Hey TT gurus..
What goes into these holes on the axels? The one on the right had a bolt in it that was smaller than the threads so it was just acting as a plug!
Grease cups !
Now, I wondered about that.. Thinking it was an obvious choice.. Yet I read somewhere that these areas are lubricated by the oil in the rear end?
Negative. There should be a seal between those bearings and the rest of the axle housing. I imagine they were felt originally. Not sure. Mine were missing. However they do make a modern lip seal that will fit in there, then the bearing which is supposed to be packed with grease, then the outer seal set up. I didn't see any modern seals offered for the outer seal, so I got what they had. It is a washer, a felt and an outer cup to hold it all in.
Make sure the grease cup holes line up with the hole in the bearing sleeve too - or the grease won't get to the bearing.
Some modern replacement sleeves are missing the grease hole, and also are missing the "dimples" that locate in the hole you will see on the end of the axle housing (facing to the front on both sides - grease hole face to back). The dimples are important to prevent the sleeve rotating and blocking off the grease hole.
Interesting again, Adrian.. I was wondering what the hole with the dimple in it was for... Makes sense.. they are lined up well.. I am surprised it did not hit me right away!
Kind of like a Gary Larson cartoon... "What the hey?)