Hydraulic Clutch Fluid Issue

Ron1000 · 26-03-2022, 08:52 AM

More weirdness.

open source screen capture

I can’t get the two indents to meet now. Which is weird as that inner machined part was easy to rotate yesterday, now it’s solid. I’ve tried a reasonable amount of force and it won’t budge.

Which essentially means the push rod isn’t at the ‘correct’ rotation. Does that matter? Seems like it does to me!

Can’t decide wether to run it as is or just order a new (non oberon) clutch slave. And use one of my other bikes in the mean time.

Mr Gazza · 26-03-2022, 09:21 AM

I think there is something quite wrong with slave now, they shouldn't turn like that.
I also think that there could very well be something wrong with the pusrod, or rather that the thrust bearing in the pressure plate is siezed or very stiff.

I wouldn't be putting it back like that if it were mine.
First call would be to Oberon to see if they have come accross this before and to see if they can throw any light on it. As the inner has turned in the body it could well have damaged a seal or scored the mating surfaces, which would presumably be an interferance fit. Swarf or grit could be the reason why you can't turn it now?

I would also be tempted to start the motor in neutral and see if I could stop the pushrod from turning, maybe gently with some pliers padded with masking tape to try and not damage the pushrod. I shouldn't really be suggesting that on a public forum as it could be potentially dangerous if you happened to catch the anti-rotation pin and the rod actually was seized in the bearing, so please procceed with caution at your own risk!

I have heard some good stories about Oberon, so a meek approach for advice might possibly get a good response.

P.S. Don't take the p!ss, I typed this entire post witout the aid of a spellchequecer

Ron1000 · 26-03-2022, 09:31 AM

Ok so evo parked up until i speak to Oberon and buy and new clutch slave any (non-Oberon) alternatives you guys recommend?

The push rod turns by hand easily i done that last night.

Mr Gazza · 26-03-2022, 09:49 AM

I'd still be tempted to try and hold the pushrod while the engine is running, just to prove that there's no tight spots or if it grabs at any point.. With the above caveats of course. It might be that it only grabs and turns when the clutch lever is in and the pressure is on?

I've used an Oberon myself for many thousands of miles and so I would reccommend one, but if they came back with an unhelpful response from an enquiry about an issue like yours I would buy a FactoryRacing one.

Good luck..

Ron1000 · 26-03-2022, 10:05 AM

The plot thickens.

I’ve taken the clutch slave off again to check the push rod and this is what if find. Mind it’s not been started or ran from putting it back together earlier. (Pushrod rotates easily on both directions by hand with engine off and in neutral and with the bike running and in neutral. Can’t test it in gear.

screenshot windows 7

So the inner part that tight just fell out on removal. The inner part is actually threaded into the outer part. When i screw them back in together the indents are in the wrong position as you can see. Something catastrophic has happened I’m being to suspect a thrust bearing issue. I might have only done temporarily then freed itself off again. Dunno dunno dunno.

Luddite · 26-03-2022, 10:24 AM

Don't write off the cylinder just yet!

I think the problem may be that it's still connected and the piston will have eased out a few millimetres making it difficult for you to screw the cap on.

Ideally, you should remove the slave completely but, if you don't want the extra hassle of bleeding, try this in situ first.

Try to push the piston back into the body as far as possible, (making sure your reservoir isn't going to overflow when you push the piston back in), and then try to refit the back plate.

If that fails, I'd definitely get in touch with Oberon.

Good luck!

Ron1000 · 26-03-2022, 10:43 AM

Quote:

Originally Posted by Luddite

Don't write off the cylinder just yet!

I think the problem may be that it's still connected and the piston will have eased out a few millimetres making it difficult for you to screw the cap on.

Ideally, you should remove the slave completely but, if you don't want the extra hassle of bleeding, try this in situ first.

Try to push the piston back into the body as far as possible, (making sure your reservoir isn't going to overflow when you push the piston back in), and then try to refit the back plate.

If that fails, I'd definitely get in touch with Oberon.

Good luck!

I’ll have one last play about with it and completely remove it, I don’t mind bleeding it up again. Pretty easy. I’ll defo phone Oberon on Monday.

Luddite · 26-03-2022, 10:34 AM

Quote:

Originally Posted by Ron1000

Which essentially means the push rod isn’t at the ‘correct’ rotation. Does that matter? Seems like it does to me!

PS I don't think it matters at what position the pushrod sits as, without the slave, it's free to rotate at both ends. As long as the anti-rotation pin is engaged, it'll be ok.

Ron1000 · 26-03-2022, 10:44 AM

Quote:

Originally Posted by Luddite

PS I don't think it matters at what position the pushrod sits as, without the slave, it's free to rotate at both ends. As long as the anti-rotation pin is engaged, it'll be ok.

That’s good to know.

I’m off for a blast…on the streety…was supposed to be predominantly using the evo this season too

Luddite · 26-03-2022, 10:54 AM

Quote:

Originally Posted by Ron1000

…was supposed to be predominantly using the evo this season too

And I'm sure you will!

If you can't get it sorted straightaway, (if you have to send the slave back to Oberon for a refurb for example), I'm happy to lend you my OE slave to keep you on the road.

26-03-2022, 09:21 AM	#2
Mr Gazza Lord of the Rings Join Date: May 2013 Location: Norwich Bike: M900sie Posts: 5,834	I think there is something quite wrong with slave now, they shouldn't turn like that. I also think that there could very well be something wrong with the pusrod, or rather that the thrust bearing in the pressure plate is siezed or very stiff. I wouldn't be putting it back like that if it were mine. First call would be to Oberon to see if they have come accross this before and to see if they can throw any light on it. As the inner has turned in the body it could well have damaged a seal or scored the mating surfaces, which would presumably be an interferance fit. Swarf or grit could be the reason why you can't turn it now? I would also be tempted to start the motor in neutral and see if I could stop the pushrod from turning, maybe gently with some pliers padded with masking tape to try and not damage the pushrod. I shouldn't really be suggesting that on a public forum as it could be potentially dangerous if you happened to catch the anti-rotation pin and the rod actually was seized in the bearing, so please procceed with caution at your own risk! I have heard some good stories about Oberon, so a meek approach for advice might possibly get a good response. P.S. Don't take the p!ss, I typed this entire post witout the aid of a spellchequecer __________________

26-03-2022, 09:49 AM	#4
Mr Gazza Lord of the Rings Join Date: May 2013 Location: Norwich Bike: M900sie Posts: 5,834	I'd still be tempted to try and hold the pushrod while the engine is running, just to prove that there's no tight spots or if it grabs at any point.. With the above caveats of course. It might be that it only grabs and turns when the clutch lever is in and the pressure is on? I've used an Oberon myself for many thousands of miles and so I would reccommend one, but if they came back with an unhelpful response from an enquiry about an issue like yours I would buy a FactoryRacing one. Good luck.. __________________ Last edited by Mr Gazza; 26-03-2022 at 09:52 AM..

26-03-2022, 08:52 AM	#1
Ron1000 Registered User Join Date: Jun 2015 Location: Livingston Bike: M1100evo Posts: 863	More weirdness. open source screen capture I can’t get the two indents to meet now. Which is weird as that inner machined part was easy to rotate yesterday, now it’s solid. I’ve tried a reasonable amount of force and it won’t budge. Which essentially means the push rod isn’t at the ‘correct’ rotation. Does that matter? Seems like it does to me! Can’t decide wether to run it as is or just order a new (non oberon) clutch slave. And use one of my other bikes in the mean time.

26-03-2022, 09:31 AM	#3
Ron1000 Registered User Join Date: Jun 2015 Location: Livingston Bike: M1100evo Posts: 863	Ok so evo parked up until i speak to Oberon and buy and new clutch slave any (non-Oberon) alternatives you guys recommend? The push rod turns by hand easily i done that last night.

26-03-2022, 10:05 AM	#5
Ron1000 Registered User Join Date: Jun 2015 Location: Livingston Bike: M1100evo Posts: 863	The plot thickens. I’ve taken the clutch slave off again to check the push rod and this is what if find. Mind it’s not been started or ran from putting it back together earlier. (Pushrod rotates easily on both directions by hand with engine off and in neutral and with the bike running and in neutral. Can’t test it in gear. screenshot windows 7 So the inner part that tight just fell out on removal. The inner part is actually threaded into the outer part. When i screw them back in together the indents are in the wrong position as you can see. Something catastrophic has happened I’m being to suspect a thrust bearing issue. I might have only done temporarily then freed itself off again. Dunno dunno dunno.

26-03-2022, 10:24 AM	#6
Luddite Registered User Join Date: Aug 2011 Location: Southampton Bike: M1100evo Posts: 2,465	Don't write off the cylinder just yet! I think the problem may be that it's still connected and the piston will have eased out a few millimetres making it difficult for you to screw the cap on. Ideally, you should remove the slave completely but, if you don't want the extra hassle of bleeding, try this in situ first. Try to push the piston back into the body as far as possible, (making sure your reservoir isn't going to overflow when you push the piston back in), and then try to refit the back plate. If that fails, I'd definitely get in touch with Oberon. Good luck!