swing arm/pushrod seal question

[ahoward125]

Just pulled the swingarm off the EV in order to deal with the gear oil that is dripping from the bellhousing. (thank you all for the excellent advice)
I am beginning to wonder if the person who serviced the bike for me might have overfilled the transmission.

How much gear oil should dump out when I pull the swingarm off? I got 175cc in my old ratio-right cup and I missed a bunch in my fumbling to grab the cup and put it under the gear oil pouring out of the swingarm.

the bike is sitting level...

I think I will drain the trans and refill with .75l of gear oil.

Any thoughts?

[pehayes]

How much gear oil should dump out when I pull the swingarm off?

There shouldn't be any gear lube loss when you pull the swingarm.  There shouldn't be any  more than a few drops in the cardan joint bellows boot.

Did you perhaps tilt the swingarm forward so that the u-joint was now below the rear bevel drive?  In that case, you may have poured gear lube forward out of the bevel drive and now that component needs fluid volume confirmation.  There is not a seal at the front of the bevel box and if you don't keep it all level then bevel box lube will pour forward.

Nothing should come out of the transmission as there is an output shaft seal.  Yes, it would be possible to lose gear lube out of the input shaft, ouput shaft, or throwout shaft if the gear box had been overfilled.

Patrick Hayes
Fremont CA

[ahoward125]

There shouldn't be any gear lube loss when you pull the swingarm.  There shouldn't be any  more than a few drops in the cardan joint bellows boot.

Did you perhaps tilt the swingarm forward so that the u-joint was now below the rear bevel drive?  In that case, you may have poured gear lube forward out of the bevel drive and now that component needs fluid volume confirmation.  There is not a seal at the front of the bevel box and if you don't keep it all level then bevel box lube will pour forward.
Nothing should come out of the transmission as there is an output shaft seal.  Yes, it would be possible to lose gear lube out of the input shaft, ouput shaft, or throwout shaft if the gear box had been overfilled.

Patrick Hayes
Fremont CA

I didn't tilt the bike forward that I know. It is on the centerstand, which is on a block of wood. I pulled the bevel box off, and made sure I didn't tilt it forward as I did. I only pulled the swing arm back to get it off the spline and gear oil came pouring out.

[Tom H]

I'm not clear on where the oil came pouring out of. The end with the U joint boot or the end where the rear drive is bolted to?

If it was the U joint end, sounds like a leaky rear trans seal. If it was the rear drive, maybe??? the rear drive was way overfilled.

Tom

[ahoward125]

Regardless I will replace the seal on the clutch pushrod...
How the heck do you get it out? I pulled the plunger, and there is a bearing inside the trans with no way to work it out.
a big magnet?
tired of this already...

[guzzisteve]

Yes, magnet or a dental pick, same w/rubbing washers. Then there is the piece the rod goes in to, then rod.

[ahoward125]

Ok, I may have to run to the hardware/autoparts store to get one because mine has vanished... 

[Don G]

Pick up your favorite beverage to enjoy whilst enjoying the task, it should be enjoyed not endured!   DonG

[ahoward125]

So...
while pulling out the thrust bearing thing, the pushrod came out..

That is bad, isn't it?
Like remover the transmission bad?

[Don G]

Nah,carry on your on the right track.  DonG

[pehayes]

So...
while pulling out the thrust bearing thing, the pushrod came out..

The entire 12" or so?
Does it have any seals on the shaft?  The factory originals were two rubber cones with the wide end facing forward.  Many people have substituted a set of 6 o-rings in place of the two factory seals.  If they didn't come off with the rod,  you will have to reach in with a long wire with a  hook bent on the end to fish the old ones out.

Now, if all of that oil came out of the rear of the transmission then you have an issue with the output shaft seal and that is even a lot less fun to exchange.

Is there ANY wear to the surfaces of the two race washers which sandwich the radial thrust bearing?  The hardening does not go very deep on those surfaces.  Any indication of wear means replacement.  40K miles of history means replacement.

Patrick Hayes
Fremont CA