Thanks wd4ity, your instructions helped. I checked everything. But after changing 4 seals of different makes, its still leaking after a quick run round the block. The leak is not as bad but get a small...
Ok, usually when I give information on things like that, I tell them everything that I know so that they get their problem fixed the first time. I don't allot it out piece at a time. So, undoubtedly, there is something amiss here, not just the normal leaky seal.
If you are positive that the leak in coming from the backside of the inner primary at the mainshaft. There is a starter seal up just a bit higher that can leak as well. You should have already checked the inner bearing race position on the mainshaft, 0.100" from the face of the final drive gear and that the race is between 0.9950" and 1.000" (25.27-25.40mm) long. The race is free of burrs and deep scratches. The new seal should have a tension of about 0.5mm (0.020") between the seal and the bearing race. If you measure the inside of the seal with a caliper and then measure the outside of the race, the race should be a bit larger than the seal.
When you installed the seal, did you inspect the recess where the seal goes in to make sure there are no cracks? Did you use the sealer on the outer edge of the seal ( I like non-hardening Permatex) and lubricate the seal where the bearing race runs with Lubriplate or oil. When you install the seal, make sure the lip of the seal where the bearing race runs is pointed INWARDS towards the clutch, not the trransmission. The "Lip" of the seal always faces against the direction of oil flow and is seated about 0.050" below the surface of the backside of the primary. The seal must be straight as well. If you get it in crooked in won't seal. If you can't get an OEM seal, try to order a James Gaskets seal.
Double sealing does no good as no oil gets to the outer seal and it burns up very quickly even if you pack grease between the seals. This used to be used on the old Shovelhead with the sealed bearing. It does keep dirt away from the seal though.
Now, it still sounds to me like it's your quad seal behind the front drive pulle. The quad seal keeps the transmission lubricant from running underneath the spacer behind the front pulley and then down between the front pulley splines and the final drive gear. When it drips off, it will drip onto the mainshaft and run down the backside of the inner primary.
Next time you have the inner primary off, take the lock plate off the front pulley and check the large nut. If it's loose, this could be your problem. Usually the nut is loose enough to turn it by hand. It has left handed threads in the nut. The front pulley is made of cast iron and is softer than the final drive gear. This is by design so that the relatively simple and cheap to replace front pulley wears instead of the expensive final drive gear. Without taking the final drive belt off, you probably won't feel any movement in the front pulley.
Well, I hope this helps again. For the life of me, that's all I can thnk about. I've even included some information that I never check in most cases, like the length of the inner race.
Good Luck and Ride Safe
Jan 18, 2011 |
2004 Harley Davidson FXSTD - FXSTDI...