TD4 Clutch Bleeding

angeloc · Aug 18, 2011

Help! My clutch pedal seemed a bit low do I thought I would bleed the system. I connected a non return bleed kit to the bleed nipple and got my wife to depress the pedal while I opened the bleed valve - I closed it and the pedal has no feel to it now. I opened the reservoir and topped up the fluid. I pumped it vigorously and not have enough pedal to select gears but it is very low down.

Any tips on how to bleed this correctly? I have a Vacuum bleed kit and was going to try this - should I?

I have searched but the advice seems a bit at odds with itself.

Thanks

lozzzz · Aug 18, 2011

hi i presume your clutch slave cylinder is inside the gearbox can you see if there is any clutch fluid dripping on the floor or when you are bleeding the system is the resevoir empyting .if so the seals have gone and the gearbox will have to come out to replace the clutch slave cylinder .if you need any help email me .

angeloc · Aug 18, 2011

I will check it tomorrow. I was only bleeding it because I fancied the pedal was a bit low but in reality it was probably ok! It's now way down do I have obviously introduced air.

I font fully understand this "sealed unit" thing. Can it be bled conventionally? And should it be done as normal with the reservoir cap off - the fluid looked quite old in it (it's done 91k and I don't anything that says it's been changed etc)

My vacuum thing works well on my bikes and I have done a clutch on a VW with it so may give it a go on the weekend - UNLESS someone suggests otherwise. It's a fiddle getting to the bleed nipple though.

booboodag · Aug 18, 2011

Did you get her to pull the pedal up with her foot, the best way i have found is to open the master cylinder. Top up to top, open bleed nipple depress pedal close nipple pull up pedal, then repeat. before putting the cap back on cylinder put some rags under it to catch the excess fluid. Having said all that it normally only gives a short extension to the cylinder life.

angeloc · Aug 18, 2011

Yes that's what we did. I will go for the vacuum method - it usually works. Or I have used reverse bleeding as well - big syringe full of fluid on the bleed nipple and force it through - vacuum first less messy if that doesn't work I will try the other.

Is it an expensive job - I do all my own but accent back injury means I cannot think of lifting gearboxes!

I have a friendly local guy who is very reasonably priced.

mjrimmer · Aug 18, 2011

How was yer biking trip?

Just check the back of the clutch peddle where the master cylinder connects to it. On mine it had shifted to one side which let fluid get past the seal and also because of the angle it meant when you pressed the clutch in the extra distance made the biting point somewhere under the carpet.
I simply moved it back to where it should be bled the system and it's been fine for the last 6 months.

angeloc · Aug 19, 2011

mjrimmer said:
How was yer biking trip?

Just check the back of the clutch peddle where the master cylinder connects to it. On mine it had shifted to one side which let fluid get past the seal and also because of the angle it meant when you pressed the clutch in the extra distance made the biting point somewhere under the carpet.
I simply moved it back to where it should be bled the system and it's been fine for the last 6 months.

Ok I will check that - thanks - I plan to give a good going over on Saturday - day off work today so on the bike I think.

Bike trip was great - check out my blog - you will have to look through earlier posts as it is not one posting and the tri started on July so there first -
www.eurobike-angelo.blogspot.com

angeloc · Aug 19, 2011

Ok update

Checked pedal linkage etc and all was ok so I got my vacuum bleeder out and did it that way. Fluid was horrible colour so not been changed or bled from new probably.

I got as much out as possible and bled it through. RESULT - I now have a good pedal Phew!!! Hope it stats like that now.

Thanks guys for the help and advise.

TD4 Clutch Bleeding

angeloc

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lozzzz

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angeloc

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booboodag

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angeloc

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mjrimmer

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angeloc

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angeloc

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