Ducati Sporting Club UK
 
 
Thread Tools Search this Thread Display Modes
  #1  
Old 10-May-2006, 22:54
Douglas Douglas is offline
Registered Forum User
Mille
 
Posts: 118
Join Date: Jul 2005
Dirt in clutch hydraulics

I have just put my 748 back on the road, and the clutch slave cylinder started to leak. When I put the new seal in I noticed that the fluid and cylinders were dirty, presumably having worked its way through the slave cylinder.

The new seal is working fine, so far, but I notice that despite cleaning and purging the system thoroughly the fluid in the master cylinder resevoir is dirty again. However I was in DKs showroom yesterday and they had several 748/996's in stock, and I noticed that most of them had dirty fluid too!

So the question is the dirt a factor in causing the system to leak, and is dirt ingress normal? Finally is there anything that can be done to reduce it?
Quote+Reply
  #2  
Old 10-May-2006, 23:10
zhed44's Avatar
zhed44 zhed44 is offline
Registered Forum User
500SD
 
Posts: 741
Join Date: Apr 2005
Mood: YELLOW!!!
I can't answer your question, but I flushed and replaced my fluid 3 weeks ago and it's already going brown again. The slave cyl gaiter was knackered, so it may be letting dirt get in which has been flung off the front sprocket/chain into that area. I'm going to change the piston and the gaiter just as soon as I get an hour or 2 free.

The clever people will be along in a minute to give you a proper answer
Quote+Reply
  #3  
Old 10-May-2006, 23:31
rockhopper's Avatar
rockhopper rockhopper is offline
Registered Forum User
Ducati Corse
 
Posts: 3,367
Join Date: Jul 2001
They all do that sir!

Doesn't appear to make any difference though so don't worry about it.
Quote+Reply
  #4  
Old 10-May-2006, 23:32
Fordie's Avatar
Fordie Fordie is offline
Regional Organiser - BHCN
Ducati Corse
 
Posts: 3,276
Join Date: Aug 2001
Mood: Raring to Ride
One thing to look at is the pressure plate bearing if its knackered the push rod could spin and damage the cylinder seal . 4D
Quote+Reply
  #5  
Old 10-May-2006, 23:33
Shazaam!'s Avatar
DSC Member Shazaam! Shazaam! is offline
DSC Club Member
Big Twin
 
Posts: 1,167
Join Date: Nov 2001
http://www.ducatisportingclub.com/xm...=3508#pid31803
Quote+Reply
  #6  
Old 11-May-2006, 01:50
Douglas Douglas is offline
Registered Forum User
Mille
 
Posts: 118
Join Date: Jul 2005
clutch Fluid

Thanks for the link Shazaam!, very interesting thread.

In my case the fluid is certainly not the factory stuff, as it is a 1997 bike, and I replaced all the fluids before putting it on the road, and changed it again when I relaced the seal. Looking at the master cylinder resevoir the discolouration is caused by foreign bodies in the fluid which settle on the bottom of the resevoir. The new fluid has been in for about 10 days and 400ish miles. I use DOT4 fluid

The particles could easily be rubber fron the seal or the O ring, or dirt working its way past the seal in the slave cylinder
Quote+Reply
  #7  
Old 11-May-2006, 09:45
Chaz's Avatar
Chaz Chaz is offline
Registered Forum User
Ducati Corse
Bikes: 916 Strada
 
Posts: 3,844
Join Date: Jul 2003
Mood: www.od2racing.co.uk
If it's got the old type rubber pipe this can cause the promlem it's the rubber brakeing down on the inside, change it for a braided hose.
Quote+Reply
  
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes
Postbit Selector
Switch to Vertical postbit Use Vertical Postbit

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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Recent Posts - Contact Us - DSC Home - Archive - Top
Powered by vBulletin 3.5.4 - Copyright © 2000 - 2024, Jelsoft Enterprises Ltd. - © Ducati Sporting Club UK - All times are GMT +1. The time now is 00:15.