Gearbox input shaft seal

[Stratodisaster]

Anybody replaced front seal on gearbox. Mines leaking and I’m about to tear it down. 09 Norge 6spd. Any tips tricks or warnings appreciated

[1down5up]

Here is a great resource....

https://www.thisoldtractor.com/guzzitech.dk/pdf/gearbox-rebuilding-john-noble_print.pdf

and since your that deep at a minimum you should prob be looking at changing your Engine output seal and possibly refreshing your clutch

[Stratodisaster]

Here is a great resource....

https://www.thisoldtractor.com/guzzitech.dk/pdf/gearbox-rebuilding-john-noble_print.pdf

and since your that deep at a minimum you should prob be looking at changing your Engine output seal and possibly refreshing your clutch
Did that a couple of months ago. Musta had two leaks was leak pretty good around cam plug today I tore it down and best I can tell it’s leaking around clutch rod seal/bushings. Now if I can remember which way they came out. I think large end toward motor

[Stratodisaster]

My nose don’t work so good anymore but after lunch I tasted it and it’s definitely gear oil taste like chicken

[malik]

The seals on the clutch push rod can be a problem. Did you replace them last time with the four o-rings recommended for the big blocks? The mechanical gurus have often advised me in such work that "if you can see a seal, replace it".

[Stratodisaster]

The seals on the clutch push rod can be a problem. Did you replace them last time with the four o-rings recommended for the big blocks? The mechanical gurus have often advised me in such work that "if you can see a seal, replace it".

  no I didn’t I didn’t take the slave cylinder or pushrod out. It’s confusing because I think there’s something lost in translation. Parts fiche calls the 2 conical seals bushings and shows a 3rd but it’s actually a metal bushing that goes in end of input shaft.

[Rolf Halvorsen]

My best guess is that it is the 2 conical seals that are leaking - and NOT the front seal.

[Rolf Halvorsen]

And you should polish the push-rod in the area where it seals against the conical seals.

[Old Jock]

Just a quick clarification

When I made the gearbox article up, it was for a 5 speed box and your's is a 6 speed.

I've never dug into a 6 speed box so no clue what they are like

That's why I didn't comment on the thread, it would be nice if the article helps but just remember you set up may well be totally different

John

[Stratodisaster]

slika

My best guess is that it is the 2 conical seals that are leaking - and NOT the front seal.

. I think your right now that I’ve taken it apart. The manual shows 3 bushings 2 rubber and one metal that goes in the input shaft and makes it sound like all 3 come out easily. I see what looks like a pressed in bushing in input shaft but I’m wondering if there’s something missing the rod is pretty loose in shaft

[Stratodisaster]

Item 3 is the one in question

[guzzisteve]

I would take it all apart 1st, #3 is in the shaft and stays there and doesn't come out when you pull rod out. Only the 2 rubber cups. All speculation till you get the trans out. AND it does not crab like a Tonti frame.

[Dave Swanson]

Stratodisaster.  Pete Roper has offered his assistance in this matter.  I highly recommend contacting him at  motomoda.roper@gmail.com

[Stratodisaster]

I’ve got it out and apart what’s throwing me off is the service manual makes it sound like there’s 3 pieces beside rod that comes out easily. I’m trying to figure out if book is wrong or I’m missing a piece. The rod is pretty loose in shaft don’t know if that’s correct or if item 3 in picture above is missing

[Dave Swanson]

I’ve got it out and apart what’s throwing me off is the service manual makes it sound like there’s 3 pieces beside rod that comes out easily. I’m trying to figure out if book is wrong or I’m missing a piece. The rod is pretty loose in shaft don’t know if that’s correct or if item 3 in picture above is missing

Please contact Pete.   He knows as much about the 6 speed as anyone on the planet.  And check your PM. 

[guzzisteve]

I've had more than 10 apart , contact Pete on Ghetto, he may have a video on this. Scratch #3 it is not rubber and the shaft is loose cause you removed the throwout that it rides in, thats all. I'd change front seal, oring on shaft & rubber cups.

[Stratodisaster]

The shaft was loose before I took bearing out all that was on rod was the two conical rubber bushings. I’m trying to figure out if something either got lost taking it apart or was already missing. It looks like there should be something on the input shaft to support rod.

[Rolf Halvorsen]

The sealing function is taken care of by the two conical seals (identical with the 5-speed versions).

The small steel tube (ring) on the other end is roughly to center the push rod, before the gearbox is assembled to the engine.

The small front pressure part of the clutch (I do not know its name), will center the push rod.

The push rod should NOT be tight against the small steel tube.

The earlier 6-speed gearboxes had another design - using a standard small seal (simmerrring) to prevent oil from comming into the clutch area.

[Rolf Halvorsen]

The conical seal - has a big diameter and a small diameter.

When you assembly this cobical seal - remember the big diameter in first.

[Stratodisaster]

Thanks for all the replies. I was wanting to make sure there wasn’t something missing. I wouldn’t have given it a second thought except for the instructions in service manual to “collect” the front bushing. Sounds like something that could just fall out.                                                            Is it pretty common for those to leak or maybe I did something to cause it to start leaking when I had it out fixing the cam plug? I at first thought it was leaking and I didn’t notice but I think not because it’s wet in different places than before