PROGRESS REPORTS

Transmission Seal

The sprocket retaining nut has obviously been abused by using a chisel to remove and install it. I will be replacing it with a "SuperNut" anyway so I also used a chisel to remove it.

After removing the nut and sprocket I left the transmission sitting on the bench for day and when I came back it was obvious that the mainshaft seal is leaking.

So I adapted my puller that I had made for pulling the clutch hub. There are three holes that allow me to run some sheet metal screws into the seal then there are three tapped holes for jack screws to pull the seal out of the housing.

After removing the seal and cork.

The sprocket spacer (that the seal seals on) was obviously worn so I replaced it.

I have read a couple of places where it states that the seal should be about .050 below the surface of the trans. housing. The spare parts manual also shows that there is a cork behind the seal. When I stacked up the measurements of the seal thickness and the cork thickness it put the outer face of the seal flush with the trans. housing. This configuration would also have put the outer lip of the seal over the keyway notch.

I didn't like this arrangement so I left the cork out. This allows the seal to seat deeper in the housing and keeps the outer lip out of the keyway notch.

Also, the key that you see in the pic below was not originally set up this way. The key is shaped like a capital "L" and it was originally installed so that the long leg was parallel with the axis of the mainshaft and the short leg was perpendicular to the axis and engaging the keyway notch in the spacer. When I put it back in that way it did not appear that the short leg was sticking up into the notch far enough so I changed it. What you are looking at in this pic is the long leg of the "L" shaped key.

I don't know if this is going to come back to haunt me later or not. It appears that it should work OK as the seal doesn't work its way out. If it does then the outer lip is going to get chewed up.

Here is the "SuperNut" that replaces the buggered up nut on the right. It has a seal in it that seals on the smooth part of the mainshaft that is just visible on the right of the pic above.

Here it is all put back together (except for bending over the tabs to lock the nut). No more leaks - I hope.

End of report.

This page last updated on December 18, 2006