as the motor has'nt been replaced. I'll checked on your serial number did'nt find a model. If this is an old troy built I'll have to call tech support. also I need to know what engine 4, 4.5, 6, 7, 8, hr power, and the name of the teller. MTD now owens troy built.

on my pony the disc came off when i removed all of my tine shafts. then i pulled the old seals out an drove the new ones in

 an new oil seal needs to be put onto the output shaft of the transmission.  remove the plug wire if you attempt to pry out the old seal and tap in the new seal.  Be careful not to damage the case and grease the seal and shaft when you replace the oil seal 

The tines sometimes get frozen to the shaft. You might try penatrating oil and use a heat gun or hair dryer to heat to loosen.
Also tap wiht a hammer around shaft.