Clutch fluid loss - Page 2 - Ducati.ms - The Ultimate Ducati Forum
Reply
 
LinkBack Thread Tools Display Modes
post #11 of 25 (permalink) Old Jun 12th, 2019, 7:27 pm Thread Starter
Junior Member
 
Join Date: Nov 2018
Location: Philadelphia, PA, USA
Posts: 16
Garage
Quote:
Originally Posted by Iwannaduc View Post
^^^This. If your slave cylinder is leaking, you may not see any fluid. Particularly if the rubber accordion like boot is in place and intact, fluid will build up in it, and work it's way out around the push rod or any kind of a hole. As the slave is just above and forward of the countershaft sprocket, fluid can leak out onto the chain. Once it starts doing that, you won't notice it because only a little leaks out at a time. The chain, then carries it away to get flung off onto the rear wheel and underside of the hugger and undertail.

The oring on the push rod doesn't have anything to do with clutch fluid retention. The push rod goes through the lay shaft and the orings simply seal that opening....sean
Got the fairings off after dinner. From clutch lever to the slave cylinder bike is dry as a bone. See images below - which I think support what Iwannaduc and Belter suggested. The second photo seems to show schmutz behind the clutch/slave cylinder. I could pick up a fair amount of "oil"/fluid with my finger.

New cable from Galfer ordered. Also went ahead with the Oberon SC. New experience coming up. Should be doable with patience,LT Snyder book and some luck. And this forum....

Thanks for info so far.
Attached Thumbnails
Click image for larger version

Name:	DSCF9047.JPG
Views:	22
Size:	4.17 MB
ID:	945753   Click image for larger version

Name:	DSCF9049.JPG
Views:	23
Size:	4.04 MB
ID:	945755  

96 900SS
Luftgekult is offline  
Sponsored Links
Advertisement
 
post #12 of 25 (permalink) Old Jun 13th, 2019, 7:58 am
Senior Member
 
steveb64's Avatar
 
Join Date: Aug 2012
Location: Whangarei, , New Zealand
Posts: 2,446
Garage
Images: 2
While you're working on one end of your clutch, now would be a good time to pull the cover off, and remove the pressure plate, and check the bearing in that.

Also - a word of caution re the Oberon slave. They seem to be designed primarily for the i.e. bikes, and need a spacer for the pushrod on the carbies. Mine was supplied without one... I managed to sort of fake it, and get it working - but have since found an alternative to the spacer. It turns out that the difference between the carby and injected clutch pushrods, is down to the 'hat' that sits over the end of the pushrod, and fits into the bearing on the pressure plate. So - if your new slave doesn't have the spacer - there's the fix.
RockAZ likes this.

'95 900 Superlight IV #064

Mods are: K&N filter, airbox lid on with rubber trumpets removed, MBP collets, full SMI (SilMoto Italia) spaghetti exhaust with 'open' carbon cans, 41mm FCR's - #182 mains!, Barnett alloy clutch basket, Oberon slave cylinder, Ohlins fork springs, Ohlins rear shock, Verlicchi swingarm.
steveb64 is offline  
post #13 of 25 (permalink) Old Jun 13th, 2019, 6:58 pm Thread Starter
Junior Member
 
Join Date: Nov 2018
Location: Philadelphia, PA, USA
Posts: 16
Garage
Quote:
Originally Posted by steveb64 View Post
....a word of caution re the Oberon slave.
Good to know -thanks for the tip - I'll contact the vendor (in my case Motowheels) and see if they can confirm if they ship the part with the Oberon. Learning curve steep.

96 900SS
Luftgekult is offline  
 
post #14 of 25 (permalink) Old Jun 13th, 2019, 9:24 pm
Senior Member
 
Join Date: Jul 2018
Posts: 877
all the oberons i've ever bought have had the spacer.

i still find replacing the seal in the original slave and giving the bore a good linish is a perfectly acceptable result. it's lack of use and fluid changes and the bellows behind the slave that do the damage here imo.

check the bearing in the pressure plate, and check that the hub isn't worn at the big star washer. with the cover off and clutch assembled, pull the lever in and see if the springs caps out move with the pressure plate in the first part of the lever travel. if they do, adding another star washer is a good fix. or two - i added two to a bike this week.

know all wanker
belter is online now  
post #15 of 25 (permalink) Old Jun 23rd, 2019, 4:39 pm Thread Starter
Junior Member
 
Join Date: Nov 2018
Location: Philadelphia, PA, USA
Posts: 16
Garage
It was a simple plan.... Buy the Galfer clutch cable and the Oberon slave cylinder (from MotoWheels) Anodized Red (CLU-0116 - I-10 / I-11.1-CLU-0116), and get the bike back on the road. Today start working on it. Couple issues leading to questions:
(1) operational side of the Oberon looks different than the Ducati part I removed. Did I errantly buy the wrong Oberon clutch slave cylinder for by 900?
(2) the rubber bellows/gasket looks toasted. Possibly that was source of slow leak? Do I need to replace that bellows like gasket if using the Oberon.
(3) can anyone tell from the photo if the included "extension rod" blurred, in third image, is required. Suppose I just need to measure the rod sticking out of the clutch - and as long as this is 30mm, I would NOT require the extension rod, correct?
4) Last image shows residual fluid from slave - fluid was due to be changed.

I am also following a recent thread by Rex Coil 7 - that is also discussing 900 SS slave cylinders.

Thanks in advance for any tips or comments.
Attached Thumbnails
Click image for larger version

Name:	DSCF9153.JPG
Views:	19
Size:	3.61 MB
ID:	946701   Click image for larger version

Name:	DSCF9156.JPG
Views:	17
Size:	3.47 MB
ID:	946703   Click image for larger version

Name:	DSCF9159.JPG
Views:	16
Size:	3.40 MB
ID:	946705   Click image for larger version

Name:	DSCF9163.JPG
Views:	16
Size:	3.90 MB
ID:	946707   Click image for larger version

Name:	DSCF9158.JPG
Views:	18
Size:	3.84 MB
ID:	946709  


96 900SS
Luftgekult is offline  
post #16 of 25 (permalink) Old Jun 23rd, 2019, 5:26 pm
Senior Member
 
Iwannaduc's Avatar
 
Join Date: Jul 2006
Location: Fairfield , Nor Cal,
Posts: 750
Garage
The bellows are just there to keep chain lube and what ever else gets flung by the chain off of the push rod. That's it. No fluid retention or anything technical like that. Replacing it is a good idea to keep crap out of there but you can just reuse what you have until you buy a new one.

The Oberon IS different to the stock slave cylinder. Don't let the different look fool you, it will still work. As for the extension rod, the Oberon instructions say something like "if you need it, use it" and that's pretty much what I was told when I bought mine.

That said, the instructions for the EVR slave that I got state clearly that any Pre-2001 bike needs the extension.

Just judging from how crap the old fluid looks, I'd definitely get the clutch basket side off and have a look at the bearing in the pressure plate. Make sure it still moves freely and without any notchiness. A new one might be in order if you find that. Take the time to clean out the "hat" the push rod inserts into. There is a viton o-ring in there that should be kept clean and lubricated.

Hope all of that is of some help.....sean

Quote:
My garage: Twins:2000.5 Mille R, 2000 996, 1994 EX500 basket case 1993 900SS. Suzukis: 2004 GSXR600, 1992 GSXR750 oil boiler, 1983 XN-85 Turbo

Last edited by Iwannaduc; Jun 23rd, 2019 at 8:13 pm.
Iwannaduc is offline  
post #17 of 25 (permalink) Old Jun 23rd, 2019, 5:49 pm Thread Starter
Junior Member
 
Join Date: Nov 2018
Location: Philadelphia, PA, USA
Posts: 16
Garage
Helpful - re: the bellows rubber piece. will check the other side. Good tip.
The Oberon instructions state ..."* included in the kit is an extension rod (pre 2000 Ducati models), and should be fitted ONLY if the pushrod length is less than 30mm." Back to the garage....

96 900SS
Luftgekult is offline  
post #18 of 25 (permalink) Old Jun 24th, 2019, 10:21 am
Senior Member
 
Join Date: Jun 2012
Posts: 760
I got a Yoyodyne slave and the bellows is not used with it. I think it only fit with the stock slave cylinder.
spacey is offline  
post #19 of 25 (permalink) Old Jun 25th, 2019, 8:21 am
Senior Member
 
steveb64's Avatar
 
Join Date: Aug 2012
Location: Whangarei, , New Zealand
Posts: 2,446
Garage
Images: 2
Quote:
Originally Posted by Iwannaduc View Post
The bellows are just there to keep chain lube and what ever else gets flung by the chain off of the push rod. That's it. No fluid retention or anything technical like that. Replacing it is a good idea to keep crap out of there but you can just reuse what you have until you buy a new one.

The Oberon IS different to the stock slave cylinder. Don't let the different look fool you, it will still work. As for the extension rod, the Oberon instructions say something like "if you need it, use it" and that's pretty much what I was told when I bought mine.

That said, the instructions for the EVR slave that I got state clearly that any Pre-2001 bike needs the extension.

Just judging from how crap the old fluid looks, I'd definitely get the clutch basket side off and have a look at the bearing in the pressure plate. Make sure it still moves freely and without any notchiness. A new one might be in order if you find that. Take the time to clean out the "hat" the push rod inserts into. There is a viton o-ring in there that should be kept clean and lubricated.

Hope all of that is of some help.....sean
The extension rod is needed as the Oberon slave is actually designed primarily for the ie clutch rods, which are slightly longer overall than the carbie ones. However - the extra length is in the above mentioned 'hat', which has a different length hole for the pushrod between the carbies, and the ie's. My Oberon turned up minus the extension, and while I did manage to get the clutch to work - it wasn't at it's best. Once I figured out the trick with the hat, it sorted out several problems.

I reused the rubber boot off the original slave on mine - it's pretty stuffed, and isn't doing much, but it keeps some of the rubbish away. Theoretically, the Oberon design negates the requirement for the boot, but...

'95 900 Superlight IV #064

Mods are: K&N filter, airbox lid on with rubber trumpets removed, MBP collets, full SMI (SilMoto Italia) spaghetti exhaust with 'open' carbon cans, 41mm FCR's - #182 mains!, Barnett alloy clutch basket, Oberon slave cylinder, Ohlins fork springs, Ohlins rear shock, Verlicchi swingarm.
steveb64 is offline  
post #20 of 25 (permalink) Old Jun 25th, 2019, 8:15 pm Thread Starter
Junior Member
 
Join Date: Nov 2018
Location: Philadelphia, PA, USA
Posts: 16
Garage
...the banjo bolts provided were course threaded, and did not fit the master cylinder. Called Galfer and they shipped out the correct ones. I fit the original banjo bolt but struggled to get clutch fluid to flow. I may not have been using the Mityvac correctly so its back to the garage to sort it out. If I can't do this job, I'm doomed.....

The Oberon is well made - the tolerances to fit were tight but there were zero issues, I reused the rubber boot on the inside and the extension rod as well. Thanks to all for feedback on those points.

Still have to get to the other side and look at the clutch pack, springs etc. That will be a first too.... have to admit, do enjoy the challenge of wrenching on this bike. One step at a time, but if I can fix the clutch will replace the brake lines.

96 900SS
Luftgekult is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ducati.ms - The Ultimate Ducati Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome