YARDMAN EARTHBIRD 4HP TILLER 1970 model 5020-1

upupandaway said:
If you look at the seal, somewhere you will find info on what type of seal you have. If no luck, do a google maps search for "bearing" and those shops can either find the part # or else find a seal that fits your tiller. They can find one that fits with just the shaft size and the outer diameter.
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outer rubber on seal ruined so no numbers and trying to get exact OD was difficult due to shaft still in and getting calipers in there..Guy at vendor concurred with me on the 1.42 or 1.4387 size.thanks
 
Found a old thread dating back to 2013 here and ending in 2016.Oil seal numbers listed for National Seals.472311 for tines..254270 for back pulley shaft seal.Wish I dig deeper here but,o well..guy says it is the same tiller as an IH 526.
 
National Seals specs.

472311 Nitrile Oil Seal - Solid, 1.000 in Shaft, 1.441 in OD, 0.250 in Width, 47 Design, Nitrile Lip Material
254270 Nitrile Oil Seal - Solid, 0.750 in Shaft, 1.129 in OD, 0.188 in Width, 25 Design, Nitrile Lip Material
 
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