Getting ready for exporitory surgery and am gathering my info.
Just trying to get a good understanding of what goes on in there, hopefully it will be something other than the main shaft.

Does the primary bearing race need to come off the mainshaft in order to get the pulley off(if I have to take it off)? And should I be thinking about replacing this?

Does the spacer come right off or is it pressed on to either the pully or the shaft?

The mainshaft & pully have two seals, the quad-seal and a smaller one, the smaller one is called the "5th gear seal", correct?

Should I loosen up the tranny when I reinstall the inner primary so I don't put and side loads on that bearing?..Just a thought from what I've seen in the book and net.

How long is that special socket for the large nut on the pully? Anyone that has one care to measure it, I may be able to borrow a similar one from work if I need it..

A word about the tools, I'm not above buying special tools when needed, heck I still have my impact ball joint forks from my 66 Impala. But when the tools cost more than half the quoted labor rate for a job I hope to not repeat any time soon, I start looking for options.

Thanks
Doug

 

The primary bearing race does not have to come off to remove the pulley but it is pressed on the trans input shaft and WILL have to be replaced in order for the new inner primary seal to work. The puller/installer for that operation is $125, depending on your choice of retailer.

The quad-seal (square o-ring) fits behind the pulley spacer which will likely need to be replaced. The 5th gear seal is the "little one" that presses into the end of the main drive gear. Tool for that install is $50 but doubtful you need to replace that seal. The trans main seal is the big one in the transmission housing and no special tool needed for R&R.

The pulley nut socket is 1 7/8" by 6.75" long overall and the "correct" one comes with a pilot that screws onto the input shaft so it doesn't flop around and round off the thin pulley nut. That socket is $82, again depending on your choice of retailer. You can make one and use it without a pilot. but it can be a bit inconvienant.

You do not, actually, should not loosen the engine or trans when pulling the inner primary. If either or both are disturbed without the inner in place, then one or both needs to be loose when installing the inner so things can shift into a comfortable spot and not put undue stress on the inner housing.

 

The mainshaft and pulley, there is a large seal behind the pulley, the spacer runs inside that seal.

There is also a small seal installed into the end of the main drive gear that seals the space between the mainshaft and the main drive gear, I have seen this seal referred to as a "wedding band seal" which is a pretty good description for it.

You do not have to remove the mainshaft race in order to remove the pulley.

Not sure about the length for the pulley nut socket, but a normal deep socket is not near long enough. Seems like lots of folks fabricate thier own.

Maybe someone will jump in and give you the required length for the socket. Mine is out in the shed, it`s dark and 12 degrees out...

 

Thanks again for putting up with all these questions, & Dan I understand 12 degrees..LOl, it just started snowing here. I just like to understand what I'm dealing with so when something unexpected pops up I can work it out quicker.

Not sure I understand this one, Why do I have to replace the primary bearing race for the new seal to work. Is it because the old race will be worn where the old seat was running or because I'll damage the new seal when I reinstall the primary. Or, what am I missing?

I'm having trouble seeing where this wedding band seal is, looking at my manual. I assume the tool to install it is a collar type affair that seats it to a certain dept. Anyone have a link to that tool, I'd like to take a look.

I know there is a tool for holding the pulley/sprocket while removing the nut, is there another way to hold it, like clamping a 2x4 to it and wedging it on the floor? (Mr. cheap is looking for a way around tools again..lol).

Thanks again, gonna be a couple weeks til I get into this, my daughter is home from college so I'm spending my time there. What a great kid she is-(She likes Sport bikes-go figure)..

Doug

 

Try that one again Doug...

 

The "wedding band seal" is the mainshaft/main drive gear (that the pulley bolts to) seal. That's the one you most likely won't need to replace. Here's the tool for installation with the transmission still assembled:

http://www.georges-garage.com/trans_pre_o7.htm

scroll down to part# 620080

And the inner primary bearing rides on the mainshaft race as well as the inner primary seal and that's why it absolutely should be replaced to insure the inner primary seal can do it's job. It wears a groove and chances of you getting it polished out to satisfaction and/or the the new seal riding in precisely the same groove isn't likely. I mean, that's 3/4 of the job - getting the inner primary off... but again, it doesn't have to come off except to remove the gearset from the transmission housing and you won't be "going there." The tool for the race R&R is on the same page of the above link, part# 620069 and the socket is on that page as well, part# 620030. You do not need the main housing seal driver listed on that page. It'd be nice, but that seal is very easy to install without it. Same holds true for the pulley spacer which is where the trans main seal (the big one) makes contact. It will fit on either way but is not reversible because it has a wedge machined into the inner end that squeezes the "quad-seal" adainst the main housing bearing.

Easiest (cheapest) way to hold the pulley to remove the nut (which is left-hand thread) is to pull the transmssion top cover, remove the shifter drum and put the trans into 2 gears which will lock the main drive gear and allow it to be removed and re-torqued.

If you're looking in the parts manual, some of the seals are shown on the transmission housing page and others are shown on the gearset page...

 

Hackd... I am trying to understand what's going on with Bertha... not trying to argue, just understand. I've read all the posts here several times and I'm not convinced about anything - except that maybe I have a shifter shaft seal leak.

She had leaked several quarter- and half-dollar-sized drops while sitting in the garage for a couple of weeks, which is "normal" for her. Three days ago I wiped the underside and back of the inner primary clean everywhere I could reach (turns out it was just all greasy and not what I would call "wet", despite what I said before...), and then fired her up in the garage. Ran her for about 15-20 minutes to get her good and warmed up everywhere, shifted through the gears several times, then shut her down. She hasn't leaked a drop since, nor does she ever leak until after sitting for a week or so in the garage without being started. She never leaks after rides - until about a week or so later. I would think that if any of my seals are bad, or my pulley nut is loose, she would be leaking onto the floor very soon after being parked after a ride, but she doesn't... it always takes about a week for drips to make it to the floor. I'm confused as to where the leak is really coming from.

 

I can't add any more than I've already posted, as that has been my real life experience (twice) with this particular issue. Anything else would be purely speculative on my part, and of no use to you. Hopefully, in your case, it's another issue.

 

Thanks, Hackd... it's been four days now since I had her running, and not a drop has appeared... even rubbed up under the backside of the inner primary as far as I could reach with a paper towel, and all is still dry. Very weird... I'll check the next time I come back from a reasonably long ride to see if any new stuff appears.

As long as we're in winter now anyway, I will probably take off the primary and replace all the seals and the pulley nut with the JIMS nut as you have suggested here, to get ready for the next riding season and not have to worry about that nut coming loose somewhere!

 

Wait until you see how much money Jim`s wants for the nut...

I think it is made of gold.