I am currently working on a Standard Twin restoration, and I need to find the crankshaft seal that fits on the crankshaft front plate. I think that it is a CR seal, but I am hoping that someone here will have a part number, or know where I might find one. Thanks for any help that you are able to provide.
Standard Twin Seal Question
Posted January 31, 2018 - 11:26 AM
Posted January 31, 2018 - 12:15 PM
what dose the old seal look like? your probably not going to find a part number or find another exact seal. your probably have to have one made or rob one off another tractor.
ps: if you haven't already look in the Manuel section of this sight they have a Manuel over there for a twin.
Edited by Bob White12, January 31, 2018 - 12:18 PM.
Posted January 31, 2018 - 07:55 PM
Give me the bore diameter, shaft diameter, and thickness in thousand's. I had no trouble with the engine seals when I restored mine (about twenty years ago). On the axles, I had to bore the housings to a different bore diameter.
Posted February 03, 2018 - 08:12 AM
I got the old seal off. The inside diameter of the outer lip is a couple thousandths shy of 2.5". The outer lip itself is pretty thick at 0.130". The crankshaft is a 1" shaft and the opening in the center of the seal housing is a bit out of round and varies from 1.025" to 1.032". I am hoping that someone will know what seal it is or know of a seal that will work for this engine.
Posted February 03, 2018 - 11:59 AM
National seals for one inch shaft. Darker numbers are usually what is currently available. National is now branded Timken. Same part numbers.
Posted February 03, 2018 - 04:15 PM
Was the original seal just a piece of cork placed in the retainer that you show a picture of?
Posted February 03, 2018 - 07:46 PM
To be honest, I am not completely sure. The seal was gone when I got the tractor, it was just the retainer. A couple of guys that I know who work on older stuff told me it was most likely either rawhide or leather.