Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > 998 / 996 / 916 / 748 > Clutch pump/fade

[zhed44]

I had very similar problems recently.

I've replaced the clutch slave piston (which was leaking slightly), greased the pushrod, replaced the pushrod gaiter, renewed the fluid and bled the system (twice). The pushrod at the pressure plate end had obviously been binding somehow as the hole in the slave cylinder piston had been machined by the rod spinning in the hole.

All working fine now

BTW ~ I bought a really good gizmo bleeder thingy on eBay - all it consists of is 3 or 4 syringes and some tubing, but for £4, its halved the time taken to do the job as it enabled me to reverse bleed the lines by sucking fluid through rather than pushing air out

I'll find the link and paste it up.....<edit> that link is for a 749 kit, but it may well be the same, if not, check his other items.

http://cgi.ebay.co.uk/DUCATI-749-DAR...cm dZViewItem

BRB

[rockhopper]

Push rod not spinning in its bearing is the most likley cause. When you think about it, if you are blasting down the road at 8000rpm then the clutch should be generating no heat at all plus the air flow at speed will keep it cool as well.

[CipiVTS]

good thing you solved it zhed. On mine, i completely flushed the system and cleaned the slave cylinder. I also greased everything and filled in some fresh Dot 5.1 fluid. It's ok, but only if i bleed it from time to time... every 300-400 miles. Otherwise the lever release point get's closer to the bar.

I still have to replace the pushrod (i belive it's bent cause i had a serious fall on the clutch side)

[jodycraw]

thing is it goes back to normal in just about 3 or 4 minutes after i've pulled in - and it isn;t effected by heat from tick over or anything - only when the plates are spinning really fast as in revving high.

I took the slave cylinder off and with the engine running in neutral i could stop the pushrod moving by holding it with my fingers so the bearing seems ok, and there doesn;t appear to be any fluid leaks or anything it's all bone dry.

Maybe as Shazam says there's water vapour in the system somewhere? I'll give that a try....

[Chrisiball]

HI Jody
Was you on the Yellow 748 at cadwell that nipped out at dinner?? Intermediate group??